CN210007684U - kinds of switch switching circuit - Google Patents
kinds of switch switching circuit Download PDFInfo
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- CN210007684U CN210007684U CN201920911550.7U CN201920911550U CN210007684U CN 210007684 U CN210007684 U CN 210007684U CN 201920911550 U CN201920911550 U CN 201920911550U CN 210007684 U CN210007684 U CN 210007684U
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Abstract
The utility model discloses an switch switching circuit, including gear switch, including motionless end and a plurality of ends of moving, the motionless end is connected predetermined power end in order to insert the power, multichannel RC charge-discharge circuit, its end is connected in the node, and end is connected respectively in a plurality of ends of moving in addition, transistor switch circuit, its end connect in the node, end is connected in predetermined main control chip in addition, the utility model discloses a switch realizes that main chip can switch over the function with electricity, and the cost is lower.
Description
Technical Field
The utility model relates to an kinds of switch switching circuit.
Background
The user's demand for the function diversification and the easy and simple operation of electronic product is higher and higher, and the requirement for electronic product still includes multi-functional, function switching easy operation, support power-on switching (electrified switching) etc. simultaneously. In order to implement function switching, hardware reset is often performed on a plurality of main chips (main systems) to restart the main chips (main systems) so as to boot the main chips (main systems) to switch functions.
Currently, a mode of switching a main chip in a live state is usually realized by a switch and an MCU (processor), but the scheme has relatively high cost, and the requirement of a low-cost live switching circuit is more and more urgent in the face of increasingly severe competitive environment.
SUMMERY OF THE UTILITY MODEL
The utility model provides an kinds of switch transfer circuit has solved the problem that the electrified mode of switching is with high costs among the prior art.
The utility model provides an kinds of switch transfer circuit, include:
the gear switch comprises a fixed end and a plurality of movable ends, wherein the fixed end is connected with a preset power supply end to be connected with a power supply;
the end of the multi-path RC charge-discharge circuit is connected with the node, and the other end of the multi-path RC charge-discharge circuit is respectively connected with the plurality of movable ends;
and a transistor switch circuit, wherein a terminal of the transistor switch circuit is connected to the node, and a terminal of the transistor switch circuit is connected to a preset main control chip.
In the switch switching circuit of the present invention, the moving end includes th moving end, second moving end and third moving end.
In the switch switching circuit of the present invention, the switch switching circuit further comprises an th storage chip and a second storage chip, the th storage chip is connected to the th moving end, and the second storage chip is connected to the second moving end.
In the switch switching circuit of the present invention, the RC charging/discharging circuit comprises an th charging/discharging circuit, a second charging/discharging circuit and a third charging/discharging circuit.
In the switch switching circuit of the present invention, the th charging/discharging circuit includes a th capacitor and a th resistor, wherein a terminal of the th capacitor is connected to a terminal of the th resistor and the th movable terminal, and another terminal of the th capacitor is connected to the node;
the second charge-discharge circuit comprises a second capacitor and a second resistor, wherein an end of the second capacitor is connected to a end of the second resistor and the second movable end, and the other end of the second capacitor is connected to the node;
the third charge-discharge circuit comprises a third capacitor and a third resistor, wherein an end of the third capacitor is connected to a end of the third resistor and the third movable end, and the other end of the third capacitor is connected to the node.
The utility model discloses an among the switch switching circuit, transistor switch circuit includes fourth resistance, fifth resistance, transistor and sixth resistance, end of fourth resistance and end of fifth resistance all connect in the node, another end of fourth resistance connect in the base of transistor, the collecting electrode of transistor connect in end of sixth resistance, another end of sixth resistance connect in main control chip.
In the switch switching circuit of the present invention, the model of the gear switch is SK-13D 07.
In the switch switching circuit of the present invention, the model of the th memory chip and the second memory chip is FT24C 02A.
In the switch switching circuit of the present invention, the model of the main control chip is IP 175G.
In the switch switching circuit of the present invention, the other terminals of the transistor switching circuit are connected to the reset terminal of the main control chip.
The utility model discloses following beneficial effect has:
the main chip can be switched in an electrified mode through the switch, and the cost is low.
Drawings
The present invention will be described with reference to the accompanying drawings and examples in which steps are performed:
fig. 1 is a block diagram of kinds of switch switching circuits provided in the embodiment of the present invention;
fig. 2 is a circuit diagram of a shift switch provided in an embodiment of the present invention;
fig. 3 is a circuit diagram of an th memory chip according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a second memory chip according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a multi-path RC charging/discharging circuit and a transistor switching circuit according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a block diagram of kinds of switch switching circuits provided in the embodiment of the present invention, where the switch switching circuit includes a shift switch 1, a multi-path RC charging and discharging circuit 2, and a transistor switching circuit 3.
Referring to fig. 2 and fig. 2, the circuit diagram of the gear switch 1 according to the embodiment of the present invention is shown, the gear switch 1 includes a stationary end 11 and a plurality of movable ends, the stationary end 11 is connected to a preset power end to connect to a power supply, wherein the plurality of movable ends include -th movable end 12, second movable end 13 and third movable end 14, preferably, the gear switch 1 is SK-13d07, and the stationary end 11 is connected to the power supply through 3V3 power end.
Referring to fig. 3-4, fig. 3 is a circuit diagram of a th memory chip 4 provided by the embodiment of the present invention, fig. 4 is a circuit diagram of a second memory chip 5 provided by the embodiment of the present invention, the switch switching circuit further includes a th memory chip 4 and the second memory chip 5, the th memory chip 4 is connected to the th movable terminal 12, the second memory chip 5 is connected to the second movable terminal 13, preferably, the model of the th memory chip 4 and the model of the second memory chip 5 are both ft24c02a, as can be seen from the figure, the VCC terminal of the th memory chip 4 is connected to the th movable terminal 12 through 3V3_ VLAN, and the VCC terminal of the second memory chip 5 is connected to the second movable terminal 13 through 3V3_ CCTV.
Referring to fig. 5, fig. 5 is a circuit diagram of the multi-path RC charging and discharging circuit 2 and the transistor switch circuit 3 according to the embodiment of the present invention, an end of the multi-path RC charging and discharging circuit 2 is connected to the node 10, and another end of the multi-path RC charging and discharging circuit is respectively connected to a plurality of active ends, and specifically, the multi-path RC charging and discharging circuit 2 includes a th charging and discharging circuit 21, a second charging and discharging circuit 22, and a third charging and discharging circuit 23.
The th charge-discharge circuit 21 comprises a th capacitor C90 and a 0 th resistor R116, wherein an end of the th capacitor C90 is connected to a end of the th resistor R116 and the th movable end 12, the end is connected to the th movable end 12 through 3V3_ VLAN, and the other end of the th capacitor C90 is connected to the node 10.
The second charge and discharge circuit 22 includes a second capacitor C91 and a second resistor R115, wherein a end of the second capacitor C91 is connected to a end of the second resistor R115 and the second moving end 13, the second capacitor C91 is connected to the second moving end 13 through 3V3_ CCTV, and another end of the second capacitor C91 is connected to the node 10;
the third charge-discharge circuit 23 includes a third capacitor C92 and a third resistor R114, wherein a end of the third capacitor C92 is connected to a end of the third resistor R114 and the third active end 14, the third charge-discharge circuit is connected to the third active end 14 through 3V3_ Default, and another end of the third capacitor C92 is connected to the node 10.
Referring to fig. 5, a terminal of the transistor switch circuit 3 is connected to the node 10, and another terminal is connected to a preset main control chip 6, wherein the transistor switch circuit 3 includes a fourth resistor R117, a fifth resistor R108, a transistor Q1 and a sixth resistor R109, a terminal of the fourth resistor R117 and a terminal of the fifth resistor R108 are both connected to the node 10, another terminal of the fourth resistor R117 is connected to a base of the transistor Q1, a collector of the transistor Q1 is connected to a terminal of the sixth resistor R109, and another terminal of the sixth resistor R109 is connected to the main control chip 6, preferably, the main control chip 6 has a model number of IP175G, and thus, another terminal of the transistor switch circuit 3 is connected to a reset terminal RESETn of the main control chip 6.
The utility model discloses utilize last electric capacity in the twinkling of an eye to present the short circuit state, the electric capacity is full of and is presented this characteristic of open circuit state after the electric charge, realizes the realization to main control chip 6 reset function, go up the electric back, whole electrical power generating system provides the power to the main control chip 6 of the directional gear storage procedure of switch, the utility model discloses a theory of operation as follows:
the power supply charges an RC charge-discharge circuit capacitor which is conducted by the gear switch 1, the Vbe voltage of the transistor Q1 is larger than 0.7V due to the fact that the capacitor is in a short-circuit state in the charging moment, the transistor Q1 is conducted, the reset pin of the main control chip 6 of the main system is pulled down, the whole system is in a reset state, the capacitor is in an open circuit state after being charged and saturated, the Vbe voltage is smaller than 0.7V, the transistor Q1 is cut off, the main control chip 6 reads a chip program, and the whole system starts to operate.
When the gear switch 1 is switched to other gears, the originally charged RC charge-discharge circuit discharges rapidly, so that the main control chip 6 for storing the program stops working, meanwhile, the power supply charges the capacitor of the RC charge-discharge circuit which is switched on by the switch, the transistor is switched on again, the whole system is reset, the capacitor is waited for to be charged to be saturated, the transistor Q1 is cut off, the reset signal is pulled high, and the system works again.
By the RC charging and discharging formula of the prior art, i.e. during charging,
in the course of the discharge, the discharge is carried out,
wherein VoFor outputting voltage, the RC charge-discharge circuit is controlled to charge and maintain the conduction time of the transistor through the two formulas, so that the main system reset time is sufficient, and meanwhile, the RC discharge time is smaller than the RC charge time of the switching gear when the gear switch 1 is switched, and the switching effectiveness is ensured.
The utility model discloses an utilize the last electric capacity in the twinkling of an eye to present the short circuit state, present this characteristics of open circuit state after the electric capacity is full of electric charge, combine transistor Q1 to switch on and cut off the characteristic, realize carrying out the function switching that resets under the electrified environment, accomplish with low costs, easy and simple to handle.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1, A switching circuit, comprising:
the gear switch comprises a fixed end and a plurality of movable ends, wherein the fixed end is connected with a preset power supply end to be connected with a power supply;
the end of the multi-path RC charge-discharge circuit is connected with the node, and the other end of the multi-path RC charge-discharge circuit is respectively connected with the plurality of movable ends;
and a transistor switch circuit, wherein a terminal of the transistor switch circuit is connected to the node, and a terminal of the transistor switch circuit is connected to a preset main control chip.
2. The switch-switching circuit of claim 1, wherein the plurality of moving terminals includes a th moving terminal, a second moving terminal and a third moving terminal.
3. The switch-switching circuit of claim 2, further comprising an th memory chip and a second memory chip, wherein the th memory chip is connected to the th movable terminal, and the second memory chip is connected to the second movable terminal.
4. The switch-over circuit of claim 2, wherein the plurality of RC charge-discharge circuits comprises an th charge-discharge circuit, a second charge-discharge circuit and a third charge-discharge circuit.
5. The switch-switching circuit of claim 4, wherein the th charge/discharge circuit comprises a th capacitor and a th resistor, wherein a end of the th capacitor is connected to a end of the th resistor and the th movable end, and another end of the th capacitor is connected to the node;
the second charge-discharge circuit comprises a second capacitor and a second resistor, wherein an end of the second capacitor is connected to a end of the second resistor and the second movable end, and the other end of the second capacitor is connected to the node;
the third charge-discharge circuit comprises a third capacitor and a third resistor, wherein an end of the third capacitor is connected to a end of the third resistor and the third movable end, and the other end of the third capacitor is connected to the node.
6. The switch switching circuit of any of claims 1-5, wherein the transistor switching circuit comprises a fourth resistor, a fifth resistor, a transistor and a sixth resistor, wherein a terminal of the fourth resistor and a terminal of the fifth resistor are both connected to the node, another terminal of the fourth resistor is connected to the base of the transistor, the collector of the transistor is connected to a terminal of the sixth resistor, and another terminal of the sixth resistor is connected to the main control chip.
7. The switch-switching circuit according to claim 1, wherein the range switch is of the type SK-13D 07.
8. The switch-switching circuit of claim 3, wherein the model numbers of the th and second memory chips are both FT24C 02A.
9. The switch-switching circuit according to claim 1, wherein the model of the master control chip is IP 175G.
10. The switch-over circuit according to claim 1 or 9, wherein the other terminal of the transistor switch circuit is connected to the reset terminal of the main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920911550.7U CN210007684U (en) | 2019-06-17 | 2019-06-17 | kinds of switch switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920911550.7U CN210007684U (en) | 2019-06-17 | 2019-06-17 | kinds of switch switching circuit |
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| Publication Number | Publication Date |
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| CN210007684U true CN210007684U (en) | 2020-01-31 |
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| CN201920911550.7U Active CN210007684U (en) | 2019-06-17 | 2019-06-17 | kinds of switch switching circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381488A (en) * | 2021-08-13 | 2021-09-10 | 深圳市永联科技股份有限公司 | Charging method and charging device |
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2019
- 2019-06-17 CN CN201920911550.7U patent/CN210007684U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381488A (en) * | 2021-08-13 | 2021-09-10 | 深圳市永联科技股份有限公司 | Charging method and charging device |
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