CN212587012U - A remote control circuit and remote control - Google Patents
A remote control circuit and remote control Download PDFInfo
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- CN212587012U CN212587012U CN202021370205.6U CN202021370205U CN212587012U CN 212587012 U CN212587012 U CN 212587012U CN 202021370205 U CN202021370205 U CN 202021370205U CN 212587012 U CN212587012 U CN 212587012U
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Abstract
The utility model discloses a remote control circuit and remote controller, in this remote control circuit, switch circuit's first end is connected with key circuit's output, switch circuit's second end is connected with control circuit and radio frequency circuit's power end, switch circuit's third end is connected with self-locking circuit's first end, control circuit's input and key circuit's output are connected, control circuit's first output is connected with radio frequency circuit's input, control circuit's second output and self-locking circuit's second end are connected, self-locking circuit's third end and control circuit and radio frequency circuit's power end are connected. When the key circuit is triggered, the radio frequency circuit transmits a control signal under the control of the control circuit; and when the key circuit is not triggered within the preset time, the radio frequency circuit stops working. Through the mode, the electric energy consumption of the remote controller can be reduced while the control effect is ensured.
Description
Technical Field
The embodiment of the utility model provides a relate to remote control technical field, especially relate to a remote control circuit and remote controller.
Background
The remote controller is a control device commonly used in human daily life, and most electronic products are controlled by the remote controller. At present, in order to reduce the power consumption of the remote controller, the radio frequency circuit that uses low-power consumption in the remote controller carries out the transmission of control signal, but the inventor is realizing the utility model discloses an in-process discovery: the control signal that the radio frequency circuit of low-power consumption sent is more weak, can influence the control effect of remote controller, and then influences user experience, therefore, how to reduce the power consumption of remote controller when guaranteeing the control effect of remote controller is the problem that awaits the solution at present.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses a technical scheme be: there is provided a remote control circuit comprising:
the circuit comprises a key circuit, a switch circuit, a control circuit, a radio frequency circuit and a self-locking circuit;
the first end of the switch circuit is connected with the output end of the key circuit, the second end of the switch circuit is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit, the third end of the switch circuit is connected with the first end of the self-locking circuit, the input end of the control circuit is connected with the output end of the key circuit, the first output end of the control circuit is connected with the input end of the radio frequency circuit, the second output end of the control circuit is connected with the second end of the self-locking circuit, and the third end of the self-locking circuit is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit;
the key circuit is used for generating a remote control signal when being triggered;
the switch circuit is used for working in a conducting state according to the remote control signal so as to supply power to the control circuit and the radio frequency circuit and enable the control circuit and the radio frequency circuit to be in a working state;
the control circuit is used for outputting a first level signal to the self-locking circuit when the control circuit is in a working state so as to control the self-locking circuit to supply power to the control circuit and the radio frequency circuit and enable the control circuit and the radio frequency circuit to maintain the working state;
the control circuit is further configured to detect the remote control signal when the control circuit is in a working state, control the radio frequency circuit to transmit a control signal if the remote control signal is detected, and output a second level signal to the self-locking circuit to control the self-locking circuit to stop supplying power to the control circuit and the radio frequency circuit if the remote control signal is not detected within a preset time, so that the control circuit and the radio frequency circuit stop working, wherein the second level signal is opposite to the first level signal.
Optionally, the self-locking circuit comprises: a first sub-switching circuit and a second sub-switching circuit;
the first end of the first sub-switch circuit is connected with the second output end of the control circuit, the second end of the first sub-switch circuit is connected with the first end of the second sub-switch circuit, the second end of the second sub-switch circuit is connected with the third end of the switch circuit, and the third end of the second sub-switch circuit is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit;
the first sub-switch circuit and the second sub-switch circuit are used for working in a conducting state according to the first level signal;
the first sub-switch circuit and the second sub-switch circuit are used for working in an off state according to the second level signal.
Optionally, the first sub-switching circuit comprises: a first resistor and a first switch tube;
the first end of the first resistor is connected with the second output end of the control circuit, the second end of the first resistor is connected with the first end of the first switch tube, the second end of the first switch tube is connected with the first end of the second sub-switch circuit, and the third end of the first switch tube is grounded.
Optionally, the second sub-switching circuit comprises: the second resistor, the third resistor and the second switch tube;
the first end of the second resistor is connected with the second end of the first sub-switch circuit and the first end of the third resistor, the second end of the second resistor is connected with the first end of the second switch tube, the second end of the second switch tube is connected with the third end of the switch circuit and the second end of the third resistor, and the third end of the second switch tube is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit.
Optionally, the switching circuit comprises: the protection circuit, the third switching tube and the first power supply;
the first end of the protection circuit is connected with the output end of the key circuit, the second end of the protection circuit is connected with the first end of the third switching tube, the third end of the protection circuit is connected with the first power supply, the second end of the third switching tube is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit, and the third end of the third switching tube is connected with the first power supply and the second end of the second sub-switching circuit;
the protection circuit is used for protecting the third switching tube;
the third switching tube is used for working in a conducting state according to the remote control signal;
the first power supply is used for supplying power to the control circuit and the radio frequency circuit when the third switching tube works in a conducting state, so that the control circuit and the radio frequency circuit are in a working state;
the first power supply is further configured to supply power to the control circuit and the radio frequency circuit when the first sub-switch circuit and the second sub-switch circuit operate in a conducting state, so that the control circuit and the radio frequency circuit maintain an operating state.
Optionally, the protection circuit comprises: a fourth resistor and a fifth resistor;
the first end of the fourth resistor is connected with the output end of the key circuit and the first end of the fifth resistor, the second end of the fourth resistor is connected with the first end of the third switching tube, and the second end of the fifth resistor is connected with the first power supply, the third end of the third switching tube and the second end of the second sub-switching circuit.
Optionally, the second sub-switching circuit comprises: a first relay and a first diode;
the first end of the coil of the first relay is connected with the second end of the first sub-switch circuit and the anode of the first diode, the second end of the coil of the first relay is connected with the cathode of the first diode, the first contact of the first relay is connected with the cathode of the first diode and the third end of the switch circuit, and the second contact of the first relay is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit.
Optionally, the switching circuit comprises: the second relay, the second diode, the sixth resistor and the second power supply;
a first end of a coil of the second relay is connected with an anode of the second diode and a first end of the sixth resistor, a second end of the coil of the second relay is connected with a cathode of the second diode and the second power supply, a first contact of the second relay is connected with the second power supply and a second end of the second sub-switch circuit, a second contact of the second relay is connected with a power supply end of the control circuit and a power supply end of the radio frequency circuit, and a second end of the sixth resistor is connected with an output end of the key circuit;
the second relay is used for working in a conducting state according to the remote control signal;
the second power supply is used for supplying power to the control circuit and the radio frequency circuit when the second relay works in a conducting state so as to enable the control circuit and the radio frequency circuit to be in a working state;
the second power supply is further configured to supply power to the control circuit and the radio frequency circuit when the first sub-switch circuit and the second sub-switch circuit operate in a conducting state, so that the control circuit and the radio frequency circuit maintain an operating state.
Optionally, the key circuit comprises at least one key unit;
the first end of the at least one key unit is connected with the first end of the switch circuit, and the second end of the at least one key unit is grounded;
the key circuit is used for generating a remote control signal when at least one key unit is triggered.
For solving the technical problem, the utility model discloses a another technical scheme is: provided is a remote controller including: the remote control circuit described above.
The embodiment of the utility model provides a beneficial effect is: be different from prior art's condition, the embodiment of the utility model provides a remote control circuit and remote controller, this remote control circuit includes keying circuit, switch circuit, a control circuit, radio frequency circuit and self-locking circuit, switch circuit's first end is connected with keying circuit's output, switch circuit's second end is connected with control circuit's power end and radio frequency circuit's power end, switch circuit's third end is connected with self-locking circuit's first end, control circuit's input is connected with keying circuit's output, control circuit's first output is connected with radio frequency circuit's input, control circuit's second output and self-locking circuit's second end are connected, self-locking circuit's third end is connected with control circuit's power end and radio frequency circuit's power end. Wherein, the key circuit generates a remote control signal when being triggered; the switching circuit works in a conducting state according to the remote control signal to supply power to the control circuit and the radio frequency circuit, so that the control circuit and the radio frequency circuit are in a working state; when the control circuit is in a working state, the control circuit outputs a first level signal to the self-locking circuit to control the self-locking circuit to supply power to the control circuit and the radio frequency circuit, so that the control circuit and the radio frequency circuit are kept in the working state, meanwhile, when the control circuit is in the working state, the control circuit detects a remote control signal, if the remote control signal is detected, the radio frequency circuit is controlled to transmit the control signal, if the remote control signal is not detected within a preset time, a second level signal is output to the self-locking circuit to control the self-locking circuit to stop supplying power to the control circuit and the radio frequency circuit, so that the control circuit and the radio frequency circuit stop working. That is, when the key circuit is triggered, the radio frequency circuit transmits a control signal to realize a control function, and when the key circuit is not triggered within a preset time, the radio frequency circuit stops working.
Drawings
One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.
Fig. 1 is a schematic structural diagram of a remote control circuit according to an embodiment of the present invention;
fig. 2 is a circuit connection diagram of a remote control circuit according to an embodiment of the present invention;
fig. 3 is a circuit connection diagram of a remote control circuit according to a second embodiment of the present invention;
fig. 4 is a circuit connection diagram of a remote control circuit according to a third embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Please refer to fig. 1, which is a schematic structural diagram of a remote control circuit according to an embodiment of the present invention, the remote control circuit is applied to a remote controller, so that the remote controller can reduce power consumption while ensuring a control effect. Wherein, the remote controller is used for controlling electronic products, and the electronic products include but are not limited to: televisions, air conditioners, fans, etc.
Specifically, the remote control circuit includes: the key circuit 100, the switch circuit 200, the control circuit 300, the radio frequency circuit 400 and the self-locking circuit 500, the first end of the switch circuit 200 is connected with the output end of the key circuit 100, the second end of the switch circuit 200 is connected with the power supply end of the control circuit 300 and the power supply end of the radio frequency circuit 400, the third end of the switch circuit 200 is connected with the first end of the self-locking circuit 500, the input end of the control circuit 300 is connected with the output end of the key circuit 100, the first output end of the control circuit 300 is connected with the input end of the radio frequency circuit 400, the second output end of the control circuit 300 is connected with the second end of the self-locking circuit 500, the third end of the self-locking circuit 500 is connected with the power supply end of.
