CN212726975U - Remote control circuit and remote control device - Google Patents
Remote control circuit and remote control device Download PDFInfo
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- CN212726975U CN212726975U CN202021332524.8U CN202021332524U CN212726975U CN 212726975 U CN212726975 U CN 212726975U CN 202021332524 U CN202021332524 U CN 202021332524U CN 212726975 U CN212726975 U CN 212726975U
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Abstract
The utility model discloses a remote control circuit. In this scheme, CPU provides the frequency square wave of predetermineeing to the conversion module that charges, and then charges first electric capacity, and when CPU stopped to export the frequency square wave of predetermineeing, first electric capacity discharges to the module of bleeding. In the process of charging the first capacitor, when the voltage at the two ends of the first capacitor is increased and the voltage at the two ends of the first capacitor is greater than the conduction threshold value, the first switch is conducted, so that the controllable switch module is also conducted. Because the CPU needs to provide a preset frequency square wave for a certain time to be able to raise the voltage at the two ends of the first capacitor to the conduction threshold of the first switch, and the interference is usually irregular and is not likely to be a square wave, the interference basically does not cause a malfunction of the first switch, that is, a malfunction of the controllable switch module, and the anti-interference performance is very strong. The utility model also discloses a remote control unit has the same beneficial effect with above-mentioned remote control circuit.
Description
Technical Field
The utility model relates to an anti-interference field of remote control especially relates to a remote control circuit and remote control unit.
Background
With the development of electronic technology, remote control devices are widely used in industrial automation, information communication, environmental monitoring, and other fields. A remote control device generally includes a CPU (Central Processing Unit) and a remote control circuit, wherein the CPU outputs a control signal to the remote control circuit to control the remote control circuit to turn on or off, and the control signal of the remote control circuit is generally at a high level or a low level, for example: when the output end of the CPU outputs a high level, the remote control circuit is conducted; when the output end of the CPU outputs a low level, the remote control circuit is disconnected.
The control mode causes the output end of the CPU to be interfered, or causes the state of the output end of the CPU to be changed due to the design defect of software, and the high and low levels received by the remote control circuit are accidentally jumped, thereby causing the malfunction of the remote control circuit. In the prior art, a capacitor is usually arranged in a remote control circuit, and the influence of some spike signals on the remote control circuit is prevented in a capacitor filtering mode, but the capacitor filtering can only prevent the influence of some spike signals on the remote control circuit, has no effect on accidental jump of high and low levels, and has poor anti-interference performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a remote control circuit and remote control unit can receive the interference at CPU's output, or when the output state that causes CPU because the software design defect changes, can not cause the remote control circuit malfunction.
In order to solve the technical problem, the utility model provides a remote control circuit is applied to remote control unit, remote control unit includes CPU, include:
a first capacitor with a first end grounded;
the charging conversion module is used for charging the first capacitor based on a preset frequency square wave output by the CPU, and a first switch is switched on when the voltage at two ends of the first capacitor is greater than a switching-on threshold value, otherwise, the first switch is switched off;
the bleeding module is connected with the first capacitor in parallel and used for discharging the preset frequency square wave when the CPU stops outputting the preset frequency square wave;
a controllable switch module;
the first switch is used for controlling the controllable switch module to be switched on when the first switch is switched on, or controlling the controllable switch module to be switched off when the first switch is not switched on;
and the second end of the second resistor is connected with the first end of the first capacitor.
Preferably, the first switch is a first NPN type triode, wherein an emitter of the first NPN type triode is used as a first end of the first switch, a collector of the first NPN type triode is used as a second end of the first switch, and a base of the first NPN type triode is used as a control end of the first switch.
Preferably, the controllable switch module comprises:
a relay;
the power amplification module is used for performing power amplification on current on the collector electrode of the first NPN type triode so as to electrify the coil of the relay;
the follow current module is used for discharging the CPU when the CPU stops outputting the square wave with the preset frequency so as to ensure that a coil of the relay is de-energized;
and the second end of the coil of the relay is connected with a first power supply.
Preferably, the power amplifying module includes:
a third resistor, one end of which is connected with the collector of the first NPN type triode;
the emitter is connected with a second power supply, and the base is connected with a PNP type triode connected with the other end of the third resistor;
a fourth resistor, one end of which is connected with the collector of the first triode;
and the emitter is grounded, the collector is connected with the first end of the relay, and the base is connected with the other end of the fourth resistor.
Preferably, the controllable switch module further comprises:
and the current limiting resistor is arranged between the second end of the coil of the relay and the first power supply.
Preferably, the freewheel module is a first diode.
Preferably, the bleeding module is a first resistor.
Preferably, the charge conversion module includes:
the first end of the second capacitor is connected with the output end of the CPU;
a second diode having a cathode connected to a second end of the second capacitor, and an anode of the second diode serving as an output terminal of the charge conversion module;
and the negative electrode of the third diode is grounded, and the positive electrode of the third diode is respectively connected with the second end of the second capacitor and the negative electrode of the second diode.
In order to solve the above problem, the utility model also provides a remote control unit, including CPU, still include as above-mentioned remote control circuit.
The utility model provides a remote control circuit is applied to remote control unit, and remote control unit includes CPU. This scheme has set up conversion module, first electric capacity, bleeder module, first switch, second resistance and controllable switch module that charges. Firstly, the CPU provides a preset frequency square wave to the charging conversion module, the preset frequency square wave charges the first capacitor through the charging conversion module, and when the CPU stops outputting the preset frequency square wave, the first capacitor discharges the discharge module. In the process of charging the first capacitor, when the voltage at two ends of the first capacitor is increased and the voltage at two ends of the first capacitor is greater than the conduction threshold value, the first switch is conducted, so that the controllable switch module is also conducted; otherwise, the first switch is turned off, and the controllable switch module is turned off. Because the CPU needs to provide a preset frequency square wave for a certain time to be able to raise the voltage at the two ends of the first capacitor to the conduction threshold of the first switch, and the interference is usually irregular and is not likely to be a square wave, the interference basically does not cause a malfunction of the first switch, that is, a malfunction of the controllable switch module, and the anti-interference performance is very strong.
The utility model also provides a remote control unit has the same beneficial effect with above-mentioned remote control circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a remote control device provided by the present invention;
fig. 2 is a schematic circuit diagram of a remote control circuit provided by the present invention.
Detailed Description
The core of the utility model is to provide a remote control circuit and remote control unit can receive the interference at CPU's output, or when the output state that causes CPU because the software design defect changes, can not cause the remote control circuit malfunction.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a remote control device according to the present invention.
The remote control circuit is applied to a remote control device, the remote control device including a CPU, the remote control circuit including:
a first capacitor C1 with a first terminal grounded;
the charging conversion module 1 is used for charging the first capacitor C1 based on a preset frequency square wave output by the CPU, and the first switch 4 is turned on when the voltage at the two ends of the first capacitor C1 is greater than the turn-on threshold, otherwise, the first switch 4 is turned off;
the bleeding module 2 is connected with the first capacitor C1 in parallel and used for discharging the preset frequency square wave when the CPU stops outputting the preset frequency square wave, and the first capacitor C1 discharges the preset frequency square wave;
a controllable switch module 3;
the first switch 4, of which the first end is connected with the second end of the first capacitor C1, the second end is connected with the input end of the controllable switch module 3, and the control end is connected with the first end of the second resistor R2, is used for controlling the controllable switch module 3 to be turned on when the first switch is turned on, or else, controlling the controllable switch module 3 to be turned off;
and a second resistor R2 having a second terminal connected to the first terminal of the first capacitor C1.
The applicant considers that the CPU controls the on and off of the remote control circuit by outputting a control signal to the remote control circuit, and when the output end of the CPU is interfered or the state of the output end of the CPU is changed due to software design defects, the high and low levels received by the remote control circuit are accidentally jumped, so that the remote control circuit malfunctions.
