WO2025105535A1 - Voltage regulator - Google Patents

Abstract

This voltage regulator comprises: a current source that outputs a reference current and a second current with respect to an input voltage or an output voltage; a load resistor that conducts a load current generated by combining one or more current sources; and a pass transistor controlled by the reference current, the second current, and the load current, wherein the voltage regulator maintains the output voltage stably and controls a constant voltage value according to fluctuations in the input voltage.

Description

Voltage regulator

The present invention relates to a constant voltage device, and more specifically, to a constant voltage device that maintains an output voltage stably and controls a constant voltage value according to fluctuations in an input voltage.

In the prior art related to the present invention, there is a constant voltage device. Patent Document 1 Nonvolatile semiconductor memory device and its constant voltage generation circuit can prevent transient overcharging of a bit line immediately after activation of a constant voltage generation circuit control signal, and prevent occurrence of a soft write phenomenon or reduction in read speed. In addition, Patent Document 2 Constant voltage generation circuit and semiconductor memory device can generate a high output voltage even when the power supply voltage is reduced. In addition, Patent Document 3 Constant voltage generation device can quickly and stably recover output voltage when the output voltage fluctuates due to a change in load current.

[Prior art literature]

[Patent Document]

Patent Registration No. 10-0295564 (July 12, 2001)

Patent Registration No. 10-0464897 (2005.01.07)

Publication of Patent Publication No. 10-2015-0031054 (2015.03.23)

The present invention aims to provide a constant voltage device that stabilizes an output voltage by forming a constant voltage feedback loop using a current source without using a conventional error amplifier.

The present invention aims to provide a constant voltage device that stabilizes an output voltage by forming a constant voltage feedback loop using a current source without using a conventional error amplifier.

In addition, the current source is characterized by taking an input voltage as input.

In addition, the current source is characterized by having an output voltage as an input.

In addition, the constant voltage device is characterized by including a reference voltage unit that outputs a reference voltage compared to an input voltage; a comparator that compares the reference voltage and the output voltage to output a control voltage; an RC filter that filters the control voltage and outputs a filtered control voltage; and a pass transistor controlled by the filtered control voltage.

In addition, the RC filter is characterized in that it is replaced with a load resistor and an LC filter.

In addition, the output voltage is characterized by being distributed.

In addition, the reference voltage unit is characterized by receiving an output voltage.

In addition, the voltage regulator is characterized by including a Schmitt trigger for triggering an output voltage; an RC filter for filtering the triggered voltage; and a pass transistor controlled by the filtered voltage.

In addition, the Schmitt trigger is characterized by being a digital Schmitt trigger and an analog Schmitt trigger.

The present invention can have the effect of stabilizing the output voltage and controlling the constant voltage value according to the fluctuation of the input voltage by configuring a constant voltage feedback loop using a current source without using a conventional error amplifier, thereby stabilizing the output voltage.

Figure 1 is an exemplary diagram showing a first embodiment of a conventional constant voltage device.

Figure 2 is an exemplary diagram showing a second embodiment of a conventional constant voltage device.

Figure 3 is an exemplary diagram showing a first embodiment of a constant voltage device of the present invention.

Figure 4 is an exemplary diagram showing a second embodiment of a constant voltage device of the present invention.

Figure 5 is an exemplary diagram showing a third embodiment of a constant voltage device of the present invention.

Figure 6 is an exemplary diagram showing a fourth embodiment of a constant voltage device of the present invention.

Figure 7 is an exemplary diagram showing a fifth embodiment of a constant voltage device of the present invention.

Figure 8 is an exemplary diagram showing a sixth embodiment of a constant voltage device of the present invention.

Figure 9 is an exemplary diagram showing a seventh embodiment of a constant voltage device of the present invention.

Figure 10 is an exemplary diagram showing an eighth embodiment of a constant voltage device of the present invention.

Figure 11 is an exemplary diagram showing a ninth embodiment of a constant voltage device of the present invention.

Figure 12 is an exemplary diagram showing a tenth embodiment of a constant voltage device of the present invention.

Figure 13 is an exemplary diagram showing an 11th embodiment of a constant voltage device of the present invention.

Figure 14 is an exemplary diagram showing a twelfth embodiment of a constant voltage device of the present invention.

Figure 15 is an exemplary diagram showing a 13th embodiment of a constant voltage device of the present invention.

Figure 16 is an exemplary diagram showing a 14th embodiment of a constant voltage device of the present invention.

Fig. 17 is an exemplary diagram showing the gate voltage of a pass transistor in a constant voltage device of the present invention.

Figure 18 is an exemplary diagram showing a 15th embodiment of a constant voltage device of the present invention.

Figure 19 is an exemplary diagram showing a 16th embodiment of a constant voltage device of the present invention.

Figure 20 is an exemplary diagram showing a 17th embodiment of a constant voltage device of the present invention.

Figure 21 is an exemplary diagram showing an 18th embodiment of a constant voltage device of the present invention.

Figure 22 is an exemplary diagram showing a 19th embodiment of a constant voltage device of the present invention.

Figure 23 is an exemplary diagram showing a current source applied to the constant voltage device of the present invention.

Hereinafter, a voltage regulator according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. In the following, descriptions of matters known in the art will be omitted or simplified in order to clarify the gist of the present invention. The components included in the description of the present invention operate individually or in a combined manner.

Figure 1 is an exemplary diagram showing a first embodiment of a conventional constant voltage device.

Referring to FIG. 1, the voltage regulator includes an error amplifier (30) that compares a reference voltage (20) and an output voltage, and a pass transistor (10) that is controlled by the output of the error amplifier (30) and transfers the input voltage to the output voltage.

The voltage regulator is composed of an error amplifier (30) and a pass transistor (10), and is connected through a feedback loop to stabilize and control the output voltage.

The error amplifier (30) plays an important role in the feedback loop of the constant voltage device, and compares the reference voltage (20) and the output voltage to amplify the error (difference) of the output voltage, and the error represents the difference between the desired output voltage and the current output voltage. The output of the error amplifier (30) controls the pass transistor (10) as a value obtained by amplifying the error signal, and is transmitted to the gate of the pass transistor to adjust the output voltage. If the output voltage is different from the reference voltage, the error amplifier (30) detects the difference and generates a control signal to adjust the operation of the pass transistor to maintain the output voltage at a desired value.

The pass transistor (10) transfers the input voltage to the output voltage and operates according to a control signal controlled by the error amplifier (30). The pass transistor (10) controlled by the output of the error amplifier (30) regulates the output voltage and maintains a constant voltage value. The constant voltage device transfers the output signal of the error amplifier (10) to the gate of the pass transistor, thereby allowing the pass transistor (10) to regulate the input voltage and minimize the error of the output voltage.

An error amplifier (30) and a pass transistor (10) are connected through a feedback loop, and the feedback loop monitors the output voltage and detects the difference from the constant voltage to perform necessary adjustments. The constant voltage device maintains the output voltage stable even when the input voltage fluctuates and controls the constant voltage value.

Figure 2 is an exemplary diagram showing a second embodiment of a conventional constant voltage device.

Referring to FIG. 2, the constant voltage device includes an error amplifier (30) that compares a reference voltage (20) and a division voltage of an output voltage, and a pass transistor (10) that is controlled by the output of the error amplifier (30) and transfers the input voltage to the output voltage.

The voltage regulator is composed of an error amplifier (30) and a pass transistor (10), and is connected through a feedback loop to stabilize and control the output voltage.

The error amplifier (30) plays an important role in the feedback loop of the constant voltage device, and compares the reference voltage (20) and the division voltage of the output voltage to amplify the error (difference) of the output voltage, and the error represents the difference between the desired output voltage and the current output voltage. The output of the error amplifier controls the pass transistor (10) as a value that amplifies the error signal, and is transmitted to the gate of the pass transistor (10), thereby regulating the output voltage. If the output voltage is different from the reference voltage or the division voltage, the error amplifier (30) detects the difference and generates a control signal to control the operation of the pass transistor (10) to maintain the output voltage at a desired value.

The pass transistor (10) transfers the input voltage to the output voltage and operates according to a control signal controlled by the error amplifier (30). The pass transistor (10) controlled by the output of the error amplifier (30) adjusts the input voltage to minimize the error of the output voltage, and transfers the output signal of the error amplifier (30) to the gate of the pass transistor (10), thereby adjusting the output voltage to match the reference voltage or the distribution voltage.

An error amplifier (30) and a pass transistor (10) are connected through a feedback loop, and the feedback loop monitors the output voltage and detects the difference from the reference voltage or the divided voltage to perform necessary adjustments. The constant voltage device maintains the output voltage stable according to the fluctuation of the input voltage and controls the constant voltage value.

Figure 3 is an exemplary diagram showing a first embodiment of a constant voltage device of the present invention.

Referring to FIG. 3, the constant voltage device includes a first current source (21) that outputs a reference current compared to an input voltage to a gate of a pass transistor (10); a second current source (22) that inputs a second current compared to an output voltage to a gate of the pass transistor (10); a load resistor (Rj) that flows a load current that is a difference between the reference current and the second current; and a pass transistor (10) that is controlled by an output of the load resistor (Rj) and transfers the input voltage to an output voltage.

The first current source (21) is one of the important components of the feedback loop and outputs a reference current relative to the input voltage to the gate of the pass transistor (10). In the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage and provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

The second current source (22) is a component of another feedback loop, which inputs a second current relative to the output voltage at the gate of the pass transistor (10). In the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage, and the output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop and flows the load current, which is the difference between the reference current and the second current. Within the feedback loop, the output of the load resistor (Rj) affects the first current source (21) and the second current source (22), thereby regulating and stabilizing the output voltage.

The pass transistor (10) is a key component that transfers the input voltage to the output voltage, and in the feedback loop, the pass transistor (10) is controlled by the outputs of the first current source (21), the second current source (22) and the load resistor (Rj), accurately regulates the input voltage to the output voltage, and achieves the main goal of the constant voltage device. The pass transistor (10) is an NMOS, NPN TR.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable according to the fluctuation of the input voltage and controls the constant voltage value.

Even if the input voltage changes, the reference current always flows steadily to the V _J point. At this time, assuming that the input voltage increases, the output voltage V _out passing through the pass transistor (10) increases. At this time, the second current source, I ₂ , also increases due to the increased output voltage.

Here, I _J = I _ref -I ₂ , and increasing the second current source decreases I _J .

Accordingly, the V _J = I _J R _J voltage decreases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J decreases, the pass transistor (10) is controlled (resistance change occurs), which in turn lowers the output voltage V _out again. At this time, the pass transistor (10) used is NMOS or NPN TR.

As a result, this lowered output voltage again reduces the second current source, I ₂ .

And then, I _J increases again (V _J also increases and the output voltage also increases). This is characterized by performing this continuously (repeatedly) to maintain a stable output voltage.

On the other hand, the opposite case is as follows. Even if the input voltage changes, the reference current always flows to the V _J point at a constant level. At this time, assuming that the input voltage decreases, the output voltage V _out passing through the pass transistor (10) decreases. At this time, the second current source, I ₂ , also decreases due to the decreased output voltage.

Here, I _J = I _ref -I ₂ , and a decrease in the second current source increases I _J .

Accordingly, the V _J = I _J R _J voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J increases, the pass transistor (10) is controlled (resistance change occurs), which in turn increases the output voltage V _out again. At this time, the pass transistor (10) used is NMOS or NPN TR.

As a result, this increased output voltage again increases the second current source, I ₂ .

And then, I _J decreases again (V _J also decreases and the output voltage also decreases). This is characterized by performing this continuously (repeatedly) to maintain a stable output voltage.

Figure 4 is an exemplary diagram showing a second embodiment of a constant voltage device of the present invention.

Referring to FIG. 4, the constant-voltage device includes a first current source (21) that inputs a reference current compared to an input voltage at a gate of a pass transistor (10); a second current source (22) that outputs a second current compared to an output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a difference between the reference current and the second current, at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

The first current source (21) is one of the important components of the feedback loop, and inputs a reference current compared to the input voltage to the gate of the pass transistor (10), and in the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

The second current source (22) is a component of another feedback loop, which outputs a second current relative to the output voltage to the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop, and flows a load current, which is a difference between the reference current and the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) affects the first current source (21) and the second current source (22), and controls the input voltage to the gate of the pass transistor (10) and regulates the output voltage.

The pass transistor (10) is a key component that transfers the input voltage to the output voltage, and in the feedback loop, the pass transistor (10) is controlled by the outputs of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) accurately regulates the input voltage to the output voltage to achieve the goal of the constant voltage device.

The feedback loop monitors changes in the output voltage and performs necessary adjustments by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable and controls the constant voltage value according to fluctuations in the input voltage.

Even if the input voltage changes, the reference current always flows out from the V _J point at a constant level. At this time, assuming that the input voltage increases, the output voltage V _out passing through the pass transistor (10) increases. At this time, the second current source, I ₂ , also increases due to the increased output voltage.

Here, I _J = I ₂ -I _ref , and increasing the second current source increases I _J .

Accordingly, the V _J = I _J R _J voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J increases, the pass transistor (10) is controlled (resistance change occurs), which in turn lowers the output voltage V _out again. At this time, the pass transistor (10) used is PMOS or PNP TR.

As a result, this lowered output voltage again reduces the second current source, I ₂ . Then, I _J is reduced again (V _J also decreases, and the output voltage increases again). This is performed continuously (repeatedly) to maintain a stable output voltage.

On the other hand, the opposite case is as follows. Even if the input voltage changes, the reference current always flows out from the V _J point at a constant level. At this time, assuming that the input voltage decreases, the output voltage V _out passed through the pass transistor (10) decreases. At this time, the second current source, I ₂ , also decreases due to the decreased output voltage.

Here, I _J = I ₂ -I _ref , and a decrease in the second current source decreases I _J .

Accordingly, the V _J = I _J R _J voltage decreases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J decreases, the pass transistor (10) is controlled (resistance change occurs), which in turn increases the output voltage V _out again. At this time, the pass transistor (10) used is PMOS or PNP TR.

As a result, this increased output voltage increases the second current source, I ₂ . Then, I _J is increased again (V _J also increases, and the output voltage decreases again). This is performed continuously (repeatedly) to maintain a stable output voltage.

Figure 5 is an exemplary diagram showing a third embodiment of a constant voltage device of the present invention.

Referring to FIG. 5, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares the reference voltage and an output voltage to output a control voltage through a gate of a pass transistor (10); a load resistor (Rj) that flows a load current compared to the control voltage through the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

The reference voltage unit (20) is one of the core components of the constant voltage device, and generates and outputs a reference voltage. Within the feedback loop, the reference voltage acts as a reference value for the desired output voltage, and is compared with the control voltage generated by the comparator (23), thereby being used to regulate the output voltage.

The comparator (23) is an important part in the feedback loop of the constant voltage device, and compares the reference voltage and the output voltage with the gate of the pass transistor (10) to generate a control voltage. In the feedback loop, the comparator (23) monitors the output voltage and detects the difference from the reference voltage, and the difference is amplified as a control voltage and used to control the pass transistor (10).

The load resistor (Rj) is an important component within the feedback loop and flows the load current relative to the control voltage at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the control voltage generated by the comparator (23) and the output of the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop detects changes in the output voltage and performs necessary adjustments through interactions between the reference voltage section (20), the comparator (23), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stably according to fluctuations in the input voltage and maintains the desired constant voltage value.

Even if the input voltage changes, the reference voltage is always constant, and I _J = (V _ref -V _fb )G _m varies depending on the V _out voltage. Here, assuming that the input voltage increases, the output voltage V _out that passes through the pass transistor (10) increases. At this time, the output current of G _m , I _J , decreases. (Since the reference voltage is fixed, the output current of G _m decreases when the feedback voltage increases.)

Accordingly, the V _J = I _J R _J voltage decreases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J decreases, the pass transistor (10) is controlled (resistance change occurs), which in turn lowers the output voltage V _out again. At this time, the pass transistor (10) used is NMOS or NPN TR.

As a result, the output voltage that has been lowered in this way increases I _J again (V _J also increases and the output voltage also increases). It is characterized by performing this continuously (repeatedly) to maintain a stable output voltage.

Meanwhile, even if the input voltage changes, the reference voltage is always constant, and I _J = (V _ref -V _fb )G _m changes depending on the V _out voltage. Here, assuming that the input voltage decreases, the output voltage V _out that passes through the pass TR decreases. At this time, the output current of G _m , I _J , increases. (Since the reference voltage is fixed, the output current of G _m increases when the feedback voltage increases.)

Accordingly, the V _J = I _J R _J voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J increases, the pass TR is controlled (resistance changes occur), which in turn increases the output voltage V _out again. At this time, the pass transistor (10) used is NMOS or NPN TR.

As a result, this increased output voltage decreases I _J again (V _J also decreases and the output voltage also decreases). It is characterized by performing this continuously (repeatedly) to maintain a stable output voltage.

Also, instead of R _J , capacitors and inductors can be used. In reality, it is possible to manufacture a semiconductor chip using even capacitors.

Figure 6 is an exemplary diagram showing a fourth embodiment of a constant voltage device of the present invention.

Referring to FIG. 6, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares a division voltage of a reference voltage and an output voltage to a gate of a pass transistor (10) and outputs a control voltage; a load resistor (Rj) that flows a load current compared to the control voltage from the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

The reference voltage unit (20) is one of the core components of the constant voltage device and generates and outputs a reference voltage. Within the feedback loop, the reference voltage acts as a reference value for the desired output voltage, is compared with the control voltage generated by the comparator (23), and is used to regulate the output voltage.

The comparator (23) is an important part in the feedback loop of the constant voltage device, and compares the division voltage of the reference voltage and the output voltage with the gate of the pass transistor (10) to generate a control voltage. In the feedback loop, the comparator (23) monitors the output voltage and detects the difference from the reference voltage, and the difference is amplified as a control voltage and used to control the pass transistor (10).

The load resistor (Rj) is an important component within the feedback loop and flows the load current relative to the control voltage at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the control voltage generated by the comparator (23) and the output of the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop detects changes in the output voltage and performs necessary adjustments through interactions between the reference voltage section (20), the comparator (23), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stably according to fluctuations in the input voltage and maintains the desired constant voltage value.

Figure 7 is an exemplary diagram showing a fifth embodiment of a constant voltage device of the present invention.

Referring to FIG. 7, the constant-voltage device includes a first current source (21) that outputs a reference current compared to an input voltage to a gate of a pass transistor (10); a second current source (22) that inputs a second current compared to an input voltage to a gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a difference between the reference current and the second current, to the gate of the pass transistor (10); and a pass transistor (10) that is controlled by an output of the load resistor (Rj) and transfers an input voltage to an output voltage.

The first current source (21) is one of the important components of the feedback loop and outputs a reference current relative to the input voltage to the gate of the pass transistor (10). In the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage, and the first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

The second current source (22) is a component of another feedback loop, which inputs a second current relative to the input voltage at the gate of the pass transistor (10). In the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage, and the output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop, and flows a load current, which is a difference between the reference current and the second current, at the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop affects the first current source (21) and the second current source (22), and regulates the operation of the pass transistor (10) to stabilize the output voltage.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable according to the fluctuation of the input voltage and controls the constant voltage value.

Figure 8 is an exemplary diagram showing a sixth embodiment of a constant voltage device of the present invention.

Referring to FIG. 8, the constant-voltage device includes a first current source (21) that inputs a reference current compared to an input voltage to a gate of a pass transistor (10); a second current source (22) that outputs a second current compared to the input voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a difference between the reference current and the second current, to the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

The first current source (21) is one of the important components of the feedback loop, and inputs a reference current in comparison to the input voltage at the gate of the pass transistor (10), and in the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor to control the operation of the pass transistor (10).

The second current source (22) is a component of another feedback loop, which outputs a second current relative to the input voltage to the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop, and the load current, which is the difference between the reference current and the second current, flows through the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop is related to the output voltage, and if necessary, the value of the load resistor (Rj) is adjusted to control the load current and stabilize the output voltage.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable according to the fluctuation of the input voltage and controls the constant voltage value.

Figure 9 is an exemplary diagram showing a seventh embodiment of a constant voltage device of the present invention.

Referring to FIG. 9, the constant-voltage device includes a first current source (21) that outputs a reference current compared to an output voltage to a gate of a pass transistor (10); a second current source (22) that inputs a second current compared to an output voltage to a gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a difference between the reference current and the second current, to the gate of the pass transistor (10); and a pass transistor (10) that is controlled by an output of the load resistor (Rj) and transfers an input voltage to an output voltage.

The first current source (21) is one of the important components of the feedback loop and outputs a reference current relative to the output voltage to the gate of the pass transistor (10). Within the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

The second current source (22) is a component of another feedback loop, which inputs a second current relative to the output voltage at the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop, and the load current, which is the difference between the reference current and the second current, flows through the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable according to the fluctuation of the input voltage and controls the constant voltage value.

Figure 10 is an exemplary diagram showing an eighth embodiment of a constant voltage device of the present invention.

Referring to FIG. 10, the constant-voltage device includes a first current source (21) that inputs a reference current compared to an output voltage from a gate of a pass transistor (10); a second current source (22) that outputs a second current compared to an output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a difference between the reference current and the second current, from the gate of the pass transistor (10); and a pass transistor (10) that is controlled by an output of the load resistor (Rj) and transfers an input voltage to an output voltage.

The first current source (21) is one of the important components of the feedback loop, and inputs a reference current compared to the output voltage at the gate of the pass transistor (10), and in the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

The second current source (22) is a component of another feedback loop, which outputs a second current relative to the output voltage to the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop, and the load current, which is the difference between the reference current and the second current, flows through the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable according to the fluctuation of the input voltage and controls the constant voltage value.

Figure 11 is an exemplary diagram showing a ninth embodiment of a constant voltage device of the present invention.

Referring to FIG. 11, the constant voltage device includes a second current source (22) that outputs a second current relative to the output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a second current, that is, a load current, from the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers an input voltage to an output voltage.

The second current source (22) is one of the important components of the feedback loop, and outputs a second current relative to the output voltage to the gate of the pass transistor (10), and within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop, and flows the second current, the load current, from the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop is related to the output voltage, and the load current is controlled and the output voltage is stabilized by adjusting the value of the load resistor (Rj).

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable and controls the constant voltage value according to the fluctuation of the input voltage.

Assuming that there is no change in the input voltage, this is only the case when there is a change in the output load. If the output load increases, the output voltage decreases and the second current source, I ₂ , also decreases. Here, I ₂ =I _J .

Accordingly, the V _J = I _J R _J voltage decreases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J decreases, the pass transistor (10) is controlled (resistance changes occur), which in turn increases the output voltage V _out again. At this time, the pass transistor (10) used is PMOS or PNP TR.

As a result, this increased output voltage again increases the second current source, I ₂ .

And then, I _J is increased again (V _J also increases and the output voltage decreases). This is characterized by continuously (repeatedly) performing this to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

On the other hand, assuming that there is no change in the input voltage, this is only the case when there is a change in the output load. If the output load decreases, the output voltage increases and the second current source, I _{2 ,} also increases.

Accordingly, the V _J = I _J R _J voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J increases, the pass transistor (10) is controlled (resistance change occurs), which in turn lowers the output voltage V _out again. At this time, the pass transistor (10) used is PMOS or PNP TR.

As a result, this lowered output voltage again reduces the second current source, I ₂ .

And, I _J is decreased again (V _J also decreases and the output voltage increases). It is characterized by performing this continuously (repeatedly) to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

Figure 12 is an exemplary diagram showing a tenth embodiment of a constant voltage device of the present invention.

Referring to FIG. 12, the constant voltage device includes a second current source (22) that inputs a second current compared to the output voltage at the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is the second current, at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

The second current source (22) is one of the important components of the feedback loop, inputting a second current in comparison with the output voltage at the gate of the pass transistor (10), and within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

The load resistor (Rj) plays a very important role in the feedback loop, and flows the second current, the load current, from the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop is related to the output voltage, and the load current is controlled and the output voltage is stabilized by adjusting the value of the load resistor (Rj).

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable and controls the constant voltage value according to the fluctuation of the input voltage.

Figure 13 is an exemplary diagram showing an 11th embodiment of a constant voltage device of the present invention.

Referring to FIG. 13, the constant voltage device includes a second current source (22) that outputs a second current relative to the input voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a second current, i.e., a load current, from the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

The second current source (22) is one of the important components of the feedback loop, and outputs a second current relative to the input voltage to the gate of the pass transistor (10), and within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor.

The load resistor (Rj) plays a very important role in the feedback loop, and flows the second current, the load current, from the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop is related to the output voltage, and the load current is controlled and the output voltage is stabilized by adjusting the value of the load resistor (Rj).

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable and controls the constant voltage value according to the fluctuation of the input voltage.

Assuming that there is no change in the load voltage, this is only the case when there is a change in the input. If the input increases, the output voltage increases, and the second current source, I ₂ , also increases. Here, I ₂ =I _J .

Accordingly, the V _J = I _J R _J voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J increases, the pass TR is controlled (resistance changes occur), which in turn lowers the output voltage V _out again. At this time, the pass transistor (10) used is PMOS or PNP TR.

As a result, it proceeds with this lowered output voltage. However, because the input voltage is high, the second current source, I _{2 ,} is immediately increased.

And then, I _J increases again (V _J also increases and the output voltage decreases). This is characterized by performing this continuously (repeatedly) to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

On the other hand, assuming that there is no change in the load voltage, this is only the case when there is a change in the input. If the input decreases, the output voltage decreases and the second current source, I ₂ , also decreases. Here, I ₂ = I _J .

Accordingly, the V _J = I _J R _J voltage decreases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, when V _J decreases, the pass transistor (10) is controlled (resistance change occurs), which in turn increases the output voltage V _out again. At this time, the pass transistor (10) used is PMOS or PNP TR.

As a result, it proceeds with this increased output voltage. However, due to the low input voltage change, the second current source of the input, I _{2 ,} is immediately reduced.

And, I _J is decreased again (V _J also decreases and the output voltage increases). It is characterized by performing this continuously (repeatedly) to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

Figure 14 is an exemplary diagram showing a twelfth embodiment of a constant voltage device of the present invention.

Referring to FIG. 14, the constant voltage device includes a second current source (22) that inputs a second current compared to an input voltage at the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a second current, at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

The second current source (22) is one of the important components of the feedback loop, and inputs a second current relative to the input voltage at the gate of the pass transistor (10). Within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor.

The load resistor (Rj) plays a very important role in the feedback loop, and flows the second current, the load current, from the gate of the pass transistor (10). The output of the load resistor (Rj) within the feedback loop is related to the output voltage, and the load current is controlled and the output voltage is stabilized by adjusting the value of the load resistor (Rj).

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the constant voltage device maintains the output voltage stable and controls the constant voltage value according to the fluctuation of the input voltage.

It cannot be realized when the direction of the current is reversed.

In the above invention, R _J can be realized using other passive components. That is, it is characterized in that the output voltage can be created using a capacitor or an inductor instead of a resistor. That is, V _out = J _m I _J R _J

V _out =J _m I _J Z _CJ

Z _CJ = (1/2πC)T, the voltage is 0 at the beginning and gradually charges as time passes.

V _out =J _m I _J Z _LJ

Z _LJ =(2πL)T, the voltage is infinite at the beginning and gradually decreases as time passes.

Here, this is another completely new configuration. The constant voltage device can be configured with a completely new constant voltage characteristic by introducing an inductor and a capacitor. In this case, a high power device can be designed.

Figure 15 is an exemplary diagram showing a 13th embodiment of a constant voltage device of the present invention.

Referring to FIG. 15, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares the reference voltage and the output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers the input voltage to the output voltage.

The reference voltage unit (20) is one of the core components of the constant voltage device and outputs a reference voltage compared to the input voltage. The reference voltage is used as a setting value for the desired output voltage, and the output is compared with the reference voltage.

A comparator (23) compares a reference voltage and an output voltage to output a control voltage, and as one of the core elements of a feedback loop, monitors the output voltage and generates a control voltage by comparing it with the reference voltage.

The RC filter filters the control voltage, reduces unstable fluctuations, and provides smooth control. The output of the RC filter smoothes out changes in the control voltage and improves stability.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and adjusts the control voltage through the comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smoothes the control voltage, and the constant voltage device maintains the output voltage stable and controls the constant voltage value according to the fluctuation of the input voltage.

Figure 16 is an exemplary diagram showing a 14th embodiment of a constant voltage device of the present invention.

Referring to FIG. 16, the constant voltage device includes a reference voltage section (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares a division voltage of the reference voltage and an output voltage and outputs a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers the input voltage to the output voltage.

The reference voltage unit (20) is one of the core components of the constant voltage device and outputs a reference voltage compared to the input voltage. The reference voltage is used as a setting value for the desired output voltage, and the output is compared with the reference voltage.

A comparator (23) compares the division voltage of the reference voltage and the output voltage to output a control voltage, and as one of the core elements of the feedback loop, monitors the output voltage and generates a control voltage by comparing it with the reference voltage.

The RC filter filters the control voltage, reduces unstable fluctuations, and provides smooth control. The output of the RC filter smoothes out changes in the control voltage and improves stability.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and adjusts the control voltage through the comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smoothes the control voltage, and the constant voltage device maintains the output voltage stable and controls the constant voltage value according to the fluctuation of the input voltage.

Fig. 17 is an exemplary diagram showing the gate voltage of a pass transistor in a constant voltage device of the present invention.

Referring to Figure 17, the gate voltage of the pass transistor repeatedly rises and falls depending on the on/off of the pass transistor.

The gate voltage of the pass transistor (10) changes repeatedly according to the on/off operation of the pass transistor (10).

In the initial state, the pass transistor (10) is in the inactive state (off), so the gate voltage is at a low level and the output voltage should be equal to or very close to the constant voltage.

When the output load fluctuates due to load change, the feedback loop of the voltage regulator detects this, and the feedback loop checks the change in the output voltage through the comparator and increases the gate voltage of the pass transistor to adjust the control voltage.

As the gate voltage increases, the feedback loop increases the gate voltage of the pass transistor (10) to activate (on) the pass transistor (10). The input voltage will try to regulate and increase the output voltage.

In output stabilization, when the gate voltage rises and the pass transistor (10) is activated, the output voltage is regulated and stabilized.

The feedback loop continuously adjusts the gate voltage until the output approaches the reference voltage.

In a stable state, the gate voltage is regulated so that the pass transistor (10) is kept on. The output voltage is stabilized to a desired value, and the gate voltage is maintained.

In load change and readjustment, if the output load changes again, the feedback loop adjusts the gate voltage again to stabilize the output. The process is repeated continuously.

The gate voltage of the pass transistor (10) continuously fluctuates according to the operation of the feedback loop and regulates the output voltage to a desired value.

Figure 18 is an exemplary diagram showing a 15th embodiment of a constant voltage device of the present invention.

Referring to FIG. 18, the constant voltage device includes a reference voltage section (20) that outputs a reference voltage compared to an output voltage; a comparator (23) that compares the reference voltage and the output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers an input voltage to an output voltage.

The reference voltage unit (20) is one of the core components of the constant voltage device, outputs a reference voltage compared to the output voltage, and the reference voltage is used as a setting value for the desired output voltage, and the output is compared with the reference voltage.

A comparator (23) compares a reference voltage and an output voltage to output a control voltage. The comparator (23) is one of the core elements of a feedback loop, monitors the output voltage, compares it with the reference voltage, and generates a control voltage.

The RC filter filters the control voltage, reduces unstable fluctuations, and provides smooth control. The output of the RC filter smoothes out changes in the control voltage and improves stability.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and adjusts the control voltage through the comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smoothes the control voltage, and the voltage regulator detects the change in the output voltage and adjusts the control voltage by comparing it with the reference voltage to maintain the desired output voltage. A stable output voltage is maintained despite the change in the input voltage.

Figure 19 is an exemplary diagram showing a 16th embodiment of a constant voltage device of the present invention.

Referring to FIG. 19, the constant voltage device includes a reference voltage section (20) that outputs a reference voltage compared to an output voltage; a comparator (23) that compares a division voltage of the reference voltage and the output voltage and outputs a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers an input voltage to an output voltage.

The reference voltage unit (20) is one of the core components of the constant voltage device, generates a reference voltage compared to the output voltage, and the reference voltage is used as a setting value for the desired output voltage.

The comparator (23) generates a control voltage by comparing the reference voltage and the divided voltage of the output voltage, and is an important part of the feedback loop, monitoring the output voltage and measuring the difference from the reference voltage to generate a control voltage.

The RC filter filters the control voltage to smooth it, improve the stability of the feedback loop, and reduce unstable fluctuations.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the change in the output voltage and adjusts the control voltage through the comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smoothes this control voltage, and the voltage regulator detects the change in the output voltage and adjusts the control voltage by comparing it with the reference voltage to maintain the desired output voltage. A stable output voltage is maintained despite the change in the input voltage.

Figure 20 is an exemplary diagram showing a 17th embodiment of a constant voltage device of the present invention.

Referring to FIG. 20, the constant voltage device includes a Schmitt trigger (24) that triggers an output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transmits an input voltage to an output voltage.

Schmitt trigger is a type of nonlinear logic gate that triggers an output voltage to output a control voltage and has a characteristic that the output voltage switches when the input voltage exceeds a certain threshold. This characteristic provides stability against noise or fluctuating input. Schmitt trigger (24) is used in a feedback loop to generate a control voltage and trigger an output according to the previous output state.

The RC filter filters the control voltage and, as a low-pass filter, removes high-frequency noise and rapid voltage fluctuations to generate a stabilized control voltage. The RC filter has filtering characteristics determined by the time constant RC, and the output of the RC filter is used to improve the stability and accuracy of the feedback loop.

The pass transistor (10) plays a role in transferring the input voltage to the output voltage, and receives a control voltage at the gate, appropriately amplifies or stabilizes the input voltage, and then transfers it to the output. The pass transistor (10) controls the flow of current according to the control voltage to maintain the output voltage at the desired value.

In connection with the feedback loop, the Schmitt trigger (24) monitors changes in the input voltage, the RC filter improves the stability of the control voltage, and the pass transistor (10) ultimately generates and maintains the desired output voltage.

Figure 21 is an exemplary diagram showing an 18th embodiment of a constant voltage device of the present invention.

Referring to FIG. 21, the constant voltage device includes a digital Schmitt trigger (25) that triggers an output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transmits an input voltage to an output voltage.

The digital Schmitt trigger (25) triggers the output voltage to generate a control voltage and is an important part of the feedback loop, monitoring fluctuations in the output voltage and generating a control voltage when it detects a change above a certain threshold.

The RC filter filters the control voltage to smooth it, improve the stability of the feedback loop, and reduce unstable fluctuations.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the fluctuation of the output voltage and generates a control voltage through the digital Schmitt trigger (25) to maintain the desired output voltage. The RC filter stabilizes and smoothes the control voltage, and the constant voltage device detects the fluctuation of the output voltage and maintains a stable output voltage through the digital Schmitt trigger (25) and the RC filter. The constant voltage device maintains a stable output voltage despite the fluctuation of the input voltage.

Figure 22 is an exemplary diagram showing a 19th embodiment of a constant voltage device of the present invention.

Referring to FIG. 22, the constant voltage device includes an analog Schmitt trigger (26) that triggers an output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transmits an input voltage to an output voltage.

The analog Schmitt trigger (26) triggers the output voltage to generate a control voltage and is an important part of the feedback loop, monitoring the fluctuation of the output voltage and generating a control voltage when it detects a change above a certain threshold. The analog Schmitt trigger (26) converts an analog input signal into a digital signal and generates a control voltage based on the digital signal.

The RC filter filters the control voltage to smooth it, improve the stability of the feedback loop, and reduce unstable fluctuations.

The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

The feedback loop monitors the fluctuations in the output voltage and generates a control voltage through the analog Schmitt trigger (26) to maintain the desired output voltage. The RC filter stabilizes and smoothes this control voltage, and the voltage regulator detects the fluctuations in the output voltage and maintains a stable output voltage through the analog Schmitt trigger (26) and the RC filter. The voltage regulator maintains a stable output voltage despite fluctuations in the input voltage.

Figure 23 is an exemplary diagram showing a current source applied to the constant voltage device of the present invention.

Referring to FIG. 23, (a) of FIG. 23 shows a current mirror that flows a reference current in proportion to the output voltage or input voltage, (b) of FIG. 23 shows a triple current mirror that flows a reference current in proportion to the output voltage or input voltage, and (c) of FIG. 23 shows a transistor that flows a reference current in proportion to the output voltage or input voltage.

Current mirrors pass a reference current relative to the output voltage or input voltage, and are usually composed of one or more transistors and a resistor. When a reference current is injected into one transistor, the transistor helps to replicate the reference current. Depending on the input voltage or output voltage, the replicated reference current flows.

Triple current mirror is an extended version of current mirror, it performs more precise current replication, and generally uses three transistors to replicate the current, and the transistors are connected to each other to replicate the current at a constant rate. This provides more precise control and stability in the constant voltage device. Triple current mirror enables precise current replication in the constant voltage device.

A transistor is a semiconductor device that controls current and controls current by adjusting the gate voltage according to the output voltage or input voltage. A transistor acts as a current-passing device and controls the flow of current by adjusting the gate voltage of the transistor. A transistor generates a desired output voltage or controls the input voltage by replicating or regulating the current. In a constant-voltage device, a transistor is used to regulate current and stabilize voltage.

Current mirrors, triple current mirrors, and transistors play important roles in the feedback loop and control system of the voltage regulator. Current mirrors and triple current mirrors are used to replicate and stabilize current, and transistors are used to control current and voltage.

The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims, and such modifications are within the scope of the claims.

[Explanation of symbols]

10: Pass transistor

20: Reference voltage section

21: First current source

22: Second current source

23: Comparator

24: Schmidt Trigger

25: Digital Schmitt Trigger

26: Analog Schmitt Trigger

30: Error amplifier

Claims (9)

A current source that outputs a reference current, a second current, versus the input voltage or output voltage; A load resistor that flows a load current generated by combining one or more of the above current sources; and A constant voltage device, characterized by including a pass transistor controlled by the reference current, the second current, and the load current. In the first paragraph, The above current source is a constant voltage device characterized in that it takes an input voltage as input. In the first paragraph, The above current source is a constant voltage device characterized in that it takes an output voltage as an input. A reference voltage section that outputs a reference voltage compared to the input voltage; A comparator that compares the reference voltage and the output voltage and outputs a control voltage; An RC filter that filters the above control voltage and outputs the filtered control voltage; and A constant voltage device, characterized by including a pass transistor controlled by a filtered control voltage. In paragraph 4, A constant voltage device, characterized in that the RC filter is replaced with a load resistor and an LC filter. In paragraph 4, A constant voltage device, characterized in that the above output voltage is distributed. In paragraph 4, A constant voltage device, characterized in that the above reference voltage unit receives an output voltage. Schmitt trigger that triggers the output voltage; RC filter that filters the triggered voltage; A constant voltage device, characterized by including a pass transistor controlled by a filtered voltage. In Article 8, A constant voltage device, characterized in that the above Schmitt trigger is a digital Schmitt trigger or an analog Schmitt trigger.

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