CN203734639U - Electronic device and antistatic reset circuit thereof - Google Patents
Electronic device and antistatic reset circuit thereof Download PDFInfo
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- CN203734639U CN203734639U CN201320858404.5U CN201320858404U CN203734639U CN 203734639 U CN203734639 U CN 203734639U CN 201320858404 U CN201320858404 U CN 201320858404U CN 203734639 U CN203734639 U CN 203734639U
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- reset
- resistance
- antistatic
- reset signal
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Abstract
The utility model discloses an electronic device and an antistatic reset circuit thereof. The antistatic reset circuit comprises a voltage division module, a reset signal module, a reset switch and a diode. A first electric potential terminal of the voltage division module is connected with a positive electrode of the diode. A second electric potential terminal of the voltage division module is connected with a reset driving terminal of the reset signal module. A negative electrode of the diode is in a grounding connection manner through the reset switch. When the reset switch is closed, the voltage of the first electric potential terminal is drawn to low, the voltage of the second electric potential terminal reduces and is less than break-over voltage of the reset driving terminal, and a reset signal output end outputs a reset signal. The static electricity generated by the reset switch of the antistatic reset circuit of the electronic device has no influence on normal work of the whole antistatic reset circuit. The reset switch can be arranged on a housing to be more conveniently operated by users. In addition, the reset switch can isolate static electricity without use of a rubber layer, and the use of the rubber material and the cost are reduced.
Description
Technical field
The utility model relates to reset circuit technology, particularly a kind of electronic equipment and antistatic reset circuit thereof.
Background technology
Along with the develop rapidly of electron trade, the electronic product of more and more kinds appears on the market.Due to the difference of electronic product performance and the difference of user's service condition, each electronic product (for example, MP4, mobile phone, wireless router, PSP game machine etc.) (for example in use there will be some common unusual conditions unavoidably, electronic product deadlock, middle virus etc.), in order to allow user can solve timely voluntarily common unusual condition, to recover normal use, in electronic product, conventionally there is reset circuit and be provided with the reset function key of carrying out reset operation.Can make electronic product reset to restart or factory reset by pressing reset function key.
When reset function key is realized reset operation, make reset circuit produce the corresponding signal of telecommunication to be given to the reset terminal of processor by pressing reset function key, thereby processor control electronic product is resetted.Because electronic product casing easily produces static, in order to prevent that static from passing to the reset terminal of processor and producing reset operation through reset function key by mistake, conventionally the reset key of electronic product is arranged on to electronic product inside, and rubber layer is set on reset function key with every static, on shell, corresponding reset function key position is opened aperture, when this electronic product need to reset, insert in aperture to press reset function key by contact pin (or similar aciculiform) instrument.Because the reset of electronic product need be by contact pin instrument, user can not carry this class instrument conventionally, while causing electronic product to occur common unusual condition, can not solve in time, causes user's inconvenience.
Utility model content
Main purpose of the present utility model is for providing a kind of antistatic and reset operation electronic equipment and antistatic reset circuit thereof more easily.
The utility model proposes a kind of antistatic reset circuit, comprise division module, reset signal module, reset switch and diode, described division module has the first potential end and the second potential end, the voltage of described the second potential end is the dividing potential drop of the voltage to described the first potential end, and described reset signal module comprises reset drives end and reset signal output;
The first potential end of described division module connects the positive pole of described diode, and the second potential end of described division module connects the reset drives end of described reset signal module; The negative pole of described diode is through described reset switch ground connection; Described in when described reset switch is closed, the voltage of the first potential end is dragged down, the lower voltage of described the second potential end and be less than the conducting voltage of described reset drives end, the reset signal output output reset signal of described reset signal module.
Preferably, described division module comprises the first resistance, the second resistance and the 3rd resistance that are connected on successively between power supply and ground, one end that described the first resistance is connected with described the second resistance is described the first potential end, and one end that described the second resistance is connected with described the 3rd resistance is described the second potential end.
Preferably, described reset signal module comprises the 4th resistance, the 5th resistance, the first switching tube and second switch pipe;
The trigger end of described the first switching tube is described reset drives end, and the first conduction terminal of described the first switching tube connects power supply, the second conduction terminal ground connection of described the first switching tube through described the 4th resistance;
The trigger end of described second switch pipe connects the first conduction terminal of described the first switching tube, the first conduction terminal of described second switch pipe connects power supply through described the 5th resistance, the second conduction terminal ground connection of described second switch pipe, the first conduction terminal of described second switch pipe is described reset signal output.
Preferably, described the first switching tube is NPN type triode, and the trigger end of described the first switching tube is base stage, and the first conduction terminal of described the first switching tube is collector electrode, and the second conduction terminal of described the first switching tube is emitter;
Described second switch pipe is NPN type triode, and the trigger end of described second switch pipe is base stage, and the first conduction terminal of described second switch pipe is collector electrode, and the second conduction terminal of described second switch pipe is emitter.
Preferably, the trigger end of the negative pole of described diode, described the first switching tube and the trigger end of described second switch pipe are also respectively through a bypass capacity earth.
Preferably, also comprise the reseting interface expansion module being connected with described reset signal output.
Preferably, described reseting interface expansion module comprises the 6th resistance, the first electric capacity and reset signal expansion end; One end of described the 6th resistance connects power supply, and the other end of described the 6th resistance connects respectively one end and the described reset signal expansion end of described the first electric capacity, and the other end of described the first electric capacity connects described reset signal output.
Preferably, described reset switch is for touching not locking switch.
The utility model also proposes a kind of electronic equipment, comprises antistatic reset circuit as above.
Electronic equipment of the present utility model and antistatic reset circuit thereof, be connected diode between its reset switch and reset signal module.In the time having positive static on reset switch, because diode has the unidirectional general character, positive static can not make diode current flow and outside being blocked in, can not enter the normal work that affects reset signal module in reset signal module; In the time having negative static on reset switch, the cathode voltage of diode is for negative, the cathode voltage of diode is the conducting voltage that the cathode voltage of diode adds diode, namely the cathode voltage of diode is necessarily less than the conducting voltage of diode, the voltage of the second potential end is less than the conducting voltage of diode, so the voltage of the first potential end is less than the conducting voltage of reset drives end, can not cause the reset signal module output reset signal of delaying work.Therefore, the static producing on its reset switch is had no effect to the normal work of whole antistatic reset circuit, reset switch can be arranged on shell, the user's operation of being more convenient for; Without adopting rubber layer to make reset switch isolation static, reduce the use of elastomeric material simultaneously, reduce costs.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams in the utility model antistatic reset circuit one embodiment;
Fig. 2 is the circuit theory diagrams in the utility model antistatic reset circuit two embodiment.
Realization, functional characteristics and the advantage of the utility model object, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As depicted in figs. 1 and 2, Fig. 1 is the circuit theory diagrams in the utility model antistatic reset circuit one embodiment; Fig. 2 is the circuit theory diagrams in the utility model antistatic reset circuit two embodiment.
With reference to Fig. 1, the antistatic reset circuit that this embodiment proposes, comprise division module 10, reset signal module 20, reset switch K and diode D1, division module 10 has the first potential end V1 and the second potential end V2, the voltage of the second potential end V2 is the dividing potential drop of the voltage to the first potential end V1, and reset signal module 20 comprises reset drives end X and reset signal output S1; The first potential end V1 of division module 10 connects the positive pole of diode D1, and the second potential end V2 of division module 10 connects the reset drives end X of reset signal module 20; The negative pole of diode D1 is through reset switch K ground connection GND.
In the time that reset switch K is closed, diode D1 conducting, therefore the voltage swing of diode D1 positive pole just by clamper in the turn-on voltage (being generally 0.7V) of diode D1, the voltage swing of the first potential end V1 is pulled low to the turn-on voltage of diode D1; Because the voltage of the second potential end V2 is the dividing potential drop of the voltage to the first potential end V1, therefore, the voltage of the first potential end V1 is less than the voltage of the second potential end V2 again, and the reduction of the voltage of voltage follow the second potential end V2 of the second potential end V2 and reducing; So in the time that reset switch K is closed, the lower voltage of the first potential end V1 is to the conducting voltage that is less than reset drives end X, reset signal output S1 exports reset signal, starts reset circuit.
In the time that reset switch K is disconnected by closure state, not conducting of diode D1, remove the voltage clamping to the first potential end V1, the voltage of the first potential end V1 raises, the voltage of voltage follow the first potential end V1 of the second potential end V2 raises and raises, thereby the voltage of the second potential end V2 is greater than the conducting voltage of reset drives end X, reset signal output S1 does not export reset signal, and now reset circuit does not start.
The antistatic reset circuit of the present embodiment, is connected diode D1 between reset switch K and reset signal module 20.In the time having positive static on reset switch K, because diode D1 has the unidirectional general character, positive static can not make diode D1 conducting and outside being blocked in, can not enter the normal work that affects reset signal module 20 in reset signal module 20.In the time having negative static on reset switch K, the cathode voltage of diode D1 is for negative, the cathode voltage of diode D1 is the conducting voltage that the cathode voltage of diode D1 adds diode D1, namely the cathode voltage of diode D1 is necessarily less than the conducting voltage of diode D1, the voltage of the second potential end V2 is less than the conducting voltage of diode D1, so the voltage of the first potential end V1 is less than the conducting voltage of reset drives end X, can not cause the reset signal module 20 output reset signal of delaying work.
As from the foregoing, the antistatic reset circuit of the present embodiment is for existing reset circuit, generation static on the present embodiment reset switch K is had no effect to the normal work of whole antistatic reset circuit, adopt the electronic equipment of the antistatic reset circuit of the present embodiment reset switch K can be arranged on shell, the user's operation of being more convenient for; Without adopting rubber layer to make reset switch K isolation static, reduce the use of elastomeric material simultaneously, reduce costs.
Further, see figures.1.and.2, division module 10 comprises the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 that are connected on successively between power supply VCC and ground GND, one end that the first resistance R 1 is connected with the second resistance R 2 is the first potential end V1, and one end that the second resistance R 2 is connected with the 3rd resistance R 3 is the second potential end V2.
It is the voltage sum in voltage and the 3rd resistance R 3 in the second resistance R 2 that the voltage of the first potential end V1 equals, and the voltage of the second potential end V2 is the voltage in the 3rd resistance R 3.In the time that reset switch K is closed, diode D1 conducting; Now, being the second resistance R 2 connects in parallel with diode D1 after the 3rd resistance R 3, voltage sum (voltage of the first potential end V1) in voltage in the second resistance R 2 and the 3rd resistance R 3 equals the conducting voltage of diode D1, and the voltage of the first potential end V1 is that clamper is in the conducting voltage of diode D1.The voltage of the second potential end V2 is the dividing potential drop of the voltage of the 3rd resistance R 3 to the second potential end V2.In the time that reset switch K disconnects, diode D1 disconnects, and the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 form one article of series loop, and the voltage of the first potential end V1 is the second resistance R 2 dividing potential drop to power supply VCC together with the 3rd resistance R 3.In the time having negative static on reset switch K, negative static consumes and discharges through the first resistance R 1.
Further, see figures.1.and.2, reset signal module 20 comprises the 4th resistance R 4, the 5th resistance R 5, the first switching tube Q1 and second switch pipe Q2.The trigger end of the first switching tube Q1 is reset drives end X, and the first conduction terminal of the first switching tube Q1 connects power supply VCC through the 4th resistance R 4, the second conduction terminal ground connection GND of the first switching tube Q1.The trigger end of second switch pipe Q2 connects the first conduction terminal of the first switching tube Q1, the first conduction terminal of second switch pipe Q2 connects power supply VCC through the 5th resistance R 5, the second conduction terminal ground connection GND of second switch pipe Q2, the first conduction terminal of second switch pipe Q2 is reset signal output S1.The negative pole of diode D1 is also through the first shunt capacitance C2 ground connection GND, and the trigger end of the first switching tube Q1 is also through the second shunt capacitance C3 ground connection GND, and the trigger end of second switch pipe Q2 is also through the 3rd shunt capacitance C4 ground connection GND.
The conducting voltage of reset drives end X i.e. the conducting voltage of the first switching tube Q1.The first switching tube Q1 of the present embodiment and second switch pipe Q2 are NPN type triode; Corresponding, the trigger end of the first switching tube Q1 is base stage, and the first conduction terminal of the first switching tube Q1 is collector electrode, and the second conduction terminal of the first switching tube Q1 is emitter; The trigger end of second switch pipe Q2 is base stage, and the first conduction terminal of second switch pipe Q2 is collector electrode, and the second conduction terminal of second switch pipe Q2 is emitter.Certainly, the first switching tube Q1 of the present embodiment and second switch pipe Q2 can also be N-channel MOS pipe, because the cost of triode is lower compared to metal-oxide-semiconductor, and the therefore preferred triode of the present embodiment.
