CN220064802U - Watchdog circuit and electronic device - Google Patents
Watchdog circuit and electronic device Download PDFInfo
- Publication number
- CN220064802U CN220064802U CN202321610977.6U CN202321610977U CN220064802U CN 220064802 U CN220064802 U CN 220064802U CN 202321610977 U CN202321610977 U CN 202321610977U CN 220064802 U CN220064802 U CN 220064802U
- Authority
- CN
- China
- Prior art keywords
- circuit
- chip
- capacitor
- switching tube
- watchdog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004146 energy storage Methods 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 58
- 230000005669 field effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Electronic Switches (AREA)
Abstract
The embodiment of the utility model provides a watchdog circuit and electronic equipment, the watchdog circuit comprises: the signal input end is used for receiving pulse signals sent by the chip; a filter circuit for switching on or off according to the frequency of the pulse signal; the switching circuit is connected with the filter circuit and used for controlling the on-off between the chip and the power input end according to the on or off of the filter circuit; the energy storage circuit is connected between the filter circuit and the switch circuit and used for storing electric energy when the filter circuit is conducted, and when the filter circuit is cut off, the energy storage circuit can discharge to the switch circuit so that the switch circuit control chip is conducted with the power input end. The watchdog circuit provided by the utility model can effectively monitor the running condition of the chip, does not need to be provided with a special chip for the watchdog circuit, does not need to additionally increase devices, can effectively simplify the circuit structure and reduces the cost.
Description
Technical Field
The utility model belongs to the technical field of electronic equipment, and particularly relates to a watchdog circuit and electronic equipment.
Background
The watchdog circuit is used for monitoring the running condition of the system in a certain period in a software or hardware mode in the system design, and if the trigger signal from the system is not received in a specified time, the watchdog circuit can forcedly reset the system so as to ensure that the program can be recovered under the abnormal running condition.
In the related art, a special chip is generally adopted in the watchdog circuit, the watchdog chip is connected to an I/O pin and a reset pin of the MCU, if the MCU does not output a clear signal to the watchdog chip for more than a specified time, the watchdog chip can send out a reset signal to reset the MCU, so that the MCU is prevented from being halted. Because the watchdog circuit adopts a special chip, devices are required to be added, the use cost is high, and when the chip fails, the watchdog function is invalid, thereby influencing the use.
Disclosure of Invention
The embodiment of the utility model provides a watchdog circuit and a chip, which are used for solving the problem that the watchdog circuit in the prior art adopts a special chip and has higher use cost.
To solve the above technical problems, an embodiment of the present utility model provides a watchdog circuit, including:
the signal input end is used for receiving pulse signals sent by the chip;
a filter circuit for switching on or off according to the frequency of the pulse signal;
the switching circuit is connected with the filter circuit and is used for controlling the on-off between the chip and the power input end according to the on-off of the filter circuit;
the energy storage circuit is connected between the filter circuit and the switch circuit and is used for storing electric energy when the filter circuit is conducted, and when the filter circuit is cut off, the energy storage circuit can discharge to the switch circuit so that the switch circuit controls the chip to be conducted with the power input end.
In some embodiments, the filter circuit includes a first capacitor and a first resistor, one end of the first capacitor is connected to the signal input end, the other end of the first capacitor is connected to the first resistor, the switch circuit and the tank circuit, and the other end of the first resistor is grounded.
In some embodiments, the switching circuit includes a first switching tube and a second switching tube, a control end of the first switching tube is connected with the first capacitor and the energy storage circuit, an input end of the first switching tube is connected with a control end of the second switching tube, an output end of the first switching tube is grounded, an input end of the second switching tube is connected with a power input end, a control end of the second switching tube is connected with the power input end through a second resistor, and an output end of the second switching tube is connected with the chip.
In some embodiments, the first switching transistor is a first triode and the second switching transistor is a second triode or a field effect transistor.
In some embodiments, the tank circuit includes a second capacitor and a third resistor that are arranged in parallel, one ends of the second capacitor and the third resistor are connected between the first capacitor and the control end of the first switch tube, and the other ends of the second capacitor and the third resistor are respectively grounded.
In some embodiments, the watchdog circuit further comprises a first diode, an anode of the first diode is connected with the first capacitor and the first resistor, and a cathode of the first diode is connected with the second capacitor and a control end of the first switch tube.
In some embodiments, the watchdog circuit further includes a third capacitor and a fourth resistor that are arranged in parallel, one ends of the third capacitor and the fourth resistor are connected between the output end of the second switch tube and the chip, and the other ends of the third capacitor and the fourth resistor are respectively grounded.
In some embodiments, the watchdog circuit further comprises a start-up circuit, wherein the start-up circuit is connected between the input end of the first switching tube and the control end of the second switching tube, and the start-up circuit is used for controlling conduction between the chip and the power supply input end so that the chip starts and emits a pulse signal.
In some embodiments, the starting circuit includes a second diode and a key switch, an anode of the second diode is connected between an input end of the first switch tube and a control end of the second switch tube, a cathode of the second diode is connected with the key switch, and the other end of the key switch is grounded.
The embodiment of the utility model also provides electronic equipment, which comprises:
a chip;
and the watchdog circuit is connected with the chip and used for controlling the connection or disconnection of the chip and the power input end so as to reset the chip, and the watchdog circuit is the watchdog circuit in any embodiment.
According to the watchdog circuit and the electronic equipment provided by the embodiment of the utility model, when the chip works normally, the frequency of the pulse signal sent by the chip is higher than the cutoff frequency of the filter circuit, the filter circuit is conducted, the switch circuit can control the power input end to supply power to the chip normally, the energy storage circuit can store electric energy when the filter circuit is conducted, once the chip is halted or the program operation is abnormal, the pulse signal disappears or the frequency of the pulse signal is lower than the conduction frequency of the filter circuit, at the moment, the filter circuit is cut off, the switch circuit controls the chip to be disconnected from the power input end so as to reset the chip, and then the energy storage circuit discharges to the switch circuit so as to control the power input end to be conducted with the chip again so as to ensure that the chip is reset and restarted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the utility model and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
For a more complete understanding of the present utility model and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts throughout the following description.
Fig. 1 is a first block diagram of a watchdog circuit according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram of a first circuit of a watchdog circuit according to an embodiment of the present utility model.
Fig. 3 is a second block diagram of a watchdog circuit according to an embodiment of the present utility model.
Fig. 4 is a schematic diagram of a second circuit of the watchdog circuit according to an embodiment of the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model based on the embodiments of the present utility model.
In the related art, a special chip is generally adopted in the watchdog circuit, the watchdog chip is connected to an I/O pin and a reset pin of the MCU, if the MCU does not output a clear signal to the watchdog chip for more than a specified time, the watchdog chip can send out a reset signal to reset the MCU, so that the MCU is prevented from being halted. Because the watchdog circuit adopts a special chip, devices are required to be added, the use cost is high, and when the chip fails, the watchdog function is invalid, thereby influencing the use.
The embodiment of the utility model provides a watchdog circuit and a chip, which are used for solving the problem that the watchdog circuit in the prior art adopts a special chip and has higher use cost. The following description will be made with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, fig. 1 is a first block diagram of a watchdog circuit according to an embodiment of the present utility model, and fig. 2 is a first schematic circuit diagram of the watchdog circuit according to the embodiment of the present utility model. The watchdog circuit 100 according to the embodiment of the present utility model includes a signal input terminal IN, a filter circuit 10, a switch circuit 20, and a tank circuit 30. The watchdog circuit 100 can monitor the operation condition of the chip 200, and when the system crashes or operates abnormally, the watchdog circuit 100 can control the chip 200 to reset and restart, and the watchdog command has the highest priority in the interruption of the program.
The signal input terminal IN is connected to the chip 200, for example, the signal input terminal IN is connected to an I/O interface of the chip 200, and is used for receiving a pulse signal sent by the chip 200 and sending the pulse signal to the filter circuit 10, the filter circuit 10 is used for switching on or off according to a frequency of the pulse chip 200, the switch circuit 20 is connected to the filter circuit 10, the switch circuit 20 is used for controlling on/off between the chip 200 and the power input terminal VCC according to the switching on or off of the filter circuit 10, the energy storage circuit 30 is connected between the filter circuit 10 and the switch circuit 20, the energy storage circuit 30 is used for storing electric energy when the filter circuit 10 is switched on, and when the filter circuit 10 is switched off, the energy storage circuit 30 can discharge to the switch circuit 20 so that the switch circuit 20 controls the chip 200 to be switched on with the power input terminal VCC.
It should be noted that, when the chip 200 is in normal operation, the frequency of the pulse signal sent by the chip 200 is higher than the cut-off frequency of the filter circuit 10, the filter circuit 10 is turned on, the switch circuit 20 can control the power input end VCC to supply power to the chip 200 normally, and the energy storage circuit 30 can store electric energy when the filter circuit 10 is turned on, once the chip 200 is dead or the program operation is abnormal, the pulse signal disappears or the frequency of the pulse signal is lower than the turn-on frequency of the filter circuit 10, at this time, the filter circuit 10 is turned off, the switch circuit 20 controls the chip 200 to be disconnected from the power input end VCC to reset the chip 200, and then the energy storage circuit 30 discharges to the switch circuit 20 to control the power input end VCC to be turned on again with the chip 200 to ensure that the chip 200 is reset and restarted.
As shown IN fig. 2, the filter circuit 10 is a high-pass filter circuit composed of a first capacitor C1 and a first resistor R1, one end of the first capacitor C1 is connected to the signal input terminal IN, the other end of the first capacitor C1 is connected to the first resistor R1, the switch circuit 20 and the energy storage circuit 30, and the other end of the first resistor R1 is grounded. According to the characteristic of the first capacitor C1 that the dc-ac is blocked, the first capacitor C1 is turned on when the frequency of the pulse signal outputted from the signal input terminal IN is higher than the cut-off frequency thereof, the filter circuit 10 outputs a high level to the switch circuit 20 and the tank circuit 30, and the first capacitor C1 is turned off when the pulse signal disappears or the frequency of the pulse signal is lower than the cut-off frequency of the filter circuit 10, and the filter circuit 10 outputs a low level. The cut-off frequency of the filter circuit 10 is determined by the resistance-capacitance parameters of the first capacitor C1 and the first resistor R1, and a suitable capacitor-resistor element may be specifically selected according to practical situations.
The switching circuit 20 includes a first switching tube Q1 and a second switching tube Q2, where a control end of the first switching tube Q1 is connected with the first capacitor C1 and the tank circuit 30 through a fifth resistor R5, an input end of the first switching tube Q1 is connected with a control end of the second switching tube Q2 through a sixth resistor R6, an output end of the first switching tube Q1 is grounded, an input end of the second switching tube Q2 is connected to the power input end VCC, a control end of the second switching tube Q2 is connected to the power input end VCC through a second resistor R2, and an output end of the second switching tube Q2 is connected with the chip 200.
The second resistor R2 is a bias resistor of the second switching tube Q2, and the fifth resistor R5 and the sixth resistor R6 are current limiting resistors. The first and second switching transistors Q1 and Q2 may be transistors or field effect transistors. In some embodiments, the first switching transistor Q1 is a first triode and the second switching transistor Q2 is a field effect transistor. In other embodiments, the first switch Q1 is a first transistor, and the second switch Q2 is a second transistor.
As shown in fig. 2, for easy understanding, the embodiment of the utility model is illustrated with the first switch Q1 as an NPN triode and the second switch Q2 as a PMOS field effect transistor, when the chip 200 is in normal operation, the frequency of the pulse signal sent by the chip 200 is higher than the cut-off frequency of the filter circuit 10, the first capacitor C1 is turned on and outputs a high level to the base of the NPN triode, and reaches the turn-on threshold voltage of the NPN triode, the NPN triode is turned on, and the gate of the PMOS field effect transistor is pulled down to a low level while the NPN triode is turned on, so that the PMOS field effect transistor is turned on, and the power input terminal VCC can normally supply power to the chip 200. Once the chip 200 is halted or the program is abnormally operated, the pulse signal disappears or the frequency of the pulse signal is lower than the conduction frequency of the filter circuit 10, the first capacitor C1 is turned off and outputs a low-level signal to the base electrode of the NPN triode, the NPN triode is turned off, the power output end maintains the high level of the grid electrode of the PMOS field effect transistor through the second resistor R2, the PMOS field effect transistor is turned off, and the power input end VCC cannot provide power for the chip 200, thereby causing the chip 200 to be powered off and reset.
With continued reference to fig. 2, the tank circuit 30 includes a second capacitor C2 and a third resistor R3 connected in parallel, one end of the second capacitor C2 and one end of the third resistor R3 are connected between the first capacitor C1 and the control end of the first switch tube Q1, and the other end of the second capacitor C2 and the other end of the third resistor R3 are grounded respectively. When the chip 200 is operating normally, the frequency of the pulse signal sent by the chip 200 is higher than the cut-off frequency of the filter circuit 10, and the first capacitor C1 is turned on to charge the second capacitor C2. Once the chip 200 is halted or the program is abnormally operated, after the chip 200 is powered off and reset, the second capacitor C2 can discharge to the control end of the first switching tube Q1 to conduct the first switching tube Q1, the control end of the second switching tube Q2 is pulled down to be at a low level while the first switching tube Q1 is conducted, the second switching tube Q2 is conducted, and at the moment, the power input end VCC can supply power to the chip 200 again to reset and restart the chip 200.
In some embodiments, the watchdog circuit 100 further includes a first diode D1, an anode of the first diode D1 is connected to the first capacitor C1 and the first resistor R1, and a cathode of the first diode D1 is connected to the second capacitor C2 and a control terminal of the first switch tube Q1. By utilizing the unidirectional conduction characteristic of the first diode D1, the high level output by the first capacitor C1 is transmitted to the second capacitor C2 and the control end of the first switch tube Q1 through the first diode D1, and the electric energy of the second capacitor C2 can be prevented from being discharged to the first capacitor C1, so that the current stabilizing and protecting effects are achieved on the circuit.
In some embodiments, the watchdog circuit 100 further includes a third capacitor C3 and a fourth resistor R4 disposed in parallel, one end of the third capacitor C3 and one end of the fourth resistor R4 are connected between the output end of the second switching tube Q2 and the chip 200, and the other end of the third capacitor C3 and the other end of the fourth resistor R4 are grounded respectively. It should be noted that the third capacitor C3 and the fourth resistor R4 may form the low-pass filter circuit 10 to filter the high-frequency interference signal of the power input VCC, so as to avoid interference to the chip 200.
Referring to fig. 3 and fig. 4, fig. 3 is a second block diagram of a watchdog circuit according to an embodiment of the present utility model, and fig. 4 is a second schematic circuit diagram of the watchdog circuit according to an embodiment of the present utility model. In some embodiments, the watchdog circuit 100 further includes a start-up circuit 40, the start-up circuit 40 is connected between the input terminal of the first switching tube Q1 and the control terminal of the second switching tube Q2, the start-up circuit 40 is configured to control the conduction between the chip 200 and the power input terminal VCC, so that the chip 200 starts up and sends out a pulse signal, and then the watchdog circuit 100 can monitor the operation condition of the chip 200 according to the frequency of the pulse signal.
The starting circuit 40 includes a second diode D2 and a key switch S1, wherein an anode of the second diode D2 is connected between an input end of the first switching tube Q1 and a control end of the second switching tube Q2, a cathode of the second diode D2 is connected with the key switch S1 through a seventh resistor R7, and the other end of the key switch S1 is grounded.
In the actual use process, the chip 200 needs to be started first, so that the chip 200 sends out a pulse signal, and then the watchdog circuit 100 can monitor the operation condition of the chip 200 according to the frequency of the pulse signal. The start-up procedure for chip 200 is: when the key switch S1 is pressed, the control end of the second switching tube Q2 is grounded through the key switch S1, so that the control end of the second switching tube Q2 is pulled down to be at a low level, the second switching tube Q2 is turned on, and at this time, the power input end VCC can supply power to the chip 200 through the second switching tube Q2, so that the chip 200 is started and emits a pulse signal.
