CN112564717B - Pulse width duty cycle protection transceiver circuit for short-wave radio frequency communication - Google Patents
Pulse width duty cycle protection transceiver circuit for short-wave radio frequency communication Download PDFInfo
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- CN112564717B CN112564717B CN202011382842.XA CN202011382842A CN112564717B CN 112564717 B CN112564717 B CN 112564717B CN 202011382842 A CN202011382842 A CN 202011382842A CN 112564717 B CN112564717 B CN 112564717B
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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 acquire the output total current value of the power supply module; the pulse width duty cycle 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 cycle is larger 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 pulse width duty ratio protection, avoid burning out caused by overheat of the radio frequency device due to overlarge pulse width or 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 pulse width duty cycle protection transceiver circuit for short-wave radio frequency communication.
Background
The short wave radio frequency communication is a radio communication mode, mainly refers to signal communication in a frequency band 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, long-distance military and civil communication.
The condition of too high pulse width duty ratio can occur in the communication process or the product test process, and even the continuous wave working condition can occur; however, the existing short-wave communication transceiving circuit lacks of pulse width duty cycle protection; if the pulse width and the duty ratio are too high, overload operation of the radio frequency device can be caused, the radio frequency device can quickly generate heat, heat cannot be timely discharged, the radio frequency device is easy to burn out, and reliable operation of a circuit is not facilitated. Therefore, a short-wave radio frequency communication pulse width duty cycle protection transceiver circuit with pulse width duty cycle protection is needed to be designed.
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 transceiver circuit; the invention can realize the pulse width duty ratio protection, avoid burning out caused by overheat of the radio frequency device due to overlarge pulse width or duty ratio, and improve the working reliability of the circuit.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a pulse width duty cycle protection transceiver circuit for short wave radio frequency communication is characterized in that: the power supply circuit comprises two paths of amplifying circuits, a section selecting switch, a receiving and transmitting 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 selecting switch 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 and 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 acquire the output total current value of the power supply module; the pulse width duty cycle 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 cycle is larger 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 the power supply module acquired by the current detector, and outputs a shutdown signal when the pulse width or the duty ratio is larger than a set value so as to stop the work of the radio frequency device of the amplifying circuit and shut down the power amplification function; after the heat is released, starting a radio frequency device to start a power amplifier, so as to realize pulse width duty cycle protection; the pulse width duty cycle protection can avoid burning out caused by overheat of the radio frequency device due to overlarge pulse width or 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 sequentially connected.
Preferably, the comparator integration module includes 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 ratio protection circuit is connected with the positive input of the comparator A1, and the negative input of the comparator A1 is connected with the comparison voltage I; the output end of the comparator A1 is connected with the input of the cathode of the comparator A2 through a diode D201, the input of the anode of the comparator A2 is connected with a comparison voltage II, and the input of the anode 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 G1 and the input end I of the NAND gate G2; 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 input end of the negative electrode of the comparator A2 through a diode D202 and a resistor R205 which are connected in series; the negative 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 comprise a front-stage amplifying unit, a push-stage amplifying unit and a final-stage amplifying unit which are sequentially connected; the front stage amplifying unit is connected with the signal input port, and the final stage amplifying unit is connected with the section selecting switch.
Preferably, the radio frequency device comprises a radio frequency amplifying module U1 and a radio frequency tube; the radio frequency amplifying module is positioned in the front-stage amplifying unit, and the radio frequency tube is positioned in the final-stage amplifying unit.
Preferably, the number of the radio frequency tubes of the final amplifying unit is two, namely a radio frequency tube VQ1 and a radio frequency tube VQ2; the final stage amplifying unit also comprises a distributed magnetic core cable transformer and a composite magnetic core cable transformer which are matched;
the push-stage amplifying unit is connected with the input of the distributed magnetic core cable transformer, and the 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 and the radio frequency tube VQ2 are connected in series; the radio frequency tube VQ1 and the radio frequency tube VQ2 are respectively connected with two inputs of the composite magnetic core cable transformer; the output of the composite magnetic core cable transformer is connected with a section selecting 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 composite magnetic core cable transformer, so that the total power consumption of the circuit is effectively reduced, and the circuit efficiency is improved. For example, the invention employs 4:1 and a composite core cable transformer; when the rated power is 105W, the output of the final-stage radio-frequency tube is 110W, the efficiency is more than or equal to 83%, namely the power consumption is about 133W; the power consumption of the push-stage amplifying unit is about 5W; the rest power consumption is about 3W; therefore, the total power consumption is about 141W when the whole machine outputs 105W, and the total efficiency is more than or equal to 74 percent.
Preferably, the transceiver switch circuit is connected with two driving circuits with the same structure; in operation, the two driving circuits output opposite driving signals. The invention adopts two paths of driving circuits with the same structure and opposite outputs to drive the receiving and transmitting switch circuit, thereby effectively reducing the switching time of the receiving and transmitting switch circuit and accelerating the response speed of the switch.
Preferably, the transceiver 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 connection part 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 connection part of the capacitor C403 and the diode D403 is grounded through an inductor L404 and a resistor R401; the connection part 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 connection part 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 end of the driving circuit is grounded through a capacitor C405.
Preferably, the device further comprises a constant coupling detection circuit; the fixed coupling detection circuit is connected to the connection part of the section selecting 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 the power supply module acquired by the current detector, and outputs a shutdown signal when the pulse width or the duty ratio is larger than a set value so as to stop the work of the radio frequency device of the amplifying circuit and shut down the power amplification function; after the heat is released, starting a radio frequency device to start a power amplifier, so as to realize pulse width duty cycle protection; the pulse width duty cycle protection can avoid burning out caused by overheat of the radio frequency device due to overlarge pulse width or 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 composite magnetic core cable transformer, so that the total power consumption of the circuit is effectively reduced, and the circuit efficiency is improved.
Drawings
FIG. 1 is a block diagram of a pulse width duty cycle protection transceiver circuit for short wave radio frequency communication according to the present invention;
FIG. 2 is a schematic circuit diagram of an amplifying circuit in a short-wave radio frequency communication pulse width duty cycle protection transceiver circuit according to the present invention;
FIG. 3 is a schematic circuit diagram of a pulse width duty cycle protection circuit in a 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 a short-wave radio frequency communication pulse width duty cycle protection transceiver circuit according to the present invention;
Fig. 5 is a schematic circuit diagram of a transmit-receive switch circuit in a short wave radio frequency communication pulse width duty cycle protection transmit-receive circuit according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
Examples
As shown in fig. 1 to 5, the pulse width duty cycle protection transceiver circuit for short-wave radio frequency communication in this 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 selecting switch 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 and 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 acquire the output total current value of the power supply module; the pulse width duty cycle 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 cycle is larger 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 the power supply module acquired by the current detector, and outputs a shutdown signal when the pulse width or the duty ratio is larger than a set value so as to stop the work of the radio frequency device of the amplifying circuit and shut down the power amplification function; after the heat is released, starting a radio frequency device to start a power amplifier, so as to realize pulse width duty cycle protection; the pulse width duty cycle protection can avoid burning out caused by overheat of the radio frequency device due to overlarge pulse width or duty cycle, and improve the working reliability of the circuit.
The two paths of amplifying circuits comprise a front-stage amplifying unit, a push-stage amplifying unit and a final-stage amplifying unit which are sequentially connected; the front stage amplifying unit is connected with the signal input port, and the final stage amplifying unit is connected with the section selecting switch. The pre-stage amplifying unit and the push stage amplifying unit may be of the prior art.
The radio frequency device comprises a radio frequency amplifying module U1 and a radio frequency tube; the radio frequency amplifying module is positioned in the front-stage amplifying unit, and the radio frequency tube is positioned in the final-stage amplifying unit.
The two radio frequency tubes of the final amplifying unit are a radio frequency tube VQ1 and a radio frequency tube VQ2 respectively; the final stage amplifying unit also comprises a distributed magnetic core cable transformer and a composite magnetic core cable transformer which are matched;
The push-stage amplifying unit is connected with the input of the distributed magnetic core cable transformer, and the 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 and the radio frequency tube VQ2 are connected in series; the radio frequency tube VQ1 and the radio frequency tube VQ2 are respectively connected with two inputs of the composite magnetic core cable transformer; the output of the composite magnetic core cable transformer is connected with a section selecting 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 composite magnetic core cable transformer, so that the total power consumption of the circuit is effectively reduced, and the circuit efficiency is improved. For example, the invention employs 4:1 and a composite core cable transformer; when the rated power is 105W, the output of the final-stage radio-frequency tube is 110W, the efficiency is more than or equal to 83%, namely the power consumption is about 133W; the power consumption of the push-stage amplifying unit is about 5W; the rest power consumption is about 3W; therefore, the total power consumption is about 141W when the whole machine outputs 105W, and the total efficiency is more than or equal to 74 percent. The distributed core cable transformer and the composite core cable transformer may be composed of balun.
The receiving and transmitting switch circuit is connected with two paths of driving circuits with the same structure; in operation, the two driving circuits output opposite driving signals.
Specifically, the circuit driving circuits each include a field-effect transistor VQ301, a field-effect transistor VQ302, and a field-effect transistor VQ303; the G pole of the field effect tube VQ301 is connected with the D pole of the field effect tube VQ302, and is connected with the D pole of the field effect tube 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 tube VQ303 through a diode D301 and an inductor L301 which are connected in parallel; the S electrode of the field effect tube VQ301 is connected with the D electrode of the field effect tube 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 electrode of the field effect tube VQ302 is connected with the S electrode of the field effect tube VQ303 and is connected with +5V voltage; the junction of resistor R301 and resistor R302 is connected to a voltage of-200V.
In one path of driving circuit, a junction (RA) between a resistor R303 and a resistor R304 is connected with an external T/R control port through an integrated inverter, and an S pole of a field effect transistor VQ301 is used as a receiving control end (VKG 1) to be connected with a receiving and transmitting switch circuit; in the other path of driving circuit, a connection part (RB) between a resistor R303 and a resistor R304 is connected with an external T/R control port through an integrated phase shifter, and an S pole of a field effect transistor VQ301 is used as a transmitting control end (VKG 2) to be connected with a receiving and transmitting switch circuit.
In the driving circuit of the present invention, RA and RB are connected to the external T/R control port through the integrated in-phase and integrated inverter, respectively, so that the RA and RB signals are opposite.
The invention adopts two paths of driving circuits with the same structure and opposite outputs to drive the receiving and transmitting switch circuit, thereby effectively reducing the switching time of the receiving and transmitting switch circuit and accelerating the response speed of the switch; the switching time of the transceiver switch circuit can be within 4 us.
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 connection part 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 connection part of the capacitor C403 and the diode D403 is grounded through an inductor L404 and a resistor R401; the connection part 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 connection part 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 end of the driving circuit is grounded through a capacitor C405.
The pulse width duty ratio protection circuit comprises a comparator integrating module and a triode amplifying module which are sequentially connected.
Specifically, the comparator integration module includes a comparator A1, a comparator A2, a nand gate G1, and a nand gate G2; the triode amplification module comprises a triode Q201.
The input end of the pulse width duty ratio protection circuit is connected with the positive input of the comparator A1, and the negative input of the comparator A1 is connected with the comparison voltage I (the voltage at the connection position of the resistor R203 and the resistor R204); the output end of the comparator A1 is connected with the input of the cathode of the comparator A2 through a diode D201, the input of the anode of the comparator A2 is connected with a comparison voltage II (the voltage at the connection position of the resistor R207 and the resistor R208), and the input of the anode 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 G1 and the input end I of the NAND gate G2; 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 input end of the negative electrode of the comparator A2 through a diode D202 and a resistor R205 which are connected in series; the negative 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 respectively connected with a radio frequency amplifying module U1 of a front stage amplifying unit and a radio frequency tube VQ1 and a radio frequency tube VQ2 (such as an interface vg in fig. 2) of a final stage amplifying unit of the two-way amplifying circuit.
The transceiver circuit preferably further comprises a constant coupling detection circuit; the fixed coupling detection circuit is connected to the connection part of the section selecting switch and the receiving and transmitting switch circuit.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (6)
1. A pulse width duty cycle protection transceiver circuit for short wave radio frequency communication is characterized in that: the power supply circuit comprises two paths of amplifying circuits, a section selecting switch, a receiving and transmitting 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 selecting switch to realize that one path of amplifying circuit is conducted and the other path of amplifying circuit is closed; the section selecting switch is respectively connected with the receiving port and the antenna port through the receiving and 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 acquire the output total current value of the power supply module; the pulse width duty cycle 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 cycle is larger 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 pulse width duty ratio protection circuit comprises a comparator integrating module and a triode amplifying module which are sequentially connected;
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 ratio protection circuit is connected with the positive input of the comparator A1, and the negative input of the comparator A1 is connected with the comparison voltage I; the output end of the comparator A1 is connected with the input of the cathode of the comparator A2 through a diode D201, the input of the anode of the comparator A2 is connected with a comparison voltage II, and the input of the anode 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 G1 and the input end I of the NAND gate G2; 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 input end of the negative electrode of the comparator A2 through a diode D202 and a resistor R205 which are connected in series; the negative 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 two paths of amplifying circuits comprise a front-stage amplifying unit, a push-stage amplifying unit and a final-stage amplifying unit which are sequentially connected; the front stage amplifying unit is connected with the signal input port, and the final stage amplifying unit is connected with the section selecting switch.
2. The short wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 1, wherein: the radio frequency device comprises a radio frequency amplifying module U1 and a radio frequency tube; the radio frequency amplifying module is positioned in the front-stage amplifying unit, and the radio frequency tube is positioned in the final-stage amplifying unit.
3. The short wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 2, wherein: the two radio frequency tubes of the final amplification unit are respectively a radio frequency tube VQ1 and a radio frequency tube VQ2; the final stage amplifying unit also comprises a distributed magnetic core cable transformer and a composite magnetic core cable transformer which are matched;
the push-stage amplifying unit is connected with the input of the distributed magnetic core cable transformer, and the 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 and the radio frequency tube VQ2 are connected in series; the radio frequency tube VQ1 and the radio frequency tube VQ2 are respectively connected with two inputs of the composite magnetic core cable transformer; the output of the composite magnetic core cable transformer is connected with a section selecting switch.
4. A short wave radio frequency communication pulse width duty cycle protection transceiver circuit according to any one of claims 1 to 3, characterized in that: the receiving and transmitting switch circuit is connected with two paths of driving circuits with the same structure; in operation, the two driving circuits output opposite driving signals.
5. The short wave radio frequency communication pulse width duty cycle protection transceiver circuit of claim 4, wherein: 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 connection part 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 connection part of the capacitor C403 and the diode D403 is grounded through an inductor L404 and a resistor R401; the connection part 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 connection part 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 end of the driving circuit is grounded through a capacitor C405.
6. A short wave radio frequency communication pulse width duty cycle protection transceiver circuit according to any one of claims 1 to 3, characterized in that: the device also comprises a fixed coupling detection circuit; the fixed coupling detection circuit is connected to the connection part of the section selecting 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0576668A4 (en) * | 1992-01-21 | 1994-11-09 | Nartron Corp | Pulse width modulation power circuit. |
| JPWO2011148711A1 (en) * | 2010-05-27 | 2013-07-25 | 京セラ株式会社 | AMPLIFIER CIRCUIT, AND TRANSMITTER AND COMMUNICATION DEVICE USING THE SAME |
| CN103997206B (en) * | 2014-05-20 | 2017-04-12 | 华为技术有限公司 | Switching power source |
| CN107493016B (en) * | 2017-09-27 | 2019-04-19 | 广州金升阳科技有限公司 | A kind of control method and circuit of asymmetrical half-bridge circuit of reversed excitation |
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