The key circuit 100 is used for generating a remote control signal when being triggered. That is, if the key circuit 100 is triggered, the key circuit 100 generates a remote control signal; if the key circuit 100 is not triggered, the key circuit 100 does not generate the remote control signal.
The switching circuit 200 is used to operate in a conducting state according to the remote control signal. That is, if the key circuit 100 generates a remote control signal, the switch circuit 200 operates in a conducting state; if the key circuit 100 does not generate the remote control signal, the switch circuit 200 operates in the off state. When the switch circuit 200 is in the on state, the switch circuit 200 supplies power to the control circuit 300 and the rf circuit 400, so that the control circuit 300 and the rf circuit 400 are in the on state.
The control circuit 300 is configured to output a first level signal to the self-locking circuit 500 when the self-locking circuit is in the working state, so as to control the self-locking circuit 500 to supply power to the control circuit 300 and the radio frequency circuit 400, so that the control circuit 300 and the radio frequency circuit 400 maintain the working state.
The control circuit 300 is also used to detect remote control signals when in an active state. If the remote control signal is detected, controlling the radio frequency circuit 400 to transmit a control signal; if the remote control signal is not detected within the preset time, a second level signal is output to the self-locking circuit 500 to control the self-locking circuit 500 to stop supplying power to the control circuit 300 and the radio frequency circuit 400, so that the control circuit 300 and the radio frequency circuit 400 stop working. Wherein, the control signal is used for controlling the electronic product, and the control signal is in response to the remote control signal generated by the key circuit 100.
The first level signal is opposite to the second level signal. In the embodiment of the present invention, any one of the high level signal and the low level signal is the first level signal, and the other is the second level signal. Specifically, when the first level signal is a high level signal, the second level signal is a low level signal; when the first level signal is a low level signal, the second level signal is a high level signal.
It can be understood that, in the remote control circuit, when the key circuit 100 is triggered, the key circuit 100 generates a remote control signal, so that the switch circuit 200 operates in a conducting state, at this time, the switch circuit 200 supplies power to the control circuit 300 and the radio frequency circuit 400, so that the control circuit 300 and the radio frequency circuit 400 operate in an operating state, at this time, the control circuit 300 outputs a first level signal to the self-locking circuit 500, so as to control the self-locking circuit 500 to supply power to the control circuit 300 and the radio frequency circuit 400, so that the control circuit 300 and the radio frequency circuit 400 maintain the operating state, and at the same time, the control circuit 300 can detect the remote control signal, and the control circuit 300 controls the radio frequency circuit 400 to transmit the control signal. Then, if the key circuit 100 is continuously triggered, the key circuit 100 continuously generates a remote control signal, the control circuit 300 continuously detects the remote control signal, and controls the radio frequency circuit 400 to transmit the control signal according to the detected remote control signal; if the key circuit 100 is not triggered, the key circuit 100 does not generate the remote control signal, so that the switch circuit 200 operates in the off state, and at this time, the control circuit 300 and the rf circuit 400 are maintained in a working state by the self-locking circuit 500, and if the key circuit 100 is not triggered for a predetermined time, the key circuit 100 does not generate the remote control signal for the preset time, so that the control circuit 300 does not detect the remote control signal for the preset time, at this time, the control circuit 300 outputs the second level signal to the self-locking circuit 500, to control the self-locking circuit 500 to stop supplying power to the control circuit 300 and the rf circuit 400, since the control circuit 300 and the rf circuit 400 are maintained in operation by the self-locking circuit 500 when the key circuit 100 does not generate the remote control signal, therefore, when the self-lock circuit 500 stops supplying power to the control circuit 300 and the rf circuit 400, the control circuit 300 and the rf circuit 400 stop operating.
Therefore, even if the radio frequency circuit with normal power consumption is used, the radio frequency circuit can stop working when the key circuit is not triggered within the preset time, and the power consumption is reduced, namely, the remote control circuit can reduce the power consumption of the remote controller while ensuring the control effect.
Further, referring to fig. 2, fig. 2 shows one implementation of the remote control circuit.
In the remote control circuit shown in fig. 2, the key circuit 100 includes a plurality of key units 110, the plurality of key units 110 are connected in parallel, and a first terminal of each key unit 110 is connected to a first terminal of the switch circuit 200, and a second terminal of each key unit 110 is grounded. When at least one key unit 110 is activated, the key circuit 100 generates a remote control signal.
Each key unit 110 includes a key SW and a seventh resistor R7, the key SW and the seventh resistor R7 are connected in series, and the seventh resistor R7 of each key unit 110 has different resistance values, so that different remote control signals are generated when different key units 110 are triggered, and the control circuit 300 can control the radio frequency circuit 400 to transmit different control signals according to different remote control signals.
For each key unit 110, if the key SW of the key unit 110 is pressed, it indicates that the key unit 110 is activated.
It will be appreciated that in some alternative embodiments, the key circuit 100 may include only one key element 110, with a first terminal of the key element 110 connected to a first terminal of the switch circuit 200 and a second terminal of the key element 110 connected to ground.