For a better understanding of the present utility model, the following describes the operation of the watchdog circuit 100 according to an embodiment of the present utility model in detail with reference to fig. 1 to 4.
When the chip 200 is in normal operation, the frequency of the pulse signal sent by the chip 200 is higher than the cut-off frequency of the filter circuit 10, the first capacitor C1 is turned on and outputs a high level to the control end of the first switch tube Q1, and reaches the on threshold voltage of the first switch tube Q1, the first switch tube Q1 is turned on, and the control end of the second switch tube Q2 is pulled down to a low level while the first switch tube Q1 is turned on, so that the second switch tube Q2 is turned on, the power supply input end VCC can normally supply power to the chip 200, and meanwhile, the first capacitor C1 is turned on and can also charge the second capacitor C2. Once the chip 200 is halted or the program is abnormally operated, the pulse signal disappears or the frequency of the pulse signal is lower than the conduction frequency of the filter circuit 10, the first capacitor C1 is turned off and outputs a low-level signal to the control end of the first switching tube Q1, the first switching tube Q1 is turned off, the control end of the second switching tube Q2 is maintained at a high level by the power output end through the second resistor R2, the second switching tube Q2 is turned off, the power input end VCC cannot provide power for the chip 200, so that the chip 200 is powered off and reset, then the second capacitor C2 can discharge to the control end of the first switching tube Q1 to conduct the first switching tube Q1, the control end of the second switching tube Q2 is pulled down to a low level while the first switching tube Q1 is conducted, and the power input end VCC can supply power to the chip 200 again at this time, so that the chip 200 is reset and restarted. Therefore, the watchdog circuit 100 provided by the utility model can effectively monitor the running condition of the chip 200, does not need to be provided with a special chip for the watchdog circuit, does not need to additionally increase devices, can effectively simplify the circuit structure, and reduces the cost.
The embodiment of the utility model further provides an electronic device, which includes a chip 200 and a watchdog circuit 100, wherein the watchdog circuit 100 is connected to the chip 200, and the watchdog circuit 100 is used for controlling the on/off of the chip 200 and a power input terminal VCC so as to reset the chip 200, and the watchdog circuit 100 is the watchdog circuit 100 described in any of the above embodiments. Compared with the related art, the electronic equipment provided by the embodiment of the utility model does not need to be provided with a special chip for the watchdog circuit, so that the circuit structure can be effectively simplified, and the cost is reduced.
In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features.
The watchdog circuit and the electronic device provided by the embodiments of the present utility model are described in detail, and specific examples are applied to illustrate the principles and the implementation of the present utility model, and the description of the above embodiments is only used to help understand the method and the core idea of the present utility model; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present utility model, the present description should not be construed as limiting the present utility model in summary.
Claims (10)
1. A watchdog circuit, comprising:
the signal input end is used for receiving pulse signals sent by the chip;
a filter circuit for switching on or off according to the frequency of the pulse signal;
the switching circuit is connected with the filter circuit and is used for controlling the on-off between the chip and the power input end according to the on-off of the filter circuit;
the energy storage circuit is connected between the filter circuit and the switch circuit and is used for storing electric energy when the filter circuit is conducted, and when the filter circuit is cut off, the energy storage circuit can discharge to the switch circuit so that the switch circuit controls the chip to be conducted with the power input end.
2. The watchdog circuit of claim 1, wherein the filter circuit comprises a first capacitor and a first resistor, one end of the first capacitor is connected to the signal input terminal, the other end of the first capacitor is connected to the first resistor, the switch circuit and the tank circuit, and the other end of the first resistor is grounded.
3. The watchdog circuit of claim 2, wherein the switching circuit comprises a first switching tube and a second switching tube, a control end of the first switching tube is connected with the first capacitor and the energy storage circuit, an input end of the first switching tube is connected with a control end of the second switching tube, an output end of the first switching tube is grounded, an input end of the second switching tube is connected with a power input end, a control end of the second switching tube is connected with the power input end through a second resistor, and an output end of the second switching tube is connected with the chip.
4. A watchdog circuit according to claim 3, wherein the first switching transistor is a first transistor and the second switching transistor is a second transistor or a field effect transistor.
5. A watchdog circuit according to claim 3, wherein the tank circuit comprises a second capacitor and a third resistor arranged in parallel, one end of the second capacitor and one end of the third resistor being connected between the first capacitor and the control end of the first switching tube, and the other end of the second capacitor and the other end of the third resistor being respectively grounded.
6. The watchdog circuit of claim 5, further comprising a first diode, an anode of the first diode being connected to the first capacitor and the first resistor, a cathode of the first diode being connected to the second capacitor and a control terminal of the first switch tube.
7. A watchdog circuit according to claim 3, further comprising a third capacitor and a fourth resistor arranged in parallel, one end of the third capacitor and one end of the fourth resistor being connected between the output end of the second switching tube and the chip, and the other end of the third capacitor and the other end of the fourth resistor being grounded respectively.
8. A watchdog circuit according to claim 3, further comprising a start-up circuit connected between the input of the first switching tube and the control of the second switching tube, the start-up circuit being adapted to control conduction between the chip and the power supply input to enable the chip to start up and emit a pulse signal.
9. The watchdog circuit of claim 8, wherein the start-up circuit comprises a second diode and a key switch, an anode of the second diode is connected between an input terminal of the first switch tube and a control terminal of the second switch tube, a cathode of the second diode is connected with the key switch, and the other end of the key switch is grounded.
10. An electronic device, comprising:
a chip;
and the watchdog circuit is connected with the chip and used for controlling the connection or disconnection of the chip and the power input end so as to reset the chip, and the watchdog circuit is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321610977.6U CN220064802U (en) | 2023-06-21 | 2023-06-21 | Watchdog circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321610977.6U CN220064802U (en) | 2023-06-21 | 2023-06-21 | Watchdog circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220064802U true CN220064802U (en) | 2023-11-21 |
Family
ID=88765449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321610977.6U Active CN220064802U (en) | 2023-06-21 | 2023-06-21 | Watchdog circuit and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220064802U (en) |
-
2023
- 2023-06-21 CN CN202321610977.6U patent/CN220064802U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020062817A1 (en) | Control circuit for suppressing surge voltage and current of power supply, and power supply | |
| CN109032318B (en) | Power supply monitoring system and storage server system | |
| CN220064802U (en) | Watchdog circuit and electronic device | |
| CN213601084U (en) | Switch control circuit and endoscope system | |
| CN110350902B (en) | Anti-misoperation circuit and anti-misoperation device | |
| CN209784946U (en) | controllable reset circuit based on single chip microcomputer | |
| CN114389590A (en) | Single-key startup and shutdown device, startup and shutdown method and remote restart method | |
| CN112165246B (en) | Power supply chip self-restarting device, method and system | |
| CN216450086U (en) | Digital display electronic counter capable of being restarted at any time | |
| CN113031739B (en) | Computer and power-on starting circuit thereof | |
| CN210518245U (en) | Startup and shutdown circuit and startup and shutdown system | |
| CN113765356A (en) | Power supply restarting circuit | |
| CN110795277A (en) | Power failure self-restarting device, method and system and computer readable storage medium | |
| CN113098097A (en) | Electrical equipment, power supply system and control method thereof | |
| CN207851757U (en) | Local fault recovery device and embedded device | |
| CN109742938B (en) | Anti-interference delay start control circuit and system | |
| CN220553846U (en) | Battery control device for switching device and switching device | |
| CN215871174U (en) | Circuit with discharge load switch | |
| CN218449453U (en) | Relay switching-off circuit | |
| CN218124385U (en) | Driving circuit for dual-power system | |
| CN220122612U (en) | Voltage limiting protection circuit | |
| CN220173096U (en) | Electronic equipment and power supply enabling loop | |
| CN220627110U (en) | Electronic equipment and restarting device | |
| CN220271942U (en) | Electronic equipment and restarting device thereof | |
| CN109981090B (en) | Soft on-off circuit capable of automatically recovering on-off state |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |