CN213585734U - Circuit for realizing synchronous switch of equipment following host - Google Patents
Circuit for realizing synchronous switch of equipment following host Download PDFInfo
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- CN213585734U CN213585734U CN202022064337.2U CN202022064337U CN213585734U CN 213585734 U CN213585734 U CN 213585734U CN 202022064337 U CN202022064337 U CN 202022064337U CN 213585734 U CN213585734 U CN 213585734U
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Abstract
The utility model discloses a circuit of host computer synchro switch is followed to realization equipment, including equipment power input module, host computer switch detection circuitry and equipment power switch circuit, equipment power switch circuit and equipment power input module electricity are connected, host computer switch detection circuitry is connected with host computer switching signal end and equipment power switch circuit electricity simultaneously, equipment power switch circuit is connected with a plurality of external device one-to-one electricity through a plurality of output control ends, and the output signal of equipment power switch circuit's output control end is the same start signal or the same shutdown signal with the host computer switching signal of host computer switching signal end. When the host computer is started, the external devices are also started, and when the host computer is shut down, the corresponding external devices are also shut down, namely, the external devices follow the host computer to be synchronously switched instead of independently starting or shutting down each external device, so that the operation process is simplified, and the use convenience of a hardware system is improved.
Description
Technical Field
The utility model relates to the field of electronic technology, in particular to circuit that host computer synchronous switch was followed to realization equipment.
Background
Many hardware systems today include a host and a number of peripheral devices. When the system is running, the operator needs to turn on the host and all the external devices, and in the prior art, the external devices are generally independently turned on and off. Thus, the prior art has two disadvantages:
1. when the device needs to be started, under normal conditions, each external device needs to be powered on or a start key needs to be pressed, and the operation is complex.
2. According to the scheme, when the equipment needs to be shut down, under a normal condition, the power supply of each external equipment needs to be disconnected or the shutdown key needs to be pressed, and the operation is complex.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the circuit for realizing synchronous startup and shutdown of the external equipment along with the host is provided, startup and shutdown of a plurality of external equipment are uniformly controlled, and convenience in use of a hardware system is improved.
In order to solve the technical problem, the utility model discloses a technical scheme be:
a circuit for realizing synchronous on-off of an external device along with a host comprises a device power supply input module, a host switch detection circuit for detecting a host switch signal and a device power supply switch circuit for controlling the on-off state of the external device, wherein the device power supply switch circuit is electrically connected with the device power supply input module;
the host switch detection circuit is simultaneously electrically connected with a host switch signal end for generating a host switch signal and the equipment power switch circuit;
the equipment power supply switch circuit is electrically connected with the plurality of external equipment in a one-to-one correspondence manner through a plurality of output control ends;
the output signal of the output control end of the equipment power supply switch circuit and the host switch signal of the host switch signal end are the same starting signal or the same shutdown signal.
Furthermore, the host switch signal detection circuit comprises a first MOS transistor, a first resistor and a second resistor, and the equipment power switch circuit comprises a second MOS transistor, a third resistor and a first capacitor;
one end of the first resistor is electrically connected with the host switch signal end, the other end of the first resistor is connected with the grid electrode of the first MOS tube, one end of the second resistor is connected with the drain electrode of the first MOS tube, the other end of the second resistor is simultaneously connected with the grid electrode of the second MOS tube and one end of the third resistor, the source electrode of the second MOS tube is simultaneously connected with the other end of the third resistor and the equipment power input module, and a plurality of drain electrodes of the second MOS tube are respectively connected with the power input ends of a plurality of external equipment in a one-to-one correspondence manner and are simultaneously connected with one end of the first capacitor;
the source electrode of the first MOS tube and the other end of the first capacitor are both grounded;
the first MOS tube is an N-channel MOS tube, and the second MOS tube is a P-channel MOS tube which contains a plurality of drain electrodes as output control ends.
Further, the device power switch circuit further comprises a second capacitor;
one end of the second capacitor is connected with the equipment power supply input module, and the other end of the second capacitor is connected with the grid electrode of the second MOS tube.
Further, the host switch signal detection circuit further comprises a fourth resistor;
one end of the fourth resistor is connected with the grid electrode of the first MOS tube, and the other end of the fourth resistor is grounded.
Further, the model of the first MOS transistor is BSS 138.
Further, the second MOS transistor is of a model AO4437 with a plurality of drain outputs.
The beneficial effects of the utility model reside in that: the circuit for realizing the synchronous switching of the equipment following the host receives a host switching signal of a host switching signal end, and accordingly the output control end of the power supply switching circuit of the control equipment outputs a corresponding switching signal to the external equipment, and the on-off state of the external equipment is controlled. When the host computer is started, the host computer switch detection circuit receives the host computer switch signal and controls the output control end of the device power switch circuit to output the starting signal to the external device, the external device is started, and when the host computer is shut down, the corresponding external device is also shut down, namely, the external device follows the host computer to be synchronously switched instead of independently starting or shutting down each external device, so that the operation process is simplified, and the use convenience of a hardware system is improved.
Drawings
Fig. 1 is a schematic structural diagram of a synchronous switch for realizing device following of a host according to a first embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a specific circuit for implementing the device following host synchronous switch according to the second embodiment of the present invention;
description of reference numerals:
1. a device power input module; 2. a host switch detection circuit; 3. a device power switching circuit; 4. externally connecting equipment; 5. a host switch signal terminal;
c1, a first capacitance; c2, a second capacitor;
q1, a first MOS tube; q2 and a second MOS tube;
r1, a first resistor; r2, a second resistor; r3, third resistor; r4 and a fourth resistor.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 and fig. 2, a circuit for realizing synchronous switching of a device following a host includes a device power input module 1, a host switch detection circuit 2 for detecting a host switch signal, and a device power switch circuit 3 for controlling a switch state of an external device 4, where the device power switch circuit 3 is electrically connected to the device power input module 1;
the host switch detection circuit is simultaneously electrically connected with a host switch signal end for generating a host switch signal and the equipment power switch circuit;
the equipment power switch circuit 3 is electrically connected with the plurality of external equipment 4 in a one-to-one correspondence manner through a plurality of output control ends;
the output signal of the output control end of the device power switch circuit 3 and the host switch signal of the host switch signal end 5 are the same start-up signal or the same shutdown signal.
The beneficial effects of the utility model reside in that: the circuit for realizing synchronous switching of the equipment following the host receives a host switching signal of a host switching signal terminal 5, and accordingly outputs a corresponding switching signal to the external equipment 4 by controlling an output control terminal of the equipment power switching circuit 3, and accordingly controls the on-off state of the external equipment 4. When the host computer is started, the host computer switch detection circuit 2 receives the host computer switch signal and controls the output control end of the device power switch circuit 3 to output the starting signal to the external device 4, the external device 4 is started, and when the host computer is shut down, the corresponding external device is also shut down, namely, each external device 4 does not need to be independently started or shut down, but the external device 4 follows the host computer synchronous switch, so that the operation process is simplified, and the use convenience of a hardware system is improved.
Further, the host switch signal detection circuit 2 includes a first MOS transistor Q1, a first resistor R1 and a second resistor R2, and the device power switch circuit 3 includes a second MOS transistor Q2, a third resistor R3 and a first capacitor C1;
one end of the first resistor R1 is electrically connected to the host switch signal terminal 5, and the other end of the first resistor R1 is connected to the gate of the first MOS transistor Q1, one end of the second resistor R2 is connected to the drain of the first MOS transistor Q1, and the other end of the second resistor R2 is connected to the gate of the second MOS transistor Q2 and one end of the third resistor R3, the source of the second MOS transistor Q2 is connected to the other end of the third resistor R3 and the device power input module 1, and the drains of the second MOS transistor Q2 are connected to the power input terminals of the plurality of external devices 4 in a one-to-one correspondence, and are connected to one end of the first capacitor C1;
the source of the first MOS transistor Q1 and the other end of the first capacitor C1 are both grounded;
the first MOS transistor Q1 is an N-channel MOS transistor, and the second MOS transistor Q2 is a P-channel MOS transistor with a plurality of drains as output control ends.
As can be seen from the above description, when the host is turned on, the host turn-on detection circuit 1 receives the host turn-on signal from the host switch signal terminal 5, the gate of the first MOS transistor Q1 of the host switch detection circuit 2 is at a high level, and the source is at a low level, so that the first MOS transistor Q1 is turned on; further, since the first MOS transistor Q1 is turned on, the second MOS transistor Q2 is grounded via the second resistor R2, and the input voltage thereof is lowered. The voltage difference between the gate and the source of the second MOS transistor Q2 is greater than the threshold, the second MOS transistor Q2 is turned on, the output power of the device power input module 1 flows into the power input end of each corresponding external device 4 through the output of the plurality of drains of the second MOS transistor Q2, the external device 4 is turned on, and after the host is turned off, the gate of the first MOS transistor Q1 is at a low level, the first MOS transistor Q1 is turned off, the corresponding second MOS transistor Q2 is also turned off, and the external device 4 is turned off.
Further, the device power switch circuit 3 further includes a second capacitor C2;
one end of the second capacitor C2 is connected to the device power input module 1, and the other end is connected to the gate of the second MOS transistor Q2.
As can be seen from the above description, the second capacitor C2 is a decoupling capacitor for increasing the switching stability of the second MOS transistor Q2.
Further, the host switch signal detection circuit 2 further includes a fourth resistor R4;
one end of the fourth resistor R4 is connected to the gate of the first MOS transistor Q1, and the other end is grounded.
As can be seen from the above description, a fourth resistor R4 (pull-down resistor) with one end grounded is added to the gate of the first MOS transistor Q1 to ensure that the gate of the first MOS transistor Q1 is at a low level and the first MOS transistor Q1 stably maintains an off state when the host is turned off.
Further, the model of the first MOS transistor Q1 is BSS 138.
From the above description, the first MOS transistor Q1 of the host switching signal detection circuit 2 is an N-channel MOS transistor BSS138 with maximum voltage up to 50V and low power consumption, and its performance is excellent, and it is suitable for the circuit design.
Further, the second MOS transistor Q2 is of type AO4437 with multiple drain outputs.
As can be seen from the above description, the second MOS transistor Q2 adopts the AO4437 with multiple drain outputs, which is convenient for connecting multiple external devices 4 externally, so that the host can control the on/off states of multiple external devices 4 simultaneously, thereby greatly improving the convenience of the present invention.
Referring to fig. 1, a first embodiment of the present invention is:
the utility model relates to a realize that equipment follows host computer synchro switch's circuit, this circuit are applicable to many and contain the supporting system that uses of principal and subordinate equipment, realize when the system function, and the operation of principal and subordinate equipment switching on and shutting down is simplified, promote the convenience that the system used.
A circuit for realizing synchronous switching of equipment following a host computer is shown in figure 1 and comprises an equipment power supply input module 1, a host computer switch detection circuit 2 for detecting a host computer switch signal and an equipment power supply switch circuit 3 for controlling the switch state of an external equipment 4. The device power supply switch circuit 3 is electrically connected with the device power supply input module 1, the host switch detection circuit 2 is electrically connected with the host switch signal terminal 5 and the device power supply switch circuit 3, and the device power supply switch circuit 3 is electrically connected with the external devices 4 in a one-to-one correspondence manner through a plurality of output control terminals. In this embodiment, the device power switch circuit 3 is equivalent to adding a switch device between the external devices 4 and the corresponding power supply, i.e. the connection wires of the device power input module 1, and the host switch signal detection circuit 2 is used for controlling the on-off state of the switch device according to the host switch signal sent by the host switch signal terminal 5, specifically, the output signal of the output control terminal of the device power switch circuit 3 and the host switch signal of the host switch signal terminal 5 are the same power on signal or the same power off signal. When the host is powered on, the host switch signal detection circuit 2 receives the power-on signal, and then controls the switching device to be turned off, the circuit between the external device 4 and the device power input module 1 is conducted, and the plurality of external devices 4 are also powered on.
Referring to fig. 2, the second embodiment of the present invention is:
the utility model relates to a realize that equipment follows host computer synchro switch's circuit, this circuit are applicable to many and contain the supporting system that uses of principal and subordinate equipment, realize when the system function, and the operation of principal and subordinate equipment switching on and shutting down is simplified, promote the convenience that the system used.
A circuit for realizing device follow-up host synchronous switch is disclosed, as shown in FIG. 2, a host switch signal detection circuit 2 comprises a first MOS transistor Q1, a first resistor R1 and a second resistor R2, and a device power switch circuit 3 comprises a second MOS transistor Q2, a third resistor R3 and a first capacitor C1.
One end of the first resistor R1 is electrically connected to the host switch signal terminal 5, and the other end is connected to the gate of the first MOS transistor Q1, one end of the second resistor R2 is connected to the drain of the first MOS transistor Q1, and the other end is connected to the gate of the second MOS transistor Q2 and one end of the third resistor R3, the source of the second MOS transistor Q2 is connected to the other end of the third resistor R3 and the device power input module 1, the drains of the second MOS transistor Q2 are connected to the power input terminals of the external devices 4 in a one-to-one correspondence manner and are connected to one end of the first capacitor C1, the source of the first MOS transistor Q1 and the other end of the first capacitor C1 are both grounded, the first MOS transistor Q1 is an N-channel MOS transistor, and the second MOS transistor Q2 is a P-channel transistor having a plurality of drains as an output control terminal. In the present embodiment, the switching characteristic of the MOS is mainly used to realize that the external device 4 follows the host synchronous switching.
In this embodiment, as shown in fig. 2, the device power switch circuit 3 further includes a second capacitor C2, one end of the second capacitor C2 is connected to the device power input module 1, and the other end is connected to the gate of the second MOS transistor Q2, that is, a decoupling capacitor is connected in parallel to two ends of the third resistor R3, so as to improve the stability of the power input and ensure the stable operation of the second MOS transistor Q2. Furthermore, the host switch signal detection circuit 2 further includes a fourth resistor R4, one end of the fourth resistor R4 is connected to the gate of the first MOS transistor Q1, and the other end is grounded. The fourth resistor R4 is a pull-down resistor, which ensures that the first MOS transistor Q1 is in an off state when the host is in an off state. The second capacitor C2 and the fourth resistor R4 are added to improve the stability of the circuit operation of the device following the host synchronous switch.
Also, in this embodiment, the second MOS transistor Q2 is model AO4437 with multiple drain outputs. P channel MOS pipe AO4437 has four drain electrode outputs, satisfies the utility model discloses in can external a plurality of equipment external device switch circuit 3's design demand, help promoting the utility model discloses the convenience that whole circuit used.
To sum up, the beneficial effects of the utility model reside in that: the circuit for realizing the synchronous switching of the equipment following the host receives a host switching signal of a host switching signal end, and accordingly the output control end of the power supply switching circuit of the control equipment outputs a corresponding switching signal to the external equipment, and the on-off state of the external equipment is controlled. When the host computer is started, the host computer switch detection circuit receives the host computer switch signal and controls the output control end of the device power switch circuit to output the starting signal to the external device, the external device is started, and when the host computer is shut down, the corresponding external device is also shut down, namely, the external device follows the host computer to be synchronously switched instead of independently starting or shutting down each external device, so that the operation process is simplified, and the use convenience of a hardware system is improved. The application utilizes the switching characteristic of the MOS to realize that the external equipment follows the synchronous switch of the host, and is connected with the decoupling capacitor and the pull-down resistor to improve the working stability of the circuit. When in use, the output control of the equipment power switch circuit adopts a P-channel MOS tube with a plurality of drain outputs, so that more external equipment can be connected and controlled, and the use convenience of the circuit is improved.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (6)
1. A circuit for realizing synchronous switching of equipment following a host is characterized by comprising an equipment power supply input module, a host switch detection circuit for detecting a host switch signal and an equipment power supply switch circuit for controlling the switch state of external equipment, wherein the equipment power supply switch circuit is electrically connected with the equipment power supply input module;
the host switch detection circuit is simultaneously electrically connected with a host switch signal end for generating a host switch signal and the equipment power switch circuit;
the equipment power supply switch circuit is electrically connected with the plurality of external equipment in a one-to-one correspondence manner through a plurality of output control ends;
the output signal of the output control end of the equipment power supply switch circuit and the host switch signal of the host switch signal end are the same starting signal or the same shutdown signal.
2. The circuit for realizing the device follow-up host synchronous switch according to claim 1, wherein the host switch signal detection circuit comprises a first MOS transistor, a first resistor and a second resistor, and the device power switch circuit comprises a second MOS transistor, a third resistor and a first capacitor;
one end of the first resistor is electrically connected with the host switch signal end, the other end of the first resistor is connected with the grid electrode of the first MOS tube, one end of the second resistor is connected with the drain electrode of the first MOS tube, the other end of the second resistor is simultaneously connected with the grid electrode of the second MOS tube and one end of the third resistor, the source electrode of the second MOS tube is simultaneously connected with the other end of the third resistor and the equipment power input module, and a plurality of drain electrodes of the second MOS tube are respectively connected with the power input ends of a plurality of external equipment in a one-to-one correspondence manner and are simultaneously connected with one end of the first capacitor;
the source electrode of the first MOS tube and the other end of the first capacitor are both grounded;
the first MOS tube is an N-channel MOS tube, and the second MOS tube is a P-channel MOS tube which contains a plurality of drain electrodes as output control ends.
3. The circuit of claim 2, wherein the device power switch circuit further comprises a second capacitor;
one end of the second capacitor is connected with the equipment power supply input module, and the other end of the second capacitor is connected with the grid electrode of the second MOS tube.
4. The circuit for realizing device follow-up host synchronous switching according to claim 2, wherein the host switch signal detection circuit further comprises a fourth resistor;
one end of the fourth resistor is connected with the grid electrode of the first MOS tube, and the other end of the fourth resistor is grounded.
5. The circuit for realizing device follower master synchronous switching according to claim 2, wherein the first MOS transistor is of type BSS 138.
6. The circuit for realizing device-follow-up host synchronous switching according to claim 2, wherein the second MOS transistor is of a model AO4437 with a plurality of drain outputs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022064337.2U CN213585734U (en) | 2020-09-18 | 2020-09-18 | Circuit for realizing synchronous switch of equipment following host |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022064337.2U CN213585734U (en) | 2020-09-18 | 2020-09-18 | Circuit for realizing synchronous switch of equipment following host |
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| CN213585734U true CN213585734U (en) | 2021-06-29 |
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| CN202022064337.2U Active CN213585734U (en) | 2020-09-18 | 2020-09-18 | Circuit for realizing synchronous switch of equipment following host |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019875A (en) * | 2021-11-05 | 2022-02-08 | 深圳市精锋医疗科技股份有限公司 | Power supply device, method for controlling equipment to be turned on and turned off, working equipment and working system |
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2020
- 2020-09-18 CN CN202022064337.2U patent/CN213585734U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019875A (en) * | 2021-11-05 | 2022-02-08 | 深圳市精锋医疗科技股份有限公司 | Power supply device, method for controlling equipment to be turned on and turned off, working equipment and working system |
| CN114019875B (en) * | 2021-11-05 | 2023-12-08 | 深圳市精锋医疗科技股份有限公司 | Power supply device, method for controlling equipment to be started and shut down, working equipment and working system |
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