In this embodiment, a first capacitor C1 with a first end grounded, a controllable switch module 3, a charging module with an input end connected to the output end of the CPU and an output end connected to the second end of the first capacitor C1, a first resistor R1 connected in parallel with the first capacitor C1, a power electronic switch with a first end connected to the second end of the first capacitor C1 and a second end connected to the input end of the controllable switch module 3, and a second resistor R2 with a first end connected to the first end of the first capacitor C1 and the second end of the first resistor R1 and a second end connected to the control end of the power electronic switch are provided. Specifically, the CPU outputs a preset frequency square wave to the charging conversion module 1, the preset frequency square wave charges the first capacitor C1 after being converted by the charging conversion module 1, and the voltage across the first capacitor C1 continuously rises, wherein the first end of the first capacitor C1 is at a positive potential, the second end of the first capacitor C1 is at a negative potential, after a certain time (usually a short time), the voltage across the first capacitor C1 rises and is greater than the conduction threshold of the first switch 4, and when the voltage across the first capacitor C1 is greater than the conduction threshold of the first switch 4, the first switch 4 is turned on, so that the controllable switch module 3 is also turned on; when the voltage across the first capacitor C1 is not greater than the turn-on threshold of the first switch 4, the first switch 4 is turned off and the controllable switch module 3 is turned off.
Considering that the voltage across the first capacitor C1 cannot suddenly change after the CPU stops outputting the preset frequency square wave, the self-stored energy will continue to supply power to the circuit where the first switch 4 is located, and the first switch 4 will be turned off in a delayed manner. In this embodiment, the bleeder module 2 is provided, the first capacitor C1 discharges through the bleeder module 2 after the CPU stops outputting the preset frequency square wave, and when the voltage across the first capacitor C1 drops to the on threshold of the first switch 4, the first switch 4 is turned off.
In summary, the CPU needs to provide a preset frequency square wave for a certain time to enable the voltage across the first capacitor C1 to rise to the on-threshold of the first switch 4, and the interference is usually irregular and is not likely to be a square wave, so that the interference basically does not cause a malfunction of the first switch 4, that is, a malfunction of the controllable switch module 3, and the interference immunity is very strong.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a remote control circuit according to the present invention.
On the basis of the above-described embodiment:
as a preferred embodiment, the first switch 4 is a first NPN (Negative-Positive-Negative) transistor V1, wherein an emitter of the first NPN transistor V1 serves as the first end of the first switch 4, a collector of the first NPN transistor V1 serves as the second end of the first switch 4, and a base of the first NPN transistor V1 serves as the control end of the first switch 4.
In order to avoid the remote control circuit from generating extra voltage interference due to components, in the embodiment, the first switch 4 adopts the first NPN transistor V1 driven by current instead of adopting a voltage-driven switch such as a MOS transistor. On one hand, when the CPU charges the first capacitor C1 through the charging conversion module 1, a base current is generated on the second resistor R2; on the other hand, in the process that the preset frequency square wave charges the first capacitor C1 through the charging conversion module 1, the voltage at the two ends of the first capacitor C1 continuously increases, the first end of the first capacitor C1 is at a positive potential, the second end of the first capacitor C1 is at a negative potential, since the emitter of the first NPN transistor V1 is connected to the second end of the first capacitor C1, the base of the first NPN transistor V1 is grounded, the base voltage of the first NPN transistor V1 is higher than the emitter voltage, and when the voltage difference between the base voltage of the first NPN transistor V1 and the emitter voltage reaches the conduction threshold (e.g., 0.7V), the first NPN transistor V1 is conducted, so that the controllable switch module 3 is also conducted.
Therefore, the first NPN type triode V1 is used as the first switch 4, so that other voltage interference can be avoided, and the anti-interference performance of the remote control circuit is improved. In addition, the first NPN transistor V1 has the advantages of simple and reliable control.
Of course, the first switch 4 is not limited to the first NPN type transistor, and other switches driven by current may be used as the first switch 4, and the application is not limited thereto.
As a preferred embodiment, the controllable switch module 3 comprises:
a relay K;
the power amplification module is connected with the collector of the first NPN triode V1 at the input end and connected with the first end of the coil of the relay K at the output end, and is used for performing power amplification on the current on the collector of the first NPN triode V1 so as to electrify the coil of the relay K;
the follow current module 5 is connected with the first end of the relay K at the first end and connected with the second end of the relay K at the second end, and is used for discharging the CPU when the CPU stops outputting the preset frequency square wave so as to enable a coil of the relay K to lose power;
the second end of the coil of the relay K is connected with a first power supply.
Considering that the relay K needs to be driven by a large current, and the collector of the first NPN transistor V1 outputs a small current, in this embodiment, a power amplification module is disposed between the first end of the coil of the relay K and the collector of the first NPN transistor V1, the current output from the collector of the first NPN transistor V1 is power amplified by the power amplification module, the amplified current is input to the first end of the coil of the relay K, and the coil is powered on, so that the contact of the relay K is closed. The current output by the collector of the first NPN type triode V1 can be effectively amplified through the power amplification module, and then the relay K is driven to be closed.
Considering that the current on the coil of the relay K cannot change suddenly, when the CPU stops outputting the preset frequency square wave, reverse voltage is generated across the coil of the relay K, which may damage the circuit. In this embodiment, the follow current module 5 and the relay K are connected in parallel, when the CPU stops outputting the preset frequency square wave, the follow current module 5 and the coil of the relay K form a loop, and the coil of the relay K discharges the follow current module 5 to consume the current on the coil, so that the contact of the relay K is disconnected. When the CPU outputs the predetermined frequency square wave, the freewheel module 5 is turned off, and the current on the coil of the relay K does not flow to the freewheel module 5.
As a preferred embodiment, the power amplifying module includes:
a third resistor R3 having one end connected to the collector of the first NPN transistor V1;
a PNP (Positive-Negative-Positive) triode with an emitter connected with the second power supply and a base connected with the other end of the third resistor R3;
a fourth resistor R4 having one end connected to the collector of the first transistor;
and the emitter is grounded, the collector is connected with the first end of the relay K, and the base is connected with the other end of the fourth resistor R4.
Considering that the relay K is driven by current, the relay K can be driven only when the current input into the relay K reaches a certain value, and avoiding the remote control circuit from being interfered by voltage due to components. In this embodiment, one end of the third resistor R3 is connected to the collector of the first NPN transistor V1, the other end is connected to the base of the PNP transistor V2, the emitter of the PNP transistor V2 is connected to the second power supply, the collector is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the base of the second NPN transistor V3, the emitter of the second NPN transistor V3 is grounded, and the collector is connected to the first end of the relay K.
Specifically, a first current output by a collector of the first NPN transistor V1 is amplified for the first time by the PNP transistor V2 to obtain a second current, and the second current flows out from the collector of the PNP transistor V2, the second current is input to a base of the second NPN transistor V3 to be amplified for the second time to obtain a third current, and the third current flows from the collector of the second NPN transistor V3 through the first end of the coil of the relay K to electrify the coil of the relay K, so as to drive the contact of the relay K to be closed.
The third resistor R3 provides a base current with a proper size for the base of the PNP triode V2, so that the PNP triode V2 obtains a proper working point, and an emitter of the PNP triode V2 is in forward bias to play a role in amplifying current; the fourth resistor R4 provides a base current with a proper magnitude to the base of the second NPN transistor V3, so that the second NPN transistor V3 obtains a proper operating point, and the emitter of the second NPN transistor V3 is forward biased to amplify the current. Therefore, by arranging the PNP triode V2, the second NPN triode V3, the third resistor R3 and the fourth resistor R4, on the basis of realizing power amplification, additional voltage interference generated by components in the remote control circuit due to the power amplification module is also avoided.
It should be noted that the first power supply connected to the second end of the relay K and the second power supply connected to the emitter of the PNP transistor V2 provide positive voltages for different components, respectively, and both of the positive voltages are +3.3V when the voltage values are the same, for example, at this time, the emitter of the PNP transistor V2 and the second end of the relay K may be connected to the same power supply.
As a preferred embodiment, the controllable switch module 3 further comprises:
and a current limiting resistor R5 disposed between the second end of the coil of the relay K and the first power source.
Considering that the relay K has limitation on the maximum input current, if the input current is too large, the relay K can not work normally and even be burnt. In this embodiment, in order to control the magnitude of the current, a current limiting resistor R5 is provided between the second end of the coil of the relay K and the first power supply, so that the current intensity can be reduced, the magnitude of the current can be limited, and the relay K can be protected.
As a preferred embodiment, the freewheel module 5 is a first diode D1.
In order to avoid shunting of the coil of the relay K, a first diode D1 is provided as the freewheel module 5. Specifically, the anode of the first diode D1 is connected with the first end of the coil of the relay K, the cathode of the first diode D1 is connected with the second end of the coil of the relay K, when the CPU outputs the preset frequency square wave, the first diode D1 is cut off, and the current passes through the coil of the relay K; when the CPU stops outputting the predetermined frequency square wave, the first diode D1 is turned on, the first diode D1 forms a closed loop with the coil of the relay K, and the coil of the relay K discharges the first diode D1. Through setting up first diode D1 as afterflow module 5, avoided relay K's coil to be shunted, because the electric current drives relay K after the enlargies of power amplification module, relay K's coil is not shunted and has also saved the consumption of power amplification module.
In addition, the freewheel module 5 is not limited to the first diode, and may also be composed of a switch and a resistor, specifically, the switch and the resistor are connected in series and then connected in parallel to two ends of the coil of the relay K, when the CPU outputs the preset frequency square wave, the switch is turned off, the freewheel module 5 is turned off, and the current passes through the coil of the relay K; when the CPU stops outputting the preset frequency square waves, the switch is closed, the resistor and the coil of the relay K form a closed loop, and the coil of the relay K discharges the resistor. The specific arrangement of the freewheel module 5 is not particularly limited in this application.
As a preferred embodiment, the bleeding module 2 is a first resistor R1.
Considering that the first resistor R1 has the advantages of low cost and high production efficiency, in this embodiment, the first resistor R1 is selected as the bleeding module 2, the first resistor R1 is connected in parallel to two ends of the first capacitor C1, the first resistor R1 and the first capacitor C1 form a closed loop, and when the CPU stops outputting the preset frequency square wave, the first capacitor C1 discharges the first resistor R1. The cost is reduced by providing the first resistor R1 as the bleeder module 2.
In addition, the bleeding module 2 is not limited to the first resistor, and the present application is not limited thereto.
As a preferred embodiment, the charge conversion module 1 includes:
a second capacitor C2 having a first end connected to the output end of the CPU;
a second diode D2 having a cathode connected to the second end of the second capacitor C2, wherein an anode of the second diode D2 serves as an output terminal of the charge conversion module 1;
and a third diode D3 having a cathode grounded and an anode connected to the second terminal of the second capacitor C2 and the cathode of the second diode D2, respectively.
It is considered that the first capacitor C1 needs a predetermined frequency square wave supplied by the CPU to be converted and then charged so as to generate a negative potential at the second terminal of the first capacitor C1 (mainly due to the grounding of the first terminal of the first capacitor C1). In this embodiment, the CPU outputs a preset frequency square wave, for example, the preset frequency square wave is a fixed frequency square wave with a high level +5V and a low level 0V, when the preset frequency square wave is a high level (i.e., +5V), since the cathode of the third diode D3 is grounded, the third diode D3 is turned on, a current flows to the ground terminal through the second capacitor C2 and the third diode D3, and charges the second capacitor C2, at this time, the first end potential of the second capacitor C2 is +5V, and the second end potential of the second capacitor C2 is 0V; when the preset frequency square wave is at a low level, the first end of the second capacitor C2 becomes 0V, the potential of the second end is-5V, at this time, the third diode D3 is turned off, and the current flows from the ground end to the second end of the second capacitor C2 through the first capacitor C1 and the second diode D2 to charge the first capacitor C1, so that the second end of the first capacitor C1 is at a negative potential, that is, the emitter of the first NPN-type diode is at a negative potential, the above process is repeated, the voltage at the two ends of the first capacitor C1 is continuously increased, when the voltage difference at the two ends of the first capacitor C1 is increased to the turn-on threshold of the first switch 4, the first switch 4 is turned on, and the controllable switch module 3 is turned on.
The charging module charges the first capacitor C1 for a certain time by arranging the second diode D2 and the third diode D3, a negative potential is generated at the first end of the first capacitor C1, and the voltage at the two ends of the first capacitor C1 can be increased to the conduction threshold value of the first NPN diode only by the CPU needing to provide a preset frequency square wave for a certain time, while the interference is usually irregular and basically impossible to be a square wave, so that the interference basically does not cause a malfunction of the first NPN diode, that is, a malfunction of the controllable switch module 3, and the anti-interference performance is very strong.
The utility model also provides a remote control unit, including CPU, still include as above-mentioned remote control circuit.
To the utility model provides a pair of remote control unit's introduction please refer to above-mentioned utility model embodiment, the utility model discloses no longer describe here.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A remote control circuit is applied to a remote control device, the remote control device comprises a Central Processing Unit (CPU), and the remote control circuit is characterized by comprising:
a first capacitor with a first end grounded;
the charging conversion module is used for charging the first capacitor based on a preset frequency square wave output by the CPU, and a first switch is switched on when the voltage at two ends of the first capacitor is greater than a switching-on threshold value, otherwise, the first switch is switched off;
the bleeding module is connected with the first capacitor in parallel and used for discharging the preset frequency square wave when the CPU stops outputting the preset frequency square wave;
a controllable switch module;
the first switch is used for controlling the controllable switch module to be switched on when the first switch is switched on, or controlling the controllable switch module to be switched off when the first switch is not switched on;
and the second end of the second resistor is connected with the first end of the first capacitor.
2. The remote control circuit as claimed in claim 1, wherein the first switch is a first negative-positive-negative NPN transistor, wherein an emitter of the first NPN transistor serves as the first terminal of the first switch, a collector of the first NPN transistor serves as the second terminal of the first switch, and a base of the first NPN transistor serves as the control terminal of the first switch.
3. A remote control circuit as claimed in claim 2, wherein the controllable switch module comprises:
a relay;
the power amplification module is used for amplifying the power of the current on the collector of the first NPN type triode so as to enable the coil to be electrified;
the follow current module is used for discharging the CPU when the CPU stops outputting the square wave with the preset frequency so as to ensure that the coil loses power;
and the second end of the coil of the relay is connected with a first power supply.
4. A remote control circuit as claimed in claim 3, wherein the power amplification module comprises:
a third resistor, one end of which is connected with the collector of the first NPN type triode;
the emitting electrode is connected with a second power supply, and the base electrode is connected with the positive electrode-negative electrode-positive electrode PNP type triode connected with the other end of the third resistor;
a fourth resistor, one end of which is connected with the collector of the first triode;
and the emitter is grounded, the collector is connected with the first end of the relay, and the base is connected with the other end of the fourth resistor.
5. A remote control circuit as claimed in claim 3, wherein the controllable switch module further comprises:
and the current limiting resistor is arranged between the second end of the coil of the relay and the first power supply.
6. A remote control circuit as claimed in claim 3, characterized in that the freewheel module is a first diode.
7. The remote control circuit of claim 1, wherein the bleed-off module is a first resistor.
8. The remote control circuit according to any one of claims 1 to 7, wherein the charge conversion module comprises:
the first end of the second capacitor is connected with the output end of the CPU;
a second diode having a cathode connected to a second end of the second capacitor, and an anode of the second diode serving as an output terminal of the charge conversion module;
and the negative electrode of the third diode is grounded, and the positive electrode of the third diode is respectively connected with the second end of the second capacitor and the negative electrode of the second diode.
9. A remote control device comprising a CPU, characterized by further comprising a remote control circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021332524.8U CN212726975U (en) | 2020-07-08 | 2020-07-08 | Remote control circuit and remote control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021332524.8U CN212726975U (en) | 2020-07-08 | 2020-07-08 | Remote control circuit and remote control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212726975U true CN212726975U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021332524.8U Active CN212726975U (en) | 2020-07-08 | 2020-07-08 | Remote control circuit and remote control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212726975U (en) |
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2020
- 2020-07-08 CN CN202021332524.8U patent/CN212726975U/en active Active
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