CN216435165U - Key control circuit and remote controller - Google Patents
Key control circuit and remote controller Download PDFInfo
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- CN216435165U CN216435165U CN202122454416.9U CN202122454416U CN216435165U CN 216435165 U CN216435165 U CN 216435165U CN 202122454416 U CN202122454416 U CN 202122454416U CN 216435165 U CN216435165 U CN 216435165U
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Abstract
The application provides a key control circuit and a remote controller, when a key unit is switched on, the output voltage of the key unit controls the power supply unit to be switched on so as to provide power supply voltage for the control unit, the control unit starts to work, a first control signal is generated according to the received power supply voltage, the power supply unit is controlled to be switched on continuously within the preset time after being switched on through the first control signal, so that the control unit is continuously powered on and is in a normal working mode, corresponding control action is carried out within the preset time, and after the power supply unit is switched on for the preset time, the first control signal controls the power supply unit to be switched off, so that the power supply unit stops supplying power for the control unit, the control unit does not consume power, and the ultra-low power consumption performance requirement of the key control circuit is met.
Description
Technical Field
The application relates to the technical field of remote control, in particular to a key control circuit and a remote controller.
Background
With the rapid development of electronic technology, computer and sensor technology, remote control technology is widely applied and rapidly developed in various fields such as modern industrial and agricultural production, daily life and scientific research. In recent years, energy conservation and environmental protection have become common missions for human beings, and the requirements for low power consumption performance of remote controllers are increasing.
The existing remote controller with low power consumption is generally designed such that a main control chip in the remote controller is in a standby state when the remote controller is not in use, and the main control chip is in a normal working mode only when a wake-up signal is externally provided so as to process a corresponding signal.
However, the main control chip is in a standby state, but a certain standby power consumption is generated, so that the requirement of people on the ultra-low power consumption performance of the remote controller cannot be further met.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a key control circuit and a remote controller that can further reduce power consumption.
A key control circuit comprises a key unit, a power supply unit and a control unit;
the input end of the key unit receives a first voltage, the output end of the key unit is connected with the first input end of the power supply unit, and when the key unit is switched on, the key unit outputs the first voltage;
a second input end of the power supply unit receives a second voltage, an output end of the power supply unit is connected with a power supply end of the control unit, and when the power supply unit receives the first voltage, the power supply unit is conducted and outputs the second voltage to the control unit;
the first output end of the control unit is connected with the first input end of the power supply unit and used for outputting a first control signal for controlling the conduction time of the power supply unit.
In some embodiments, the key unit includes:
the first end of the key switch is connected with the input end of the key unit;
and the anode of the first diode is connected with the second end of the key switch, and the cathode of the first diode is connected with the output end of the key unit.
In some embodiments, the key unit further comprises:
and the first end of the first capacitor is connected with the second end of the key switch, and the second end of the first capacitor is grounded.
In some embodiments, the key control circuit further comprises:
and the anode of the second diode is connected with the first output end of the control unit, and the cathode of the second diode is connected with the first input end of the power supply unit.
In some embodiments, the power supply unit includes:
the first end of the first power supply switch is connected with the second input end of the power supply unit, and the second end of the first power supply switch is connected with the output end of the power supply unit;
and the first end of the second power supply switch is connected with the control end of the first power supply switch, the second end of the second power supply switch is grounded, and the control end of the second power supply switch is connected with the first input end of the power supply unit.
In some embodiments, further comprising:
the first end of the bleeder unit is connected with the power supply end of the control unit, and the second end of the bleeder unit is grounded; and the control end of the bleeder unit is connected with the first end of the second power supply switch.
In some embodiments, the bleed unit comprises:
the first end of the bleeder switch is the first end of the bleeder unit, the second end of the bleeder switch is the second end of the bleeder unit, and the control end of the bleeder switch is the control end of the bleeder unit.
In some embodiments, further comprising:
the sending unit is connected with the control unit;
and the control unit controls the sending unit to send a signal corresponding to the key switch according to the output voltage of the key unit.
In some embodiments, the number of the key units is two or more, each of the key units is connected to the first input terminal of the power supply unit, and each of the key units is connected to the corresponding input terminal of the control unit.
A remote controller comprises the key control circuit.
In the key control circuit and the remote controller provided by the application, when the key unit is switched on, the output voltage of the key unit controls the power supply unit to be switched on so as to provide power supply voltage for the control unit, the control unit starts to work, a first control signal is generated according to the received power supply voltage, the power supply unit is controlled to be switched on continuously within the preset time after being switched on through the first control signal, the control unit is enabled to be powered on continuously and is in a normal working mode, corresponding control action is carried out within the preset time, and after the power supply unit is switched on for the preset time, the first control signal controls the power supply unit to be switched off, so that the power supply unit stops supplying power for the control unit, the control unit does not consume power, and the ultra-low power consumption performance requirement of the key control circuit is met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of a key control circuit;
FIG. 2 is a schematic diagram of a key control circuit according to another embodiment;
FIG. 3 is a schematic diagram of a circuit structure of a plurality of key units according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood as "electrical connection", "communication connection", or the like if there is a transfer of electrical values or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
Fig. 1 is a schematic structural diagram of a key control circuit according to an embodiment of the present application, where the key control circuit includes a key unit 11, a power supply unit 2, and a control unit 3.
The input end of the KEY unit 11 receives the first voltage VBAT11, the output end is connected to the first input end KEY of the power supply unit 2, and when the KEY unit 11 is turned on, the KEY unit 11 outputs the first voltage VBAT11, that is, the voltage at the first input end KEY is the first voltage VBAT11 when the KEY unit 11 is turned on.
The second input terminal of the power supply unit 2 receives the second voltage VBAT2, the output terminal is connected to the power supply terminal VCC of the control unit 3, and when the first input terminal KEY of the power supply unit 2 receives the first voltage VBAT11 (when the KEY unit 11 is turned on), the power supply unit 2 is turned on, and outputs the second voltage VBAT2 to the power supply terminal VCC of the control unit 3, so as to provide the power supply voltage for the control unit 3.
The first output terminal of the control unit 3 is connected to the first input terminal KEY of the POWER supply unit 2, the control unit 3 starts to switch from the POWER-off state to the POWER supply state when receiving the second voltage VBAT2, that is, the control unit 3 starts to enter the normal operation mode when receiving the second voltage VBAT2, generates the first control signal POWER _ LOCK according to the second voltage VBAT2, and outputs the first control signal POWER _ LOCK to the first input terminal KEY of the POWER supply unit 2 through the first output terminal of the control unit 3. The first control signal POWER _ LOCK is used to control the on-time of the POWER supply unit 2 to be a preset time. That is, the POWER supply unit 2 is controlled by the first voltage VBAT11 received by the first input terminal KEY to start to be turned on when the KEY unit 11 is turned on, and the first control signal POWER _ LOCK is used to maintain the POWER supply unit 2 to be turned on continuously, and to control the POWER supply unit 2 to be turned off when the on-time lasts for the preset time, that is, the first control signal POWER _ LOCK controls the on-time of the POWER supply unit to be the preset time. Within a preset time, even if the KEY unit 11 is turned off, the voltage at the first input terminal KEY becomes 0, the POWER supply unit 2 continues to be turned on under the control of the first control signal POWER _ LOCK, until the on-time lasts for the preset time, the magnitude of the first control signal POWER _ LOCK is switched from the first value to the second value (the first value can control the POWER supply unit to be turned on, and the second value can control the POWER supply unit to be turned off), so as to control the POWER supply unit 2 to be turned off, thereby the POWER supply unit 2 stops providing the POWER supply voltage for the POWER supply terminal VCC, the control unit 3 enters the POWER-off state, at this time, the control unit does not consume POWER at all, and until the voltage at the first input terminal KEY rises again to the voltage that can control the POWER supply unit 2 to be turned on (for example, the first voltage VBAT11), the POWER supply unit 2 can supply POWER for the control unit 3 again, so as to restart the control unit 3 to enter the working mode.
