CN103633977A - Double-input switching circuit and power-off protecting method applying same circuit - Google Patents
Double-input switching circuit and power-off protecting method applying same circuit Download PDFInfo
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- CN103633977A CN103633977A CN201310539303.6A CN201310539303A CN103633977A CN 103633977 A CN103633977 A CN 103633977A CN 201310539303 A CN201310539303 A CN 201310539303A CN 103633977 A CN103633977 A CN 103633977A
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Abstract
The invention provides a double-input switching circuit. The double-input switching circuit comprises a master switching circuit of power utilizing equipment, wherein the master switching circuit is controlled by two input circuits, a hardware signal input control circuit is used as one input circuit, a software signal input control circuit is used as the other input circuit, the input end of the hardware signal input control circuit is connected with a hardware switch of the power utilizing equipment, and the input end of the software signal input control circuit is connected with the software output end of the power utilizing equipment; the output end of the hardware signal input control circuit and the output end of the software signal input control circuit are connected and then connected with the control end of the master switching circuit. Input control is carried out respectively through the two circuits of a hardware input signal and a software input signal. When the hardware input signal is closed, the switching circuit can be turned on by the software input signal, the power utilizing equipment continuously works in the maintaining period of the software input signal, related data are saved, the switching circuit is turned off until the software input signal fails, and the power utilizing equipment is powered off.
Description
Technical field
The invention belongs to electronic technology field, be specifically related to a kind of switching circuit, the switching circuit of particularly being controlled by two-way input signal.
Background technology
Switching circuit can be controlled access and the disconnection of power supply, has been widely used in multiple fields, such as communication, computer, automatic control etc.These switching circuits are applied to protecting semiconductor equipment superheat state more, overcurrent or overvoltage etc.The switching circuit of prior art all only has a road input signal to carry out switching on and off of control switch.When switching tube is closed and had no progeny by input control signal, equipment just quits work at once, is easy to like this make some data of device interior not have enough time to preserve, and causes the phenomenon of loss of data.And the switching circuit of prior art is not done relevant protection for switching tube, if the supply voltage of input surpasses the withstand voltage of switching tube, switching tube not only burns, also can cause other devices of circuit to burn because switching circuit loses efficacy.
Summary of the invention
The object of the invention is to propose a kind of switching circuit of dual input, to avoid causing device interior data to fail the situation of preserving in time because switching circuit disconnects suddenly.
According to the switching circuit of dual input provided by the invention, key is to comprise the main switch circuit of power consumption equipment, described main switch circuit is by two-way input control, wherein a road is input as hardware signal input control circuit, another road is input as software signal input control circuit, the input of described hardware signal input control circuit is connected with the hardware switch of power consumption equipment, and the input of described software signal input control circuit is connected with the software output of power consumption equipment; After being connected, the output of the output of described hardware signal input control circuit and described software signal input control circuit is connected with the control end of described main switch circuit again.
The switching circuit of dual input of the present invention, respectively by hardware input signal and software input signal two-way input control, when hardware input signal is closed, can open switching circuit by software input signal, in the time period that power consumption equipment is maintained at software input signal, work on, preserve related data, until after the inefficacy of software input signal, switching circuit just disconnects, power consumption equipment power-off.
Specifically, described main switch circuit is switch mosfet circuit, between the source electrode of the MOSFET pipe of described main switch circuit and gate pole, is parallel with voltage-stabiliser tube, to protect MOSFET pipe.
Specifically, described hardware signal input control circuit and software signal input control circuit are transistor switching circuit.
Further, described hardware signal input control circuit and software signal input control circuit are all provided for the resistance of dividing potential drop, to make the switching tube of hardware signal input control circuit and software signal input control circuit obtain comparatively safe voltage by dividing potential drop mode.
Specifically, the described resistance for dividing potential drop comprise be connected on the resistance of transistor base input and be connected in parallel on transistor base and emitter between resistance.
Another order of the present invention is to provide a kind of power-off protection method of circuit of the switch of applying dual input.
When the key of this power-off protection method is that the hardware switch of power consumption equipment is closed main switch circuit by hardware signal input control circuit, the software signal output of power consumption equipment turn-offs after controlling main switch circuit time delay preset time T by software signal input control circuit again.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Fig. 2 is electrical structure diagram of the present invention.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail as the effect of the mutual alignment between the shape of each related member, structure, each several part and annexation, each several part and operation principle etc.
As Fig. 1, the switching circuit of dual input of the present invention, the main switch circuit that comprises power consumption equipment, main switch circuit is by two-way input control, wherein a road is input as hardware signal input control circuit, another road is input as software signal input control circuit, and the input of hardware signal input control circuit is connected with the hardware switch of power consumption equipment, and the input of software signal input control circuit is connected with the software output of power consumption equipment; After being connected, the output of the output of hardware signal input control circuit and software signal input control circuit is connected with the control end of main switch circuit again.
As shown in Figure 2, specifically, main switch circuit is switch mosfet circuit, is parallel with voltage-stabiliser tube D1, to protect MOSFET pipe between the source electrode of the MOSFET pipe Q3 of main switch circuit and gate pole.The voltage of voltage regulation of D1 is greater than the normal range value of power input voltage, a little less than or approach the limit Vgs(gate pole of Q3 and the voltage between source electrode) voltage, the voltage of voltage regulation value of D1 can not be greater than the limit Vgs value of Q3.When under certain mal-condition, when power input voltage is not normal range value, after D1 voltage of voltage regulation, also after the Vgs voltage higher than Q3, D1 will clamp down on power input voltage in the voltage of voltage regulation value of D1, reaches the object of protection Q3 pipe.Hardware signal input control circuit and software signal input control circuit are transistor switching circuit.Hardware signal input control circuit is provided for resistance R 1 and the R2 of dividing potential drop, and wherein, R1 is connected on the base input end of triode Q1, and R2 is connected in parallel between triode Q1 base stage and emitter, and C1 strobes.Software signal input control circuit is provided for resistance R 3 and the R4 of dividing potential drop, and wherein, R3 is connected on the base input end of triode Q2, and R4 is connected in parallel between triode Q2 base stage and emitter, and C2 strobes.
The switching circuit of dual input of the present invention; be mainly used in the power-off protection of power consumption equipment; power-off protection method is: when the hardware switch of power consumption equipment is closed main switch circuit by hardware signal input control circuit, the software signal output of power consumption equipment turn-offs after controlling main switch circuit time delay preset time T by software signal input control circuit again.
By above-mentioned narration, can see that switching circuit of the present invention is mainly applicable to electric equipment and will turn-offs, pressed after outside stopcock, power consumption equipment inside also needs data to preserve in the example turn-offing completely voluntarily again after finishing, especially be specially adapted on monolithic processor controlled electric equipment, by being very easy to that software input signal circuit is set, controlled the time that power switching module is connected like this.
Claims (6)
1. the switching circuit of a dual input, it is characterized in that comprising the main switch circuit of power consumption equipment, described main switch circuit is by two-way input control, wherein a road is input as hardware signal input control circuit, another road is input as software signal input control circuit, the input of described hardware signal input control circuit is connected with the hardware switch of power consumption equipment, and the input of described software signal input control circuit is connected with the software output of power consumption equipment; After being connected, the output of the output of described hardware signal input control circuit and described software signal input control circuit is connected with the control end of described main switch circuit again.
2. the switching circuit of dual input according to claim 1, is characterized in that described main switch circuit is switch mosfet circuit, is parallel with voltage-stabiliser tube between the source electrode of the MOSFET pipe of described main switch circuit and gate pole.
3. the switching circuit of dual input according to claim 1, is characterized in that described hardware signal input control circuit and software signal input control circuit are transistor switching circuit.
4. the switching circuit of dual input according to claim 3, is characterized in that described hardware signal input control circuit and software signal input control circuit are all provided for the resistance of dividing potential drop.
5. the switching circuit of dual input according to claim 4, it is characterized in that the described resistance for dividing potential drop comprise be connected on the resistance of transistor base input and be connected in parallel on transistor base and emitter between resistance.
6. the power-off protection method of the circuit of a switch of applying dual input; when the hardware switch that it is characterized in that power consumption equipment is closed main switch circuit by hardware signal input control circuit, the software signal output of power consumption equipment turn-offs after controlling main switch circuit time delay preset time T by software signal input control circuit again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539303.6A CN103633977A (en) | 2013-11-05 | 2013-11-05 | Double-input switching circuit and power-off protecting method applying same circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539303.6A CN103633977A (en) | 2013-11-05 | 2013-11-05 | Double-input switching circuit and power-off protecting method applying same circuit |
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| Publication Number | Publication Date |
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| CN103633977A true CN103633977A (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310539303.6A Pending CN103633977A (en) | 2013-11-05 | 2013-11-05 | Double-input switching circuit and power-off protecting method applying same circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901664A (en) * | 2015-06-01 | 2015-09-09 | 深圳市安保科技有限公司 | Software and hardware combination power-on/off circuit and power-on/off method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795515A (en) * | 2010-01-05 | 2010-08-04 | 艾迪光电（杭州）有限公司 | Started overshoot current suppression circuit |
| US8040155B2 (en) * | 2009-01-30 | 2011-10-18 | East-West Innovation Corporation | Systems and methods of integrated circuit clocking |
| CN102324834A (en) * | 2011-09-28 | 2012-01-18 | 魏德米勒电联接国际贸易(上海)有限公司 | Be applied to the power switch tube drives circuit in the electronic security |
| CN102320275A (en) * | 2011-09-28 | 2012-01-18 | 重庆长安汽车股份有限公司 | Power-off delay circuit of hybrid control unit for electric automobile |
| CN102756701A (en) * | 2012-05-22 | 2012-10-31 | 奇瑞汽车股份有限公司 | Power delay system for automobile electric control unit |
-
2013
- 2013-11-05 CN CN201310539303.6A patent/CN103633977A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8040155B2 (en) * | 2009-01-30 | 2011-10-18 | East-West Innovation Corporation | Systems and methods of integrated circuit clocking |
| CN101795515A (en) * | 2010-01-05 | 2010-08-04 | 艾迪光电（杭州）有限公司 | Started overshoot current suppression circuit |
| CN102324834A (en) * | 2011-09-28 | 2012-01-18 | 魏德米勒电联接国际贸易(上海)有限公司 | Be applied to the power switch tube drives circuit in the electronic security |
| CN102320275A (en) * | 2011-09-28 | 2012-01-18 | 重庆长安汽车股份有限公司 | Power-off delay circuit of hybrid control unit for electric automobile |
| CN102756701A (en) * | 2012-05-22 | 2012-10-31 | 奇瑞汽车股份有限公司 | Power delay system for automobile electric control unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901664A (en) * | 2015-06-01 | 2015-09-09 | 深圳市安保科技有限公司 | Software and hardware combination power-on/off circuit and power-on/off method |
| CN104901664B (en) * | 2015-06-01 | 2018-11-09 | 深圳市安保科技有限公司 | A kind of on/off circuit and method for start-up and shutdown of software and hardware combining |
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Application publication date: 20140312 |