CN112564717A - Short-wave radio frequency communication pulse width duty cycle protection receiving and transmitting circuit - Google Patents
Short-wave radio frequency communication pulse width duty cycle protection receiving and transmitting circuit Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a short-wave radio frequency communication pulse width duty cycle protection transceiving circuit, which comprises two paths of amplifying circuits, a section selecting switch, a transceiving switch circuit, a pulse width duty cycle protection circuit and a power supply module for supplying power; the input end of the pulse width duty ratio protection circuit is connected with the power supply module through the current detection module so as to collect the total output current value of the power supply module; the pulse width duty ratio protection circuit is used for integrating and judging the current value acquired by the current detection module and outputting a shutdown signal when the pulse width or the duty ratio is greater than a set value; the output end of the pulse width duty ratio protection circuit is respectively connected with the radio frequency devices of the two paths of amplifying circuits through the PTT module. The invention can realize the protection of the pulse width duty ratio, avoid the burnout of the radio frequency device caused by the overheating of the pulse width or the duty ratio, and improve the working reliability of the circuit.
Description
Technical Field
The invention relates to the technical field of radio frequency, in particular to a short-wave radio frequency communication pulse width duty cycle protection receiving and transmitting circuit.
Background
Short wave radio frequency communication is a radio communication mode, mainly refers to signal communication in a frequency range of 1.6M-30M, has the advantages of simple equipment, low cost, convenient and flexible use and the like, and is one of important means for near, medium and long distance military and civil communication.
The situation of over-high pulse width duty ratio and even continuous wave working situation can occur in the communication process or the product test process; however, the existing short-wave communication transceiver circuit lacks pulse width duty cycle protection; if the pulse width and the duty ratio are too high, the radio frequency device can be caused to run in an overload mode, heat is rapidly generated, heat cannot be timely discharged, the radio frequency device is easily burnt out, and the reliable running of a circuit is not facilitated. Therefore, it is desirable to design a short-wave radio frequency communication pulse width duty cycle protection transceiver circuit with pulse width duty cycle protection.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a short-wave radio frequency communication pulse width duty cycle protection transceiving circuit; the invention can realize the protection of the pulse width duty ratio, avoid the burnout of the radio frequency device caused by the overheating of the pulse width or the duty ratio, and improve the working reliability of the circuit.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a shortwave radio frequency communication pulsewidth duty cycle protection transceiver circuit which characterized in that: the power supply circuit comprises two paths of amplifying circuits, a section selecting switch, a transceiving switch circuit, a pulse width duty ratio protection circuit and a power supply module for supplying power; the two paths of amplifying circuits are connected with the section selection switch so as to realize that one path of amplifying circuit is conducted and the other path of amplifying circuit is closed; the section selection switch is connected with the receiving port or the antenna port through the transceiving switch circuit;
the input end of the pulse width duty ratio protection circuit is connected with the power supply module through the current detection module so as to collect the total output current value of the power supply module; the pulse width duty ratio protection circuit is used for integrating and judging the current value acquired by the current detection module and outputting a shutdown signal when the pulse width or the duty ratio is greater than a set value; and the output end of the pulse width duty cycle protection circuit is respectively connected with the radio frequency devices of the two paths of amplifying circuits through the PTT module.
The invention adds a pulse width duty ratio protection circuit, integrates and analyzes the current value of a power supply module collected by a current detector, and outputs a shutdown signal to stop the work of a radio frequency device of an amplifying circuit and close the power amplification function when the pulse width or the duty ratio is larger than a set value; after the heat is released, a radio frequency device is started to start a power amplifier, so that pulse width duty ratio protection is realized; the pulse width duty cycle protection can avoid the burnout of the radio frequency device caused by the overheating of the pulse width or the duty cycle, and improve the working reliability of the circuit.
Preferably, the pulse width duty cycle protection circuit comprises a comparator integration module and a triode amplification module which are connected in sequence.
Preferably, the comparator integration block comprises comparator a1, comparator a2, nand gate G1, and nand gate G2; the triode amplifying module comprises a triode Q201;
the input end of the pulse width duty cycle protection circuit is connected with the positive input of a comparator A1, and the negative input of the comparator A1 is connected with a first comparison voltage; the output end of the comparator A1 is connected with the negative input of the comparator A2 through a diode D201, the positive input of the comparator A2 is connected with a comparison voltage II, and the positive input of the comparator A2 is also connected with the output end of the comparator A2 through a resistor R209; the output end of the comparator A1 is also connected with the input end I of the NAND gate G2 through the NAND gate G1; the second input end of the NAND gate G2 is connected with the output end of the comparator A2, and the output end of the NAND gate G2 is connected with the negative input of the comparator A2 through a diode D202 and a resistor R205 which are connected in series; the negative pole input of the comparator A2 is connected with the output end of the comparator A2 through a resistor R206 and a diode D203 which are connected in series; the output end of the comparator A2 is connected with the PTT module through a triode Q201. The pulse width duty cycle protection circuit can effectively realize the pulse width duty cycle protection function.
Preferably, the two paths of amplifying circuits respectively comprise a preceding stage amplifying unit, a push stage amplifying unit and a final stage amplifying unit which are connected in sequence; the pre-stage amplification unit is connected with the signal input port, and the final-stage amplification unit is connected with the section selection switch.
Preferably, the radio frequency device comprises a radio frequency amplification module U1 and a radio frequency tube; the radio frequency amplification module is positioned in the pre-stage amplification unit, and the radio frequency tube is positioned in the final-stage amplification unit.
Preferably, there are two rf tubes of the final amplifying unit, which are rf tube VQ1 and rf tube VQ 2; the final amplifying unit also comprises a matched distributed magnetic core cable transformer and a matched synthesized magnetic core cable transformer;
the push-stage amplification unit is connected with the input of the distributed magnetic core cable transformer, and two outputs of the distributed magnetic core cable transformer are respectively connected with the radio frequency tube VQ1 and the radio frequency tube VQ 2; the radio frequency tube VQ1 is connected with the radio frequency tube VQ2 in series; the radio frequency tube VQ1 and the radio frequency tube VQ2 are respectively connected with two inputs of the synthetic magnetic core cable transformer; the output of the synthetic magnetic core cable transformer is connected with the section selection switch.
The final stage amplifying unit of the amplifying circuit is matched with two radio frequency tubes through the distributed magnetic core cable transformer and the synthesized magnetic core cable transformer, so that the total power consumption of the circuit is effectively reduced, and the efficiency of the circuit is improved. For example, the present invention employs 4: 1 distributed core and composite core cable transformers; when the rated power is 105W, the final-stage radio frequency tube outputs 110W, the efficiency is more than or equal to 83 percent, namely the power consumption is about 133W; the power consumption of the push-stage amplification unit is about 5W; the rest power consumption is about 3W; therefore, when the whole machine outputs 105W, the total power consumption is about 141W, and the total efficiency is more than or equal to 74 percent.
Preferably, the transceiver switch circuit is connected with two drive circuits with the same structure; when the circuit works, the two driving circuits output opposite driving signals. The invention adopts two drive circuits with the same structure and opposite output to drive the transceiving switch circuit, thereby effectively reducing the switching time of the transceiving switch circuit and accelerating the response speed of the switch.
Preferably, the transceiver switch circuit includes a capacitor C404, a diode D403, and a capacitor C403, which are connected in sequence; wherein the capacitor C404 is connected with the section selecting switch; the capacitor C403 is connected with the antenna port; the junction of the capacitor C403 and the diode D403 is connected with the receiving port through a diode D404 and a capacitor C402 which are connected in series; the junction of the capacitor C403 and the diode D403 is also grounded through an inductor L404 and a resistor R401; the junction of the capacitor C404 and the diode D403 is connected with the emission control end of the driving circuit through the inductor L403; the emission control end of the driving circuit is grounded through a capacitor C401; the junction of the capacitor C402 and the diode D404 is connected with the receiving control end of the driving circuit through an inductor L401; the receiving control terminal of the driving circuit is grounded through a capacitor C405.
Preferably, the device further comprises a fixed-coupling detector circuit; the fixed coupling detection circuit is connected with the connection position of the section selection switch and the receiving and transmitting switch circuit.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention adds a pulse width duty ratio protection circuit, integrates and analyzes the current value of a power supply module collected by a current detector, and outputs a shutdown signal to stop the work of a radio frequency device of an amplifying circuit and close the power amplification function when the pulse width or the duty ratio is larger than a set value; after the heat is released, a radio frequency device is started to start a power amplifier, so that pulse width duty ratio protection is realized; the pulse width duty cycle protection can avoid burning out of the radio frequency device due to overheating of the pulse width or the duty cycle, and improve the working reliability of the circuit;
2. the final stage amplifying unit of the amplifying circuit is matched with two radio frequency tubes through the distributed magnetic core cable transformer and the synthesized magnetic core cable transformer, so that the total power consumption of the circuit is effectively reduced, and the efficiency of the circuit is improved.
Drawings
FIG. 1 is a block diagram of the short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of the present invention;
FIG. 2 is a schematic circuit diagram of an amplifying circuit in the short-wave radio frequency communication pulse width duty cycle protection transceiving circuit of the present invention;
FIG. 3 is a schematic circuit diagram of a pulse width duty cycle protection circuit in the short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of the present invention;
FIG. 4 is a schematic circuit diagram of a driving circuit in the short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of the present invention;
fig. 5 is a schematic circuit diagram of a transmit-receive switch circuit in the short-wave radio frequency communication pulse width duty cycle protection transmit-receive circuit of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 to fig. 5, the short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of the present embodiment includes two paths of amplifying circuits, a section selecting switch, a transceiver switch circuit, a pulse width duty cycle protection circuit, and a power supply module for supplying power; the two paths of amplifying circuits are connected with the section selection switch so as to realize that one path of amplifying circuit is conducted and the other path of amplifying circuit is closed; the section selecting switch is connected with the receiving port or the antenna port through the receiving-transmitting switch circuit;
the input end of the pulse width duty ratio protection circuit is connected with the power supply module through the current detection module so as to collect the total output current value of the power supply module; the pulse width duty ratio protection circuit is used for integrating and judging the current value acquired by the current detection module and outputting a shutdown signal when the pulse width or the duty ratio is greater than a set value; the output end of the pulse width duty ratio protection circuit is respectively connected with the radio frequency devices of the two paths of amplifying circuits through the PTT module.
The invention adds a pulse width duty ratio protection circuit, integrates and analyzes the current value of a power supply module collected by a current detector, and outputs a shutdown signal to stop the work of a radio frequency device of an amplifying circuit and close the power amplification function when the pulse width or the duty ratio is larger than a set value; after the heat is released, a radio frequency device is started to start a power amplifier, so that pulse width duty ratio protection is realized; the pulse width duty cycle protection can avoid the burnout of the radio frequency device caused by the overheating of the pulse width or the duty cycle, and improve the working reliability of the circuit.
The two paths of amplifying circuits respectively comprise a preceding stage amplifying unit, a pushing stage amplifying unit and a final stage amplifying unit which are connected in sequence; the pre-stage amplification unit is connected with the signal input port, and the final-stage amplification unit is connected with the section selection switch. The pre-stage amplification unit and the push-stage amplification unit may employ the prior art.
The radio frequency device comprises a radio frequency amplification module U1 and a radio frequency tube; the radio frequency amplification module is positioned in the pre-stage amplification unit, and the radio frequency tube is positioned in the final-stage amplification unit.
The number of the radio frequency tubes of the final stage amplification unit is two, and the two radio frequency tubes are respectively a radio frequency tube VQ1 and a radio frequency tube VQ 2; the final amplifying unit also comprises a matched distributed magnetic core cable transformer and a matched synthesized magnetic core cable transformer;
the push-stage amplification unit is connected with the input of the distributed magnetic core cable transformer, and two outputs of the distributed magnetic core cable transformer are respectively connected with the radio frequency tube VQ1 and the radio frequency tube VQ 2; the radio frequency tube VQ1 is connected with the radio frequency tube VQ2 in series; the radio frequency tube VQ1 and the radio frequency tube VQ2 are respectively connected with two inputs of the synthetic magnetic core cable transformer; the output of the synthetic magnetic core cable transformer is connected with the section selection switch.
The final stage amplifying unit of the amplifying circuit is matched with two radio frequency tubes through the distributed magnetic core cable transformer and the synthesized magnetic core cable transformer, so that the total power consumption of the circuit is effectively reduced, and the efficiency of the circuit is improved. For example, the present invention employs 4: 1 distributed core and composite core cable transformers; when the rated power is 105W, the final-stage radio frequency tube outputs 110W, the efficiency is more than or equal to 83 percent, namely the power consumption is about 133W; the power consumption of the push-stage amplification unit is about 5W; the rest power consumption is about 3W; therefore, when the whole machine outputs 105W, the total power consumption is about 141W, and the total efficiency is more than or equal to 74 percent. The distributed core cable transformer and the synthetic core cable transformer may be comprised of baluns.
The receiving and transmitting switch circuit is connected with two driving circuits with the same structure; when the circuit works, the two driving circuits output opposite driving signals.
Specifically, each of the driving circuits includes a field effect transistor VQ301, a field effect transistor VQ302, and a field effect transistor VQ 303; the G pole of the field effect transistor VQ301 is connected with the D pole of the field effect transistor VQ302, and is connected with the D pole of the field effect transistor VQ301 through a resistor R301 and a resistor R302 which are connected in series, and is also connected with the D pole of the field effect transistor VQ303 through a diode D301 and an inductor L301 which are connected in parallel; the S pole of the field effect transistor VQ301 is connected with the D pole of the field effect transistor VQ303 and is grounded through a capacitor C301; the G pole of the field effect transistor VQ302 is connected with the G pole of the field effect transistor VQ303 through a resistor R303 and a resistor R304 which are connected in series; the S pole of the field effect transistor VQ302 is connected with the S pole of the field effect transistor VQ303 and is connected with +5V voltage; the junction of the resistor R301 and the resistor R302 is connected with-200V voltage.
In one path of driving circuit, the joint (RA) of a resistor R303 and a resistor R304 is connected with an external T/R control port through an integrated inverter, and the S pole of a field effect tube VQ301 is used as a receiving control end (VKG1) to be connected with a receiving and transmitting switch circuit; in the other drive circuit, the junction (RB) of the resistor R303 and the resistor R304 is connected with an external T/R control port through an integrated phase inverter, and the S pole of the field effect tube VQ301 is connected with a transmitting and receiving switch circuit as a transmitting control end (VKG 2).
In the driving circuit of the invention, RA and RB are respectively connected with an external T/R control port through an integrated non-inverting device and an integrated inverter, so that RA and RB signals are opposite.
The invention adopts two drive circuits with the same structure and opposite output to drive the transceiving switch circuit, thereby effectively reducing the switching time of the transceiving switch circuit and accelerating the response speed of the switch; the switching time of the transceiving switch circuit can be within 4 us.
The transceiving switch circuit comprises a capacitor C404, a diode D403 and a capacitor C403 which are connected in sequence; wherein the capacitor C404 is connected with the section selecting switch; the capacitor C403 is connected with the antenna port; the junction of the capacitor C403 and the diode D403 is connected with the receiving port through a diode D404 and a capacitor C402 which are connected in series; the junction of the capacitor C403 and the diode D403 is also grounded through an inductor L404 and a resistor R401; the junction of the capacitor C404 and the diode D403 is connected with the emission control end of the driving circuit through the inductor L403; the emission control end of the driving circuit is grounded through a capacitor C401; the junction of the capacitor C402 and the diode D404 is connected with the receiving control end of the driving circuit through an inductor L401; the receiving control terminal of the driving circuit is grounded through a capacitor C405.
The pulse width duty ratio protection circuit comprises a comparator integral module and a triode amplification module which are sequentially connected.
Specifically, the comparator integration block comprises a comparator a1, a comparator a2, a nand gate G1, and a nand gate G2; the triode amplifying module comprises a triode Q201.
The input end of the pulse width duty cycle protection circuit is connected with the positive input of a comparator A1, and the negative input of the comparator A1 is connected with a comparison voltage I (the voltage at the connection part of a resistor R203 and a resistor R204); the output end of the comparator A1 is connected with the negative pole input of the comparator A2 through a diode D201, the positive pole input of the comparator A2 is connected with a comparison voltage II (the voltage at the junction of a resistor R207 and a resistor R208), and the positive pole input of the comparator A2 is also connected with the output end of the comparator A2 through a resistor R209; the output end of the comparator A1 is also connected with the input end I of the NAND gate G2 through the NAND gate G1; the second input end of the NAND gate G2 is connected with the output end of the comparator A2, and the output end of the NAND gate G2 is connected with the negative input of the comparator A2 through a diode D202 and a resistor R205 which are connected in series; the negative pole input of the comparator A2 is connected with the output end of the comparator A2 through a resistor R206 and a diode D203 which are connected in series; the output end of the comparator A2 is connected with the PTT module through a triode Q201. The pulse width duty cycle protection circuit can effectively realize the pulse width duty cycle protection function.
The PTT module is connected to the rf amplifier module U1 of the pre-stage amplifier unit of the two-way amplifier circuit, and the rf tube VQ1 and the rf tube VQ2 of the final-stage amplifier unit (e.g., interface vg in fig. 2), respectively.
The transceiver circuit preferably further comprises a constant-coupling detector circuit; the fixed coupling detection circuit is connected with the connection position of the section selection switch and the receiving and transmitting switch circuit.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. The utility model provides a shortwave radio frequency communication pulsewidth duty cycle protection transceiver circuit which characterized in that: the power supply circuit comprises two paths of amplifying circuits, a section selecting switch, a transceiving switch circuit, a pulse width duty ratio protection circuit and a power supply module for supplying power; the two paths of amplifying circuits are connected with the section selection switch so as to realize that one path of amplifying circuit is conducted and the other path of amplifying circuit is closed; the section selection switch is respectively connected with the receiving port and the antenna port through a receiving-transmitting switch circuit so as to realize the switching of receiving and transmitting functions;
the input end of the pulse width duty ratio protection circuit is connected with the power supply module through the current detection module so as to collect the total output current value of the power supply module; the pulse width duty ratio protection circuit is used for integrating and judging the current value acquired by the current detection module and outputting a shutdown signal when the pulse width or the duty ratio is greater than a set value; and the output end of the pulse width duty cycle protection circuit is respectively connected with the radio frequency devices of the two paths of amplifying circuits through the PTT module.
2. The short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 1, characterized in that: the pulse width duty cycle protection circuit comprises a comparator integral module and a triode amplification module which are sequentially connected.
3. The short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 2, characterized in that: the comparator integration module comprises a comparator A1, a comparator A2, a NAND gate G1 and a NAND gate G2; the triode amplifying module comprises a triode Q201;
the input end of the pulse width duty cycle protection circuit is connected with the positive input of a comparator A1, and the negative input of the comparator A1 is connected with a first comparison voltage; the output end of the comparator A1 is connected with the negative input of the comparator A2 through a diode D201, the positive input of the comparator A2 is connected with a comparison voltage II, and the positive input of the comparator A2 is also connected with the output end of the comparator A2 through a resistor R209; the output end of the comparator A1 is also connected with the input end I of the NAND gate G2 through the NAND gate G1; the second input end of the NAND gate G2 is connected with the output end of the comparator A2, and the output end of the NAND gate G2 is connected with the negative input of the comparator A2 through a diode D202 and a resistor R205 which are connected in series; the negative pole input of the comparator A2 is connected with the output end of the comparator A2 through a resistor R206 and a diode D203 which are connected in series; the output end of the comparator A2 is connected with the PTT module through a triode Q201.
4. The short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 1, characterized in that: the two paths of amplifying circuits respectively comprise a preceding stage amplifying unit, a pushing stage amplifying unit and a final stage amplifying unit which are connected in sequence; the pre-stage amplification unit is connected with the signal input port, and the final-stage amplification unit is connected with the section selection switch.
5. The short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 4, characterized in that: the radio frequency device comprises a radio frequency amplification module U1 and a radio frequency tube; the radio frequency amplification module is positioned in the pre-stage amplification unit, and the radio frequency tube is positioned in the final-stage amplification unit.
6. The short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 5, characterized in that: the number of the radio frequency tubes of the final stage amplification unit is two, and the two radio frequency tubes are respectively a radio frequency tube VQ1 and a radio frequency tube VQ 2; the final amplifying unit also comprises a matched distributed magnetic core cable transformer and a matched synthesized magnetic core cable transformer;
the push-stage amplification unit is connected with the input of the distributed magnetic core cable transformer, and two outputs of the distributed magnetic core cable transformer are respectively connected with the radio frequency tube VQ1 and the radio frequency tube VQ 2; the radio frequency tube VQ1 is connected with the radio frequency tube VQ2 in series; the radio frequency tube VQ1 and the radio frequency tube VQ2 are respectively connected with two inputs of the synthetic magnetic core cable transformer; the output of the synthetic magnetic core cable transformer is connected with the section selection switch.
7. The short-wave radio frequency communication pulse width duty cycle protection transceiving circuit of any one of claims 1 to 6, wherein: the receiving and transmitting switch circuit is connected with two driving circuits with the same structure; when the circuit works, the two driving circuits output opposite driving signals.
8. The short-wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 7, characterized in that: the receiving and transmitting switch circuit comprises a capacitor C404, a diode D403 and a capacitor C403 which are connected in sequence; wherein the capacitor C404 is connected with the section selecting switch; the capacitor C403 is connected with the antenna port; the junction of the capacitor C403 and the diode D403 is connected with the receiving port through a diode D404 and a capacitor C402 which are connected in series; the junction of the capacitor C403 and the diode D403 is also grounded through an inductor L404 and a resistor R401; the junction of the capacitor C404 and the diode D403 is connected with the emission control end of the driving circuit through the inductor L403; the emission control end of the driving circuit is grounded through a capacitor C401; the junction of the capacitor C402 and the diode D404 is connected with the receiving control end of the driving circuit through an inductor L401; the receiving control terminal of the driving circuit is grounded through a capacitor C405.
9. The short-wave radio frequency communication pulse width duty cycle protection transceiving circuit of any one of claims 1 to 6, wherein: the device also comprises a fixed-coupling detection circuit; the fixed coupling detection circuit is connected with the connection position of the section selection switch and the receiving and transmitting switch circuit.
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| CN202011382842.XA CN112564717B (en) | 2020-12-01 | 2020-12-01 | Pulse width duty cycle protection transceiver circuit for short-wave radio frequency communication |
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| CN202011382842.XA CN112564717B (en) | 2020-12-01 | 2020-12-01 | Pulse width duty cycle protection transceiver circuit for short-wave radio frequency communication |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993014559A1 (en) * | 1992-01-21 | 1993-07-22 | Nartron Corporation | Pulse width modulation power circuit |
| US20130076444A1 (en) * | 2010-05-27 | 2013-03-28 | Kyocera Corporation | Amplification Circuit, Communication Device, and Transmission Device Using Amplification Circuit |
| US20150340942A1 (en) * | 2014-05-20 | 2015-11-26 | Huawei Technologies Co., Ltd. | Switching Mode Power Supply |
| WO2019062263A1 (en) * | 2017-09-27 | 2019-04-04 | 广州金升阳科技有限公司 | Control method for asymmetric half-bridge flyback circuit, and circuit |
-
2020
- 2020-12-01 CN CN202011382842.XA patent/CN112564717B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993014559A1 (en) * | 1992-01-21 | 1993-07-22 | Nartron Corporation | Pulse width modulation power circuit |
| US20130076444A1 (en) * | 2010-05-27 | 2013-03-28 | Kyocera Corporation | Amplification Circuit, Communication Device, and Transmission Device Using Amplification Circuit |
| US20150340942A1 (en) * | 2014-05-20 | 2015-11-26 | Huawei Technologies Co., Ltd. | Switching Mode Power Supply |
| WO2019062263A1 (en) * | 2017-09-27 | 2019-04-04 | 广州金升阳科技有限公司 | Control method for asymmetric half-bridge flyback circuit, and circuit |
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