The antistatic reset circuit of the present embodiment adopts low level to reset.The operation principle of reset signal module 20 is:
In the time that reset switch K is closed, the voltage of the second potential end V2 is less than the conducting voltage of diode D1, so the voltage of the second potential end V2 is less than the conducting voltage of the first switching tube Q1, the trigger end of the first switching tube Q1 is less than the conducting voltage of the first switching tube Q1, the first switching tube Q1 cut-off.Thereby the first conduction terminal of the first switching tube Q1 is not communicated with its second conduction terminal, the second conduction terminal is high level, and namely the trigger end of second switch pipe Q2 is high level; Due to the second conduction terminal ground connection GND of second switch pipe Q2, so the voltage difference between the trigger end of second switch pipe Q2 and its second conduction terminal is greater than the conducting voltage of second switch pipe Q2, the conducting of second switch pipe Q2, the first conduction terminal of second switch pipe Q2 is low level, so reset signal output S1 is low level, namely produces reset signal.
In the time that reset switch K disconnects, the voltage of the second potential end V2 is greater than the conducting voltage of reset drives end X, the first switching tube Q1 conducting, the trigger end of second switch pipe Q2 is low level, second switch pipe Q2 cut-off, the first conduction terminal of second switch pipe Q2 is high level, and reset signal output S1 is high level, does not namely produce reset signal.
Further, with reference to 1 and Fig. 2, realize difference in functionality because a lot of electronic equipments need multiple reseting interfaces to coordinate, for example, the reset that some electronic equipments need to be controlled electronic equipment by reset switch K is restarted and restoring data.Therefore, the antistatic reset circuit of the present embodiment is also provided with the reseting interface expansion module 30 being connected with reset signal output S1, and reseting interface expansion module 30 comprises the 6th resistance R 6, the first capacitor C 1 and reset signal expansion end S2; One end of the 6th resistance R 6 connects power supply VCC, the other end of the 6th resistance R 6 connects respectively one end and the reset signal expansion end S2 of the first capacitor C 1, and the other end of the first capacitor C 1 connects the first conduction terminal (connecting reset signal output S1) of second switch pipe Q2.
Further, for user uses conveniently, the reset switch K of the present embodiment adopts and touches not locking switch.Be appreciated that touching not locking switch is a preference of the present embodiment, reset switch K can also adopt other types switch.
The utility model further proposes a kind of electronic equipment, comprises antistatic reset circuit, and this antistatic reset circuit can comprise the scheme in above-mentioned arbitrary embodiment, and its detailed structure can be with reference to previous embodiment, and therefore not to repeat here.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (9)
1. an antistatic reset circuit, it is characterized in that, comprise division module, reset signal module, reset switch and diode, described division module has the first potential end and the second potential end, the voltage of described the second potential end is the dividing potential drop of the voltage to described the first potential end, and described reset signal module comprises reset drives end and reset signal output;
The first potential end of described division module connects the positive pole of described diode, and the second potential end of described division module connects the reset drives end of described reset signal module; The negative pole of described diode is through described reset switch ground connection;
Described in when described reset switch is closed, the voltage of the first potential end is dragged down, the lower voltage of described the second potential end and be less than the conducting voltage of described reset drives end, the reset signal output output reset signal of described reset signal module.
2. antistatic reset circuit according to claim 1, it is characterized in that, described division module comprises the first resistance, the second resistance and the 3rd resistance that are connected on successively between power supply and ground, one end that described the first resistance is connected with described the second resistance is described the first potential end, and one end that described the second resistance is connected with described the 3rd resistance is described the second potential end.
3. antistatic reset circuit according to claim 1, is characterized in that, described reset signal module comprises the 4th resistance, the 5th resistance, the first switching tube and second switch pipe;
The trigger end of described the first switching tube is described reset drives end, and the first conduction terminal of described the first switching tube connects power supply, the second conduction terminal ground connection of described the first switching tube through described the 4th resistance;
The trigger end of described second switch pipe connects the first conduction terminal of described the first switching tube, the first conduction terminal of described second switch pipe connects power supply through described the 5th resistance, the second conduction terminal ground connection of described second switch pipe, the first conduction terminal of described second switch pipe is described reset signal output.
4. antistatic reset circuit according to claim 3, it is characterized in that, described the first switching tube is NPN type triode, and the trigger end of described the first switching tube is base stage, the first conduction terminal of described the first switching tube is collector electrode, and the second conduction terminal of described the first switching tube is emitter;
Described second switch pipe is NPN type triode, and the trigger end of described second switch pipe is base stage, and the first conduction terminal of described second switch pipe is collector electrode, and the second conduction terminal of described second switch pipe is emitter.
5. antistatic reset circuit according to claim 3, is characterized in that, the trigger end of the negative pole of described diode, the trigger end of described the first switching tube and described second switch pipe is also respectively through a bypass capacity earth.
6. according to the antistatic reset circuit described in any one in claim 1-5, it is characterized in that, also comprise the reseting interface expansion module being connected with described reset signal output.
7. antistatic reset circuit according to claim 6, is characterized in that, described reseting interface expansion module comprises the 6th resistance, the first electric capacity and reset signal expansion end; One end of described the 6th resistance connects power supply, and the other end of described the 6th resistance connects respectively one end and the described reset signal expansion end of described the first electric capacity, and the other end of described the first electric capacity connects described reset signal output.
8. antistatic reset circuit according to claim 1, is characterized in that, described reset switch is for touching not locking switch.
9. an electronic equipment, is characterized in that, comprises the antistatic reset circuit as described in any one in claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858404.5U CN203734639U (en) | 2013-12-24 | 2013-12-24 | Electronic device and antistatic reset circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858404.5U CN203734639U (en) | 2013-12-24 | 2013-12-24 | Electronic device and antistatic reset circuit thereof |
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| CN203734639U true CN203734639U (en) | 2014-07-23 |
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| CN201320858404.5U Expired - Fee Related CN203734639U (en) | 2013-12-24 | 2013-12-24 | Electronic device and antistatic reset circuit thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953992A (en) * | 2015-06-03 | 2015-09-30 | 广东欧珀移动通信有限公司 | Reset circuit and electronic equipment |
| CN106406480A (en) * | 2016-11-11 | 2017-02-15 | 上海雍敏信息科技有限公司 | High-level effective switch reset circuit |
| CN106708228A (en) * | 2016-11-11 | 2017-05-24 | 上海雍敏信息科技有限公司 | Low-level effective switch reset circuit |
| CN106877078A (en) * | 2017-02-23 | 2017-06-20 | 惠州市德赛工业研究院有限公司 | Terminal connection circuit and its method for wearable device |
| CN112615610A (en) * | 2020-12-03 | 2021-04-06 | 北京紫光安芯科技有限公司 | Door lock system and reset circuit thereof |
| CN113325779A (en) * | 2021-06-07 | 2021-08-31 | 沈阳铁路信号有限责任公司 | Reset signal safety output circuit and implementation method |
-
2013
- 2013-12-24 CN CN201320858404.5U patent/CN203734639U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953992A (en) * | 2015-06-03 | 2015-09-30 | 广东欧珀移动通信有限公司 | Reset circuit and electronic equipment |
| CN104953992B (en) * | 2015-06-03 | 2017-08-08 | 广东欧珀移动通信有限公司 | A kind of reset circuit and electronic equipment |
| CN106406480A (en) * | 2016-11-11 | 2017-02-15 | 上海雍敏信息科技有限公司 | High-level effective switch reset circuit |
| CN106708228A (en) * | 2016-11-11 | 2017-05-24 | 上海雍敏信息科技有限公司 | Low-level effective switch reset circuit |
| CN106406480B (en) * | 2016-11-11 | 2024-01-12 | 深圳市万阳光电有限公司 | High-level effective switch reset circuit |
| CN106877078A (en) * | 2017-02-23 | 2017-06-20 | 惠州市德赛工业研究院有限公司 | Terminal connection circuit and its method for wearable device |
| CN112615610A (en) * | 2020-12-03 | 2021-04-06 | 北京紫光安芯科技有限公司 | Door lock system and reset circuit thereof |
| CN113325779A (en) * | 2021-06-07 | 2021-08-31 | 沈阳铁路信号有限责任公司 | Reset signal safety output circuit and implementation method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20171224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |