SU1075384A2 - Step voltage former - Google Patents

Abstract

FORMER OF STEPS VOLTAGE on aut.St. 705654, which is so demanding that, in order to expand the functional capabilities of the device by ensuring the formation of an exponential variable stepwise loading, an additional key was introduced into it, the input of which is connected to the output of the first memory element, the output is connected to the third input of the adder, and the control input of the auxiliary key is connected to the sixth output of the clock generator. (L | sd 00 00 4

Description

The invention relates to a pulse technique and is intended for use in forming devices with a high temporal stability of the output signal parameters. According to the main auth. No. 705654, a device is known. For shaping a step voltage, comprising an input key, the input of which is connected to an input source at the yarn, a storage element, a clock generator, the first and second inputs of which are connected respectively to the control inputs of the storage element and the input key, an adder, an additional storage element, the first and second output keys, the inputs of which are connected respectively to the outputs of the storage and additional storage elements, the outputs are connected to the first input of the sums The second input is connected to the output of the input key, and the output of the adder is connected to the inputs of the storage element and the additional storage element, and the control inputs of the first and second output keys and the additional storage element are connected respectively to the third, fourth and fifth outputs JY clock generator. The known device forms a stepwise voltage, which increases according to a linear law. However, the known device does not provide for the formation of a stepwise voltage, varying exponentially. This disadvantage of the known step voltage shaper limits its functionality and does not allow it to be used for modeling a wide class of automatic devices. The aim of the invention is to extend the functionality of a step voltage shaper by providing stepwise voltage variation that changes exponentially: in law. The goal is achieved by adding an additional key to the device, the input of which is connected to the output of the first storage element, the output of this key is connected to the third input of the adder, and the control input of the additional key is connected to the sixth output of the product generator. ° Figure 1 shows the layout of the device; 2 shows time diagrams that explain his work. The device contains an input voltage source 1, the output of which is connected via the input key 2 to the first input of the adder 3, the first and second storage elements 4 and 5, the first storage element 4 being formed by the key 6, the input of which is the input of the storage element and connected to the output an adder 3, a capacitor, 7 and an amplifier 8, the output of which is the output of the memory element. The second memory element 5 is formed by a key 9, the input of which is the input of the memory element and connected to the output of the adder 3, a capacitor 10 and an amplifier 11 whose output is the output of the memory element. Additional key 12 input is connected to the output of amplifier 8, and the output is connected to the third input of the adder 3. The clock generator 13, the outputs of which are connected respectively to the control inputs of the keys 2,6,9 and. 12, as well as to the control inputs of the output keys 14 and 15, the outputs of which are combined and connected to the second input of the adder 3, the outputs of the storage elements 4 and 5 are connected to the inputs of the keys 14 and 15. The device operates as follows. The clock generator 13 forms two pulse voltages shifted by 180 (Fig. 2a, B). The shaper provides operation in two modes: the formation of a step voltage, which increases according to a linear law; the formation of a step voltage, increasing according to the exponential law. When the circuit operates in the first mode, the first pulse voltage (Fig. 2) controls the operation of the keys 2,14 and 9, and the second voltage (Fig. 2b) controls the operation of the keys 15 and 6 The auxiliary key 12 in this mode remains locked. The adder 3 has a transmission coefficient K ≈ il on the first and third inputs, and a transmission coefficient on the second input equal to 1. Capacitors 7 and 10 are discharged before switching on the circuit. When the first control pulse arrives, the switches are 2.14 and 9. At the output of the adder 3, the voltage is set to K and, where and is the voltage of source 1. At the same time, the capacitor 10 is charged through a small output resistance of the adder 3 to the voltage KU (FIG. 2b).

The parameters of the scheme are chosen so that the following ratios are chosen:

. {)

 (2)

where r

 - output impedance of the adder 3;

- storage capacitor capacity;

g

-the duration of the control pulse;

 input impedance of the storage element amplifier.

When inequality (1) is fulfilled, the voltage to which the conditioner is charged will not depend on the change of its capacitance value, and if inequality (2) is fulfilled, the voltage on the capacitor will remain unchanged during time t when the storage element is open. .

Thus, during the first period, the voltage on the capacitor 10 remains unchanged and is equal to K and.

When opening the key 15 and the key, the other keys are locked.

The voltage equal to K and from the output of amplifier 11 through the switch 15 is fed to the second input of the adder 3, the transfer coefficient of which is 1. As a result, the capacitor 7 than the public key b is charged before the voltage K and. Next, the keys are closed again at 2.14 and 9. At the same time, the output of the adder 3 sets a voltage of 2K U, since the first input of the adder 3 has a voltage of and, and the transmission coefficient over this input is K, and the second input of the adder 3 acting through the key 4, the voltage K U and the transmission coefficient for this input is equal to 1.

The voltage from the output of the adder 3 is stored on the capacitor 10 and at the output of the amplifier 11 a voltage of 2K is set (Fig. 2) l at the next cycle this voltage

rewritten to capacitor 7 again.

Further, the processes are repeated with period 2. As a result, stepped voltages are generated at the outputs of amplifiers 8 and 11, linearly increasing and shifted by time J, with the increment value for each clock cycle being K and (FIG.2 & , 1st mode).

0

At. in the second mode, the additional switch 12 is connected to the inverting (third) input of the adder 3, therefore, at each clock cycle, when the keys are 2,14, 9 and 12, the voltage will be subtracted from the voltage that is copied to the capacitor 10 equal to KUg, where Ug is the voltage at the output of the amplifier 8.

20

Thus, the magnitude of the voltage increment on capacitors 7 and 10 will decrease with each clock cycle, and the step voltage on

The 5 outputs of the amplifiers 8 and 11 will vary exponentially (Fig. 2b, 2nd mode). In this case, in order to change the time constant of the exponent, it is necessary to vary the transfer coefficient of adder 3 on the third input.

The technical effect of the use of the invention is expressed in expanding the functionality of the stepped tension shaper. This is expressed in that the invention allows to form not only a highly stable step voltage varying linearly, but also a highly stable step voltage varying exponentially, which allows it to be used to simulate a wide class of automatic devices.

In the proposed device, the instability of the circuit parameters is excluded, due to the temporary instability of the capacitance capacitance.

F1, D.2

Claims (1)

SHAPED VOLTAGE SHAPER for ed. No. 705654, which is due to the fact that, in order to expand the functionality of the device by ensuring the formation of an exponentially varying step voltage, an additional key is inserted into it, the input of which is connected to the output of the first storage element, the output connected to the third input of the adder, and the control input of the additional key is connected to the sixth output of the clock generator. FIG. Ί