The switch circuit 200 includes a protection circuit 210, a third switch tube Q3 and a first power supply, a first end of the protection circuit 210 is connected to an output end of the key circuit 100, a second end of the protection circuit 210 is connected to a first end of the third switch tube Q3, a third end of the protection circuit 210 is connected to the first power supply, a second end of the third switch tube Q3 is connected to a power supply end of the control circuit 300 and a power supply end of the rf circuit 400, and a third end of the third switch tube Q3 is connected to the first power supply and a first end of the self-locking circuit 500. The first terminal of the protection circuit 210 is connected to the output terminal of the key circuit 100, that is, the first terminal of the protection circuit 210 is connected to the first terminal of the key unit 110.
The protection circuit 210 is used to protect the third switch tube Q3 to prevent the third switch tube Q3 from being damaged by excessive current.
The third switch tube Q3 is used to operate in the conducting state according to the remote control signal. That is, if the key circuit 100 generates a remote control signal, the third transistor Q3 is operated in an on state, and if the key circuit 100 does not generate a remote control signal, the third transistor Q3 is operated in an off state. Any remote control signal generated by the key circuit 100 can make the third switching tube Q3 work in a conducting state.
The first power supply is used for supplying power to the control circuit 300 and the rf circuit 400 when the third switching transistor Q3 operates in a conducting state, so that the control circuit 300 and the rf circuit 400 are in an operating state.
Based on the above, the first end of the third switching tube Q3 is the base of the PNP triode, the second end of the third switching tube Q3 is the collector of the PNP triode, and the third end of the third switching tube Q3 is the emitter of the PNP triode.
The protection circuit 210 includes a fourth resistor R4 and a fifth resistor R5, a first end of the fourth resistor R4 is connected to the output terminal of the key circuit 100 and a first end of the fifth resistor R5, a second end of the fourth resistor R4 is connected to a first end of the third switch Q3, and a second end of the fifth resistor R5 is connected to the first power supply, a third end of the third switch Q3, and a first end of the self-locking circuit 500. The first terminal of the fourth resistor R4 is connected to the output terminal of the key circuit 100, i.e., the first terminal of the fourth resistor R4 is connected to the first terminal of the key unit 110.
The control circuit 300 includes a controller U1, the power source VCC of the controller U1 is connected to the second terminal of the switch circuit 200 and the power source of the rf circuit 400, the input AIN0 of the controller U1 is connected to the output terminal of the key circuit 100, the first output terminal (DAT and CLK) of the controller U1 is connected to the input terminal of the rf circuit 400, the second output terminal P10 of the controller U1 is connected to the second terminal of the self-locking circuit 500, and the ground terminal of the controller U1 is grounded. The power supply terminal VCC of the controller U1 is connected to the second terminal of the switch circuit 200, that is, the power supply terminal VCC of the controller U1 is connected to the second terminal of the third switch transistor Q3; the input terminal AIN0 of the controller U1 is connected to the output terminal of the key circuit 100, i.e., the input terminal AIN0 of the controller U1 is connected to the first terminal of the key unit 110.
The controller U1 is configured to output a first level signal to the self-locking circuit 500 through the second output terminal P10 when the controller U1 is in an operating state, so as to control the self-locking circuit 500 to supply power to the power terminal VCC of the controller U1 and the power terminal VCC of the rf circuit 400, so that the controller U1 and the rf circuit 400 maintain the operating state; the controller U1 is further configured to detect a remote control signal through the input terminal AIN0 when the controller U1 is in an operating state, control the rf circuit 400 to transmit a control signal through the first output terminals (DAT and CLK) if the remote control signal is detected, and output a second level signal to the self-locking circuit 500 through the second output terminal P10 if the remote control signal is not detected within a preset time, so as to control the self-locking circuit 500 to stop supplying power to the power terminal VCC of the controller U1 and the power terminal of the rf circuit 400, so that the controller U1 and the rf circuit 400 stop operating.
The controller U1 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a single chip microcomputer, etc. Preferably, in the embodiment of the present invention, the controller U1 is a single chip microcomputer.
The rf circuit 400 includes an rf chip U2, a power source VCC of the rf chip U2 is connected to the second terminal of the switch circuit 200 and the power source of the control circuit 300, input terminals (DAT and CLK) of the rf chip U2 are connected to a first output terminal of the control circuit 300, an output terminal ANT of the rf chip U2 is used for connecting an antenna to transmit a control signal, and a ground terminal of the rf chip U2 is grounded. The power supply terminal VCC of the rf chip U2 is connected to the second terminal of the switch circuit 200 and the power supply terminal of the control circuit 300, that is, the power supply terminal VCC of the rf chip U2 is connected to the second terminal of the third switch transistor Q3 and the power supply terminal VCC of the controller U1; the input terminals (DAT and CLK) of the radio frequency chip U2 are connected to the first output terminal of the control circuit 300, that is, the input terminals (DAT and CLK) of the radio frequency chip U2 are connected to the first output terminals (DAT and CLK) of the controller U1, specifically, the DAT terminal of the radio frequency chip U2 is connected to the DAT terminal of the controller U1, and the CLK terminal of the radio frequency chip U2 is connected to the CLK terminal of the controller U1.
The rf chip U2 is used for transmitting a control signal through an antenna connected to the output terminal ANT under the control of the control circuit 300.
The rf chip U2 is a non-low power chip.
The self-locking circuit 500 includes a first sub-switch circuit 510 and a second sub-switch circuit 520, wherein a first terminal of the first sub-switch circuit 510 is connected to a second output terminal of the control circuit 300, a second terminal of the first sub-switch circuit 510 is connected to a first terminal of the second sub-switch circuit 520, a second terminal of the second sub-switch circuit 520 is connected to a third terminal of the switch circuit 200, and a third terminal of the second sub-switch circuit 520 is connected to a power source terminal of the control circuit 300 and a power source terminal of the rf circuit 400. The first terminal of the first sub-switch circuit 510 is connected to the second output terminal of the control circuit 300, that is, the first terminal of the first sub-switch circuit 510 is connected to the second output terminal P10 of the controller U1; the second terminal of the second sub-switch circuit 520 is connected to the third terminal of the switch circuit 200, that is, the second terminal of the second sub-switch circuit 520 is connected to the second terminal of the fifth resistor R5, the third terminal of the third switch Q3 and the first power supply; the third terminal of the second sub-switch circuit 520 is connected to the power supply terminal of the control circuit 300 and the power supply terminal of the rf circuit 400, i.e. the third terminal of the second sub-switch circuit 520 is connected to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the rf chip U2.
The first sub-switch circuit 510 and the second sub-switch circuit 520 are operated in a conducting state when the control circuit 300 outputs a first level signal; the first sub-switch circuit 510 and the second sub-switch circuit 520 operate in an off state when the control circuit 300 outputs the second level signal.
When the first sub-switch circuit 510 and the second sub-switch circuit 520 are operated in the on state, the first power supply supplies power to the control circuit 300 and the rf circuit 400 through the second sub-switch circuit 520, so that the control circuit 300 and the rf circuit 400 maintain the operating state.
When the first sub-switch circuit 510 and the second sub-switch circuit 520 operate in the off state, the first power supply cannot supply power to the control circuit 300 and the rf circuit 400 through the second sub-switch circuit 520, so that the control circuit 300 and the rf circuit 400 stop operating.
Specifically, the first sub-switching circuit 510 includes: the first resistor R1 and the first switch tube Q1, the first end of the first resistor R1 is connected with the second output end of the control circuit 300, the second end of the first resistor R1 is connected with the first end of the first switch tube Q1, the second end of the first switch tube Q1 is connected with the first end of the second sub-switch circuit 520, and the third end of the first switch tube Q1 is grounded. The first terminal of the first resistor R1 is connected to the second output terminal of the control circuit 300, i.e., the first terminal of the first resistor R1 is connected to the second output terminal P10 of the controller U1.
The first switch tube Q1 works in a conducting state when the control circuit 300 outputs a first level signal; the first switching tube Q1 is turned off when the control circuit 300 outputs the second level signal.
The first switch tube Q1 is an NPN type triode, based on which the first end of the first switch tube Q1 is a base electrode of the NPN type triode, the second end of the first switch tube Q1 is a collector electrode of the NPN type triode, and the third end of the first switch tube Q1 is an emitter electrode of the NPN type triode.
When the first switch tube Q1 is an NPN-type triode, the first switch tube Q1 can satisfy the conduction condition of the NPN-type triode when the base is at a high level and the emitter is at a low level, and the emitter of the first switch tube Q1 is grounded, and the first switch tube Q1 works in a conduction state when the control circuit 300 outputs the first level signal, therefore, in an embodiment of the present invention, the first level signal is a high level signal and the second level signal is a low level signal.
The second sub-switch circuit 520 includes: a second resistor R2, a third resistor R3 and a second switch Q2, wherein a first end of the second resistor R2 is connected to a second end of the first sub-switch circuit 510 and a first end of the third resistor R3, a second end of the second resistor R2 is connected to a first end of the second switch Q2, a second end of the second switch Q2 is connected to a third end of the switch circuit 200 and a second end of the third resistor R3, and a third end of the second switch Q2 is connected to a power supply terminal of the control circuit 300 and a power supply terminal of the rf circuit 400. A first end of the second resistor R2 is connected to the second end of the first sub-switch circuit 510, that is, a first end of the second resistor R2 is connected to the second end of the first switch transistor Q1; the second terminal of the second switch Q2 is connected to the third terminal of the switch circuit 200, that is, the second terminal of the second switch Q2 is connected to the second terminal of the fifth resistor R5, the third terminal of the third switch Q3 and the first power supply; the third terminal of the second switch Q2 is connected to the power supply terminal of the control circuit 300 and the power supply terminal of the rf circuit 400, i.e., the third terminal of the second switch Q2 is connected to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the rf chip U2.
The second switch tube Q2 is operated in a conducting state when the first switch tube Q1 is operated in a conducting state; the second switching tube Q2 is operated in the off state when the first switching tube Q1 is operated in the off state.
When the second switch Q2 is in the on state, the first power supply supplies power to the control circuit 300 and the rf circuit 400 through the second switch Q2, so that the control circuit 300 and the rf circuit 400 maintain the operating state.
When the second switch Q2 is in the off state, the first power supply cannot supply power to the control circuit 300 and the rf circuit 400 through the second switch Q2, so that the control circuit 300 and the rf circuit 400 stop operating.
The second switch tube Q2 is a PNP triode, and based on this, the first end of the second switch tube Q2 is the base of the PNP triode, the second end of the second switch tube Q2 is the emitter of the PNP triode, and the third end of the second switch tube Q2 is the collector of the PNP triode.
It is understood that, in the remote control circuit, when any one of the keys SW is activated, the key unit 110 where the activated key SW is located forms a loop with the fifth resistor R5 and the first power supply, so that the key circuit 100 generates a remote control signal; the remote control signal is input into the base electrode of the third switching tube Q3, so that the voltage drop between the base electrode and the emitting electrode of the third switching tube Q3 meets the conduction condition of the PNP type triode, and the third switching tube Q3 works in a conduction state; when the third switching tube Q3 works in a conducting state, the first power supply supplies power to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the radio frequency chip U2 through the third switching tube Q3, so that the controller U1 and the radio frequency chip U2 are in a working state, at this time, the second output terminal P10 of the controller U1 outputs a high-level signal to the base of the first switching tube Q1, so that the voltage drop between the base and the emitter of the first switching tube Q1 meets the conducting condition of the NPN-type triode, and the first switching tube Q1 works in a conducting state; when the first switching tube Q1 works in a conducting state, the base electrode of the second switching tube Q2 is grounded, and the emitter electrode is connected with the first power supply, so that the voltage drop between the base electrode and the emitter electrode of the second switching tube Q2 meets the conducting condition of the PNP type triode, and the second switching tube Q2 works in a conducting state; when the second switch tube Q2 operates in the on state, the first power supply supplies power to the power terminal VCC of the controller U1 and the power terminal VCC of the rf chip U2 through the second switch tube Q2, so that the controller U1 and the rf chip U2 maintain the operating state, meanwhile, the input terminal AIN0 of the controller U1 can detect a remote control signal, and the controller U1 controls the antenna of the rf chip U2 to transmit the control signal through the first output terminals (DAT and CLK). Then, if the key SW is not triggered within the preset time, the second output terminal P10 of the controller U1 outputs a low level signal to the base of the first switch Q1, at this time, the voltage drop between the base and the emitter of the first switch Q1 does not satisfy the on condition of the NPN type triode, the first switch Q1 is operated in the off state, so that the second switch Q2 is also operated in the off state, the first power supply cannot supply power to the power terminal VCC of the controller U1 and the power terminal VCC of the rf chip U2 through the second switch Q2, meanwhile, the first power supply cannot supply power to the power terminal VCC of the controller U1 and the power terminal VCC of the rf chip U2 through the third switch Q3, and the controller U1 and the rf chip U2 stop operating.
Further, referring to fig. 3, fig. 3 shows one implementation manner of a remote control circuit, which is different from the remote control circuit shown in fig. 2, in the remote control circuit shown in fig. 3, the control circuit 300 further includes: an eighth resistor R8.
The first terminal of the eighth resistor R8 is connected to the output terminal of the key circuit 100, and the second terminal of the eighth resistor R8 is connected to the input terminal AIN0 of the controller U1. The first terminal of the eighth resistor R8 is connected to the output terminal of the key circuit 100, i.e., the first terminal of the eighth resistor R8 is connected to the first terminal of the key unit 110.
The eighth resistor R8 is used to prevent the current input to the controller U1 from becoming too large.
Further, referring to fig. 4, fig. 4 shows one implementation manner of a remote control circuit, which is different from the remote control circuit shown in fig. 2, in the remote control circuit shown in fig. 4, the switch circuit 200 includes: a second relay K2, a second diode D2, a sixth resistor R6 and a second power supply, a first end of a coil of the second relay K2 is connected with an anode of the second diode D2 and a first end of a sixth resistor R6, a second end of a coil of the second relay K2 is connected with a cathode of the second diode D2 and the second power supply, a first contact of the second relay K2 is connected with the second power supply and a first end of the self-locking circuit 500, a second contact of the second relay K2 is connected with a power supply end of the control circuit 300 and a power supply end of the radio frequency circuit 400, and a second end of the sixth resistor R6 is connected with an output end of the key circuit 110. A second contact of the second relay K2 is connected to the power supply terminal of the control circuit 300 and the power supply terminal of the rf circuit 400, that is, a second contact of the second relay K2 is connected to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the rf chip U2; the second terminal of the sixth resistor R6 is connected to the output terminal of the key circuit 110, i.e., the second terminal of the sixth resistor R6 is connected to the first terminal of the key unit 110.
The second relay K2 is used to operate in a conducting state according to a remote control signal. That is, if the key circuit 100 generates the remote control signal, the second relay K2 operates in the on state, and if the key circuit 100 does not generate the remote control signal, the second relay K2 operates in the off state. Any remote control signal generated by the key circuit 100 can make the second relay K2 work in a conducting state.
The second power supply is used for supplying power to the control circuit 300 and the radio frequency circuit 400 when the second relay K2 operates in a conducting state, so that the control circuit 300 and the radio frequency circuit 400 are in an operating state.
The second sub-switch circuit 520 includes: a first relay K1 and a first diode D1, a first end of a coil of the first relay K1 is connected with a second end of the first sub-switch circuit 510 and a positive electrode of the first diode D1, a second end of a coil of the first relay K1 is connected with a negative electrode of the first diode D1, a first contact of the first relay K1 is connected with a negative electrode of the first diode D1 and a third end of the switch circuit 200, and a second contact of the first relay K1 is connected with a power supply terminal of the control circuit 300 and a power supply terminal of the rf circuit 400. A first coil end of the first relay K1 is connected to the second end of the first sub-switch circuit 510, that is, a first coil end of the first relay K1 is connected to the second end of the first switch tube Q1; the first contact of the first relay K1 is connected to the third terminal of the switch circuit 200, that is, the first contact of the first relay K1 is connected to the cathode of the second diode D2, the second terminal of the coil of the second relay K2, and the first contact of the second relay K2; the second contact of the first relay K1 is connected to the power supply terminal of the control circuit 300 and the power supply terminal of the rf circuit 400, i.e., the second contact of the first relay K1 is connected to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the rf chip U2.
The first relay K1 is operated in a conducting state when the first switch tube Q1 is operated in a conducting state; the first relay K1 operates in the off state when the first switching tube Q1 operates in the off state.
When the first relay K1 operates in the on state, the second power source supplies power to the control circuit 300 and the rf circuit 400 through the first relay K1, so that the control circuit 300 and the rf circuit 400 maintain the operating state.
When the first relay K1 operates in the off state, the second power source cannot supply power to the control circuit 300 and the radio frequency circuit 400 through the first relay K1, so that the control circuit 300 and the radio frequency circuit 400 stop operating.
It can be understood that, in the remote control circuit, when any one of the keys SW is activated, the key unit 110 where the activated key SW is located forms a loop with the sixth resistor R6, the coil of the second relay K2 and the second power supply, so that the key circuit 100 generates the remote control signal, and at the same time, the second relay K2 operates in a conducting state; when the second relay K2 works in a conducting state, the second power supply supplies power to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the radio frequency chip U2 through the second relay K2, so that the controller U1 and the radio frequency chip U2 are in a working state, at this time, the second output terminal P10 of the controller U1 outputs a high-level signal to the base of the first switching tube Q1, so that the voltage drop between the base and the emitter of the first switching tube Q1 meets the conducting condition of the NPN-type triode, and the first switching tube Q1 works in a conducting state; when the first switch tube Q1 works in a conducting state, the first switch tube Q1, the coil of the first relay K1 and the second power supply form a loop, so that the first relay K1 works in a conducting state; when the first relay K1 operates in the on state, the second power supply supplies power to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the rf chip U2 through the first relay K1, so that the controller U1 and the rf chip U2 maintain the operating state, meanwhile, the input terminal AIN0 of the controller U1 can detect the remote control signal, and the controller U1 controls the antenna of the rf chip U2 to transmit the control signal through the first output terminals (DAT and CLK). Then, if the key SW is not triggered within the preset time, the second output terminal P10 of the controller U1 outputs a low level signal to the base of the first switch tube Q1, at this time, the voltage drop between the base and the emitter of the first switch tube Q1 does not satisfy the on condition of the NPN type triode, the first switch tube Q1 is operated in the off state, so that the first switch tube Q1, the coil of the first relay K1, and the second power supply cannot form a loop, the first relay K1 is operated in the off state, the second power supply cannot supply power to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the rf chip U2 through the first relay K1, meanwhile, the second power supply cannot supply power to the power supply terminal VCC of the controller U1 and the power supply terminal VCC of the rf chip U2 through the second relay K2, and the controller U1 and the rf chip U2 stop operating.
In an embodiment of the present invention, a remote control circuit is provided, in which a radio frequency circuit transmits a control signal when a key circuit is triggered, so as to implement a control function; and when the key circuit is not triggered within the preset time, stopping working. Based on this, even if the radio frequency circuit with normal power consumption is used, the radio frequency circuit can stop working when the key circuit is not triggered within the preset time, so that the power consumption is reduced, namely, the power consumption of the remote controller can be reduced while the control effect is ensured.
It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A remote control circuit, comprising:
the circuit comprises a key circuit, a switch circuit, a control circuit, a radio frequency circuit and a self-locking circuit;
the first end of the switch circuit is connected with the output end of the key circuit, the second end of the switch circuit is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit, the third end of the switch circuit is connected with the first end of the self-locking circuit, the input end of the control circuit is connected with the output end of the key circuit, the first output end of the control circuit is connected with the input end of the radio frequency circuit, the second output end of the control circuit is connected with the second end of the self-locking circuit, and the third end of the self-locking circuit is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit;
the key circuit is used for generating a remote control signal when being triggered;
the switch circuit is used for working in a conducting state according to the remote control signal so as to supply power to the control circuit and the radio frequency circuit and enable the control circuit and the radio frequency circuit to be in a working state;
the control circuit is used for outputting a first level signal to the self-locking circuit when the control circuit is in a working state so as to control the self-locking circuit to supply power to the control circuit and the radio frequency circuit and enable the control circuit and the radio frequency circuit to maintain the working state;
the control circuit is further configured to detect the remote control signal when the control circuit is in a working state, control the radio frequency circuit to transmit a control signal if the remote control signal is detected, and output a second level signal to the self-locking circuit to control the self-locking circuit to stop supplying power to the control circuit and the radio frequency circuit if the remote control signal is not detected within a preset time, so that the control circuit and the radio frequency circuit stop working, wherein the second level signal is opposite to the first level signal.
2. The remote control circuit of claim 1, wherein the self-locking circuit comprises: a first sub-switching circuit and a second sub-switching circuit;
the first end of the first sub-switch circuit is connected with the second output end of the control circuit, the second end of the first sub-switch circuit is connected with the first end of the second sub-switch circuit, the second end of the second sub-switch circuit is connected with the third end of the switch circuit, and the third end of the second sub-switch circuit is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit;
the first sub-switch circuit and the second sub-switch circuit are used for working in a conducting state according to the first level signal;
the first sub-switch circuit and the second sub-switch circuit are used for working in an off state according to the second level signal.
3. The remote control circuit of claim 2, wherein the first sub-switching circuit comprises: a first resistor and a first switch tube;
the first end of the first resistor is connected with the second output end of the control circuit, the second end of the first resistor is connected with the first end of the first switch tube, the second end of the first switch tube is connected with the first end of the second sub-switch circuit, and the third end of the first switch tube is grounded.
4. The remote control circuit of claim 3, wherein the second sub-switching circuit comprises: the second resistor, the third resistor and the second switch tube;
the first end of the second resistor is connected with the second end of the first sub-switch circuit and the first end of the third resistor, the second end of the second resistor is connected with the first end of the second switch tube, the second end of the second switch tube is connected with the third end of the switch circuit and the second end of the third resistor, and the third end of the second switch tube is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit.
5. The remote control circuit of claim 4, wherein the switching circuit comprises: the protection circuit, the third switching tube and the first power supply;
the first end of the protection circuit is connected with the output end of the key circuit, the second end of the protection circuit is connected with the first end of the third switching tube, the third end of the protection circuit is connected with the first power supply, the second end of the third switching tube is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit, and the third end of the third switching tube is connected with the first power supply and the second end of the second sub-switching circuit;
the protection circuit is used for protecting the third switching tube;
the third switching tube is used for working in a conducting state according to the remote control signal;
the first power supply is used for supplying power to the control circuit and the radio frequency circuit when the third switching tube works in a conducting state, so that the control circuit and the radio frequency circuit are in a working state;
the first power supply is further configured to supply power to the control circuit and the radio frequency circuit when the first sub-switch circuit and the second sub-switch circuit operate in a conducting state, so that the control circuit and the radio frequency circuit maintain an operating state.
6. The remote control circuit of claim 5, wherein the protection circuit comprises: a fourth resistor and a fifth resistor;
the first end of the fourth resistor is connected with the output end of the key circuit and the first end of the fifth resistor, the second end of the fourth resistor is connected with the first end of the third switching tube, and the second end of the fifth resistor is connected with the first power supply, the third end of the third switching tube and the second end of the second sub-switching circuit.
7. The remote control circuit of claim 3, wherein the second sub-switching circuit comprises: a first relay and a first diode;
the first end of the coil of the first relay is connected with the second end of the first sub-switch circuit and the anode of the first diode, the second end of the coil of the first relay is connected with the cathode of the first diode, the first contact of the first relay is connected with the cathode of the first diode and the third end of the switch circuit, and the second contact of the first relay is connected with the power supply end of the control circuit and the power supply end of the radio frequency circuit.
8. The remote control circuit of claim 7, wherein the switching circuit comprises: the second relay, the second diode, the sixth resistor and the second power supply;
a first end of a coil of the second relay is connected with an anode of the second diode and a first end of the sixth resistor, a second end of the coil of the second relay is connected with a cathode of the second diode and the second power supply, a first contact of the second relay is connected with the second power supply and a second end of the second sub-switch circuit, a second contact of the second relay is connected with a power supply end of the control circuit and a power supply end of the radio frequency circuit, and a second end of the sixth resistor is connected with an output end of the key circuit;
the second relay is used for working in a conducting state according to the remote control signal;
the second power supply is used for supplying power to the control circuit and the radio frequency circuit when the second relay works in a conducting state so as to enable the control circuit and the radio frequency circuit to be in a working state;
the second power supply is further configured to supply power to the control circuit and the radio frequency circuit when the first sub-switch circuit and the second sub-switch circuit operate in a conducting state, so that the control circuit and the radio frequency circuit maintain an operating state.
9. A remote control circuit as claimed in any one of claims 1 to 8, characterized in that the key circuit comprises at least one key unit;
the first end of the at least one key unit is connected with the first end of the switch circuit, and the second end of the at least one key unit is grounded;
the key circuit is used for generating a remote control signal when at least one key unit is triggered.
10. A remote control comprising a remote control circuit as claimed in any one of claims 1 to 9.
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CN202021370205.6U CN212587012U (en) | 2020-07-09 | 2020-07-09 | A remote control circuit and remote control |
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CN202021370205.6U CN212587012U (en) | 2020-07-09 | 2020-07-09 | A remote control circuit and remote control |
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