Here, in the present application, the on state of the key unit 11 means that the electrical connection between the input terminal and the output terminal of the key unit 11 is on, and the off state of the key unit 11 means that the electrical connection between the input terminal and the output terminal of the key unit 11 is off. Furthermore, when the key unit 11 is turned on, the output terminal of the key unit 11 outputs the first voltage VBAT11 regardless of the turn-on voltage drop of the switching device between the input terminal and the output terminal of the key unit 11. In practical applications, when the key unit 11 is turned on, the output voltage of the key unit 11 is lower than the first voltage VBAT11 by a conduction voltage drop of the switching device between the input terminal and the output terminal of the key unit 11. And the conduction of the power supply unit 2 means that the second input terminal and the output terminal of the power supply unit 2 are conducted. Furthermore, when the power supply unit 2 is conducting, the output of the power supply unit 2 outputs the second voltage VBAT2 in the case that the conduction voltage drop of the switching device between the second input and the output of the power supply unit 2 is ignored. In practical applications, when the power supply unit 2 is turned on, the voltage at the output terminal of the power supply unit 2 is lower than the second voltage VBAT2 by a conduction voltage drop of the switching device between the second input terminal and the output terminal of the power supply unit. In addition, in the present application, the delay of the signal is ignored in describing the on timing or the off timing of each cell or each switching device. For example, when the key unit 11 is turned on, the key unit 11 outputs the first voltage VBAT11, and the power supply unit 2 is turned on, that is, in the case of ignoring the signal delay, the power supply unit 2 is considered to be turned on when the key unit 11 is turned on, and in the actual case, the power supply unit 2 is turned on again after the key unit 11 is turned on with a fixed delay.
In the key control circuit provided by the application, when the key unit is switched on, the output voltage of the key unit controls the power supply unit to be switched on so as to provide power supply voltage for the control unit, the control unit starts to work, a first control signal is generated according to the received power supply voltage, the power supply unit is controlled to be switched on continuously within the preset time after being switched on through the first control signal, the control unit is enabled to be powered on continuously and is in a normal working mode, corresponding control action is carried out within the preset time, and after the power supply unit is switched on for the preset time, the first control signal controls the power supply unit to be switched off, so that the power supply unit stops supplying power for the control unit, the control unit does not consume power, and the ultra-low power consumption performance requirement of the key control circuit is met.
With continued reference to FIG. 1, in some embodiments, the key unit 11 includes a key switch SW11 having a first terminal coupled to an input terminal of the key unit 11, i.e., the first terminal of the key switch SW11 is shown in this embodiment as an input terminal of the key unit 11, and a second terminal of the key switch SW11 is coupled to an output terminal of the key unit 11.
As shown in fig. 1, in some embodiments, the KEY unit 11 further includes a first diode D11, an anode terminal of the first diode D11 is connected to the second terminal of the KEY switch SW11, and a cathode terminal of the first diode D11 is connected to the first input terminal KEY of the power unit 2. In the present embodiment, the cathode of the first diode D11 is used as the output terminal of the KEY unit 11, and the KEY switch SW11 is connected to the first input terminal KEY through the first diode D11. The first diode D11 can prevent the voltage at the second terminal of the key switch SW11 from being interfered by other signals. The key unit 11 further includes a first capacitor C11 connected between the second terminal of the key switch SW11 and the ground terminal to ensure the stability of the voltage at the second terminal of the key switch SW 11. The key switch SW11 is turned on when pressed, and is turned off when the key switch SW11 is released from the pressing.
As shown in fig. 1, the power supply unit 2 includes a first power supply switch Q21 and a second power supply switch Q22. The first terminal of the first power supply switch Q21 is connected to the second input terminal of the power supply unit 2 to receive the second voltage VBAT2, and the second terminal is connected to the output terminal of the power supply unit 2, i.e. the second terminal of the first power supply switch Q21 is connected to the power supply terminal VCC of the control unit 3. The second supply switch Q22 has a first terminal connected to the control terminal of the first supply switch Q21 and a second terminal connected to ground. The control terminal of the second supply switch Q22 is connected to the first input terminal KEY of the power supply unit 2. When the KEY switch SW11 is pressed, the KEY switch SW11 is turned on, the voltage of the first input KEY is the first voltage VBAT11, the second power supply switch Q22 is turned on under the control of the first voltage VBAT11, since the first power supply switch Q21 is a low-level turn-on type switch in this embodiment, after the second supply switch Q22 is turned on, the voltage at the control terminal of the first supply switch Q21 is pulled low, thereby causing the first power switch Q21 to be turned on, the second power supply voltage VBAT2 is transmitted to the power supply terminal VCC of the control unit 3 through the first power switch Q21, to supply the control terminal 3 with a supply voltage, the value of the first control signal POWER _ LOCK output by the control unit 3 is a first value, the second power supply switch Q22 is controlled to be turned on continuously, so as to maintain the time of the power supply unit 2 providing the power supply voltage for the control unit 3 as the preset time, and the control unit 3 is maintained in the normal operation mode, so as to perform the corresponding control action. After a preset time, the value of the first control signal POWER _ LOCK is switched from the first value to the second value to control the second POWER supply switch Q22 to be turned off. When the second power supply switch Q22 is turned off, the first power supply switch Q21 is turned off, and the power supply unit 2 does not output the power supply voltage to the power supply terminal VCC of the control unit 3 any more, that is, the control unit 3 is powered off, so that the control unit 3 is in a state of consuming no power. After the preset time, if the first input KEY of the power supply unit 2 receives the voltage capable of turning on the second power supply switch Q22 again when the KEY switch is pressed, the first power supply switch Q21 is controlled to be turned on again, the power supply unit 2 resumes supplying power to the control unit 3, and the control unit 3 restarts to process corresponding KEY information.
Further, in the present embodiment, the first power supply switch Q21 is a low-level conduction switch. In other embodiments, the connection relationship between the first power supply switch Q21 and the second power supply switch Q22 is not limited to that shown in fig. 1, and the switch types of the two are not limited, as long as the two can be used together to realize the function of powering off the power supply unit after the power supply unit powers the control unit for the preset time according to the output voltage of the key unit and the first control signal output by the control unit. In addition, the first power supply switch and the second power supply switch are both transistors, for example, the first power supply switch is a MOSFET (metal oxide semiconductor field effect transistor), and the second power supply switch is a triode. The first terminal of the first power supply switch is one of a source terminal and a drain terminal, the second terminal is the other of the source terminal and the drain terminal, the first terminal of the second power supply switch is one of an emitter and a collector, and the second terminal is the other of the emitter and the collector.
In addition, as shown in fig. 1, the power supply unit 2 further includes a first power supply resistor R21 connected between the control terminal of the second power supply switch Q22 and the ground terminal to control the static voltage of the control terminal of the second power supply switch Q22 to 0, thereby preventing the second power supply switch Q22 from being triggered by mistake. The power supply unit 2 further includes a second power supply resistor R22 connected between the control terminal of the second power supply switch Q22 and the first input terminal KEY, a third power supply resistor R23 connected between the first terminal of the second power supply switch Q22 and the control terminal of the first power supply switch Q21, a fourth power supply resistor R24 connected between the first terminal of the second power supply switch Q22 and the second terminal of the first power supply switch Q21, a second capacitor C21 connected between the control terminal of the first power supply switch Q21 and the ground terminal, and a second capacitor C22 connected between the control terminal of the second power supply switch Q22 and the ground terminal.
Further, as shown in fig. 1, the key control circuit further includes a diode D31, an anode of the diode D31 is connected to the first output terminal of the control unit 3 to receive the first control signal POWER _ LOCK, and a cathode of the diode D31 is connected to the control terminal of the second POWER supply switch Q22.
Fig. 2 is a schematic structural diagram of a key control circuit according to another embodiment of the present application, in this embodiment, the key control circuit further includes a discharging unit 4 connected between a power supply terminal VCC and a ground terminal of the control unit 3, a first terminal of the discharging unit 4 is connected to the power supply terminal of the control unit, and a second terminal of the discharging unit 4 is grounded. The control terminal of the bleeding unit 4 is connected to the first terminal a of the second supply switch Q22. When the second power supply switch Q22 is turned on, the voltage at the first terminal a of the second power supply switch Q22 is pulled down to a voltage close to the ground, and then the bleeding unit 4 is turned off, and the bleeding unit 4 does not play a role of bleeding the voltage VCC at the power supply terminal of the control unit 3. When the second power supply switch Q22 is turned off, the first power supply switch Q21 is not yet completely turned off, and at this time, the voltage of the first end a of the second power supply switch Q22 is still higher, so that the bleeding unit 4 is turned on to bleed the voltage VCC at the power supply end of the control unit 3, and the control unit 3 rapidly enters a stop state to reduce power consumption.
As shown in fig. 2, the bleeding unit 4 includes a bleeding switch Q41 connected between the power supply terminal VCC and the ground terminal of the control unit 3. The turn-on and turn-off of the bleed switch Q41 is controlled by the voltage at the first terminal of the second supply switch Q22. The first end of the bleeding switch Q41 is used as the first end of the bleeding unit 4 to connect to the power supply terminal VCC, the second end of the bleeding switch Q41 is used as the second end of the bleeding unit 4 for grounding, and the control end of the bleeding switch Q41 is used as the control end of the bleeding unit 4 for connecting to the first end a of the second power supply switch Q22. In addition, as shown in fig. 2, the bleeder unit further includes a first bleeder resistor R41 and a second bleeder resistor R42. The first end of the bleeder switch Q41 is connected to the power supply terminal VCC of the control unit 3 through a first bleeder resistor R41, and the control terminal of the bleeder unit 4 is connected to the first end a of the second power supply switch Q22 through a second bleeder resistor R42.
With continued reference to fig. 2, in this embodiment, the key control circuit further comprises a transmitting unit 5 connected to the control unit 3. The first signal input terminal K11 of the control unit 3 is connected to the output terminal of the key unit 11 to control the transmission unit 5 to transmit a signal corresponding to the key switch SW11 according to the output voltage of the key unit 11. For example, when the key switch SW11 is pressed, the power supply unit 2 supplies power to the control unit 3 to activate the control unit 3, and after the key switch SW11 is pressed and released due to the action of the first capacitor C11 in the key unit 11, the voltage at the second end of the key switch SW11 can be maintained for a short period of time, during which the control unit 3 is activated to start working and recognizes the input signal of the first signal input terminal K11, and when it is recognized that the voltage input at the first signal input terminal K11 is the first voltage VBAT11, it is determined that the key switch SW11 is currently pressed, so as to output a corresponding control signal to the transmission unit 5 to control the transmission unit 5 to transmit a signal corresponding to the key switch SW 11.
In some embodiments, the key control circuit includes a plurality of key units, and the circuit of the plurality of key units is configured as shown in fig. 3. In fig. 3, only a plurality of key units are illustrated, and other components of the key control circuit are not shown. As shown in fig. 3, in the present embodiment, the key units in the control circuit include, in addition to the key unit 11, key units 12, 13, 14, 15, and 16 having the same structure as the key unit 11, wherein the key switches SW12, SW13, SW14, SW15, and SW16 in the key units 12, 13, 14, 15, and 16 respectively correspond to the key switch SW11 in the key unit 11, and the capacitors C12, C13, C14, C15, and C16 in the key units 12, 13, 14, 15, and 16 respectively correspond to the capacitor C11 in the key unit 11; the diodes D12, D13, D14, D15, D16 in the key units 12, 13, 14, 15, 16 correspond to the diode D11 in the key unit 11, respectively. Second ends of the key switches in the respective key units are respectively connected to corresponding input signal terminals K12, K13, K14, K15, and K16 in the control unit (K12, K13, K14, K15, K16, and K11, which are not shown in fig. 1 and 2). Voltages VBAT12, VBAT13, VBAT14, VBAT15, and VBAT16 in the key units 12, 13, 14, 15, and 16 correspond to VBAT1 in the key unit 11, respectively. The magnitude of VBAT1, VBAT12, VBAT13, VBAT14, VBAT15, VBAT16 are the same voltage in some embodiments, e.g., all 3V voltage. Further, in some embodiments, the first voltage VBAT11 and the second voltage VBAT2 are also the same voltage.
When the control unit is in a normal working mode, the control unit judges the current key unit which is pressed according to the voltages received by the terminals K11, K12, K13, K14, K15 and K16, so that the control unit controls the sending signal to send a signal corresponding to the corresponding key unit, and the controlled object of the key control circuit is controlled to execute corresponding action. The diodes in each key unit can prevent the electrical levels of the keys from interfering with each other, and ensure that the identification of the control unit 3 on the input signal corresponding to one key switch does not affect the identification on the input signals corresponding to other key switches when the key switch is pressed.
In addition, the application also provides a remote controller, the remote controller is provided with a plurality of keys which are arranged corresponding to the key units, and the keys corresponding to the key units can be functional keys or power-on and power-off keys, so that the remote controller only needs to be pressed once and can send corresponding functional instructions and power-on instructions, the remote controller is automatically powered off after the power-on preset time, the remote controller is in an ultra-low power consumption state of power-off, and the remote controller enters the power-on and working state again until the keys are pressed next time.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A key control circuit is characterized by comprising a key unit, a power supply unit and a control unit;
the input end of the key unit receives a first voltage, the output end of the key unit is connected with the first input end of the power supply unit, and when the key unit is switched on, the key unit outputs the first voltage;
a second input end of the power supply unit receives a second voltage, an output end of the power supply unit is connected with a power supply end of the control unit, and when the power supply unit receives the first voltage, the power supply unit is conducted and outputs the second voltage to the control unit;
the first output end of the control unit is connected with the first input end of the power supply unit and used for outputting a first control signal for controlling the conduction time of the power supply unit.
2. The key control circuit of claim 1, wherein the key unit comprises:
the first end of the key switch is connected with the input end of the key unit;
and the anode of the first diode is connected with the second end of the key switch, and the cathode of the first diode is connected with the output end of the key unit.
3. The key control circuit of claim 2, wherein the key unit further comprises:
and the first end of the first capacitor is connected with the second end of the key switch, and the second end of the first capacitor is grounded.
4. The key control circuit of claim 1, further comprising:
and the anode of the second diode is connected with the first output end of the control unit, and the cathode of the second diode is connected with the first input end of the power supply unit.
5. The key control circuit of claim 1, wherein the power supply unit comprises:
the first end of the first power supply switch is connected with the second input end of the power supply unit, and the second end of the first power supply switch is connected with the output end of the power supply unit;
and the first end of the second power supply switch is connected with the control end of the first power supply switch, the second end of the second power supply switch is grounded, and the control end of the second power supply switch is connected with the first input end of the power supply unit.
6. The key control circuit of claim 5, further comprising:
the first end of the bleeder unit is connected with the power supply end of the control unit, and the second end of the bleeder unit is grounded; and the control end of the bleeder unit is connected with the first end of the second power supply switch.
7. The key control circuit of claim 6, wherein the bleeding unit comprises
The first end of the bleeder switch is the first end of the bleeder unit, the second end of the bleeder switch is the second end of the bleeder unit, and the control end of the bleeder switch is the control end of the bleeder unit.
8. The key control circuit of claim 2, further comprising:
the sending unit is connected with the control unit;
and the control unit controls the sending unit to send a signal corresponding to the key switch according to the output voltage of the key unit.
9. The key control circuit according to any one of claims 1 to 8, wherein the number of the key units is two or more, each of the key units is connected to the first input terminal of the power supply unit, and each of the key units is connected to the corresponding input terminal of the control unit.
10. A remote controller characterized by comprising the key control circuit according to any one of claims 1 to 9.
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| CN202122454416.9U CN216435165U (en) | 2021-10-12 | 2021-10-12 | Key control circuit and remote controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793491A (en) * | 2021-10-12 | 2021-12-14 | 惠州市博实结科技有限公司 | Key control circuit and remote controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113793491A (en) * | 2021-10-12 | 2021-12-14 | 惠州市博实结科技有限公司 | Key control circuit and remote controller |
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