CN203205866U - Antistatic circuit for mobile phone interface - Google Patents
Antistatic circuit for mobile phone interface Download PDFInfo
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- CN203205866U CN203205866U CN 201320221459 CN201320221459U CN203205866U CN 203205866 U CN203205866 U CN 203205866U CN 201320221459 CN201320221459 CN 201320221459 CN 201320221459 U CN201320221459 U CN 201320221459U CN 203205866 U CN203205866 U CN 203205866U
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- internal circuit
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Abstract
The utility model discloses an antistatic circuit for a mobile phone interface. The antistatic circuit includes a IO port and an internal circuit of a mobile phone; an electrostatic protection circuit is connected between the IO port and the internal circuit; the electrostatic protection circuit includes a diode D1, a diode D2, a diode D3, a diode D4 and a resistor R; two ends of the resistor R are respectively connected to the IO port and the internal circuit; one end of the resistor R, which is connected to the internal circuit, is connected to the anode of the diode D1; the anode of the diode D1 is connected to the cathode of the diode D2; the anode of the diode D2 and the anode of the diode D3 are connected and are both grounded; the cathode of the diode D3 and the cathode of diode D1 are both connected to a power supply; and the cathode of the diode D4 is connected to the anode of the diode D1, while the anode of the diode D4 is grounded. The antistatic circuit for the mobile phone interface is advantageous in that the circuit is protected against static electricity, is simple in structure, and is suitable for small and compact mobile phones.
Description
Technical field
The utility model relates to a kind of antistatic circuit, relates to a kind of antistatic circuit for the handset port place in particular.
Background technology
The popularity rate of mobile phone is very high now, and almost staff is one.It is indispensable as one of instrument of modern's affection exchange.Mobile phone often is placed in the trousers bag or takes.Because human body has electric charge, compare in dry season especially in the winter time, human body often produces static.When mobile phone was placed in the trousers bag or takes, it often was subjected to static electricity on human body's influence.Because the electronic devices and components of mobile phone inside are more, static is bigger to the injury of internal electronic component.Because the specifications design of mobile phone is more and more littler now, general antistatic circuit is not suitable for the more and more littler mobile phone of specification and uses.
The utility model content
The utility model provides a kind of antistatic circuit for the handset port place, and it can protect static, and circuit structure is simple, is suitable for the small and exquisite mobile phone of specification and uses.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
A kind of antistatic circuit for the handset port place; it comprises IO port and the internal circuit of mobile phone; be connected with electrostatic discharge protective circuit between described IO port and the internal circuit; described electrostatic discharge protective circuit comprises diode D1; diode D2; diode D3; diode D4 and resistance R; the two ends of described resistance R link to each other with internal circuit with the IO port respectively; and the end that resistance R links to each other with internal circuit is connected on the positive pole of diode D1; the positive pole of described diode D1 links to each other with the negative pole of diode D2; the positive pole of described diode D2 links to each other with the positive pole of diode D3 and while ground connection; the negative pole of the negative pole of described diode D3 and diode D1 is connected on the power supply simultaneously; the negative pole of described diode D4 links to each other with the positive pole of diode D1, the plus earth of described diode D4.
Further technical scheme is:
As preferably, described diode D4 is voltage stabilizing didoe.
Further, the Standard resistance range of described resistance R is 1000 ohm to 5000 ohm.
In the utility model, its metering function of resistance R prevents the electrostatic breakdown internal circuit.Electrostatic discharge protection circuit provides dual-electrode protecting circuit, and first order protective circuit comprises diode D1, diode D2 and diode D3.It provides 4 static leakage circuit that the internal circuit of mobile phone is protected, namely from power supply to the IO port, the IO port is to power supply, ground wire is to the IO port, the IO port is to ground wire.When carrying out electrostatic test, power end ground connection, the IO port adds positive electrostatic potential, and electrostatic induced current directly flows away from diode D1.If power end ground connection, the IO port adds negative electrostatic potential, and then electrostatic induced current flows through diode D2 successively, diode D3 and diode D1.If when ground wire grounded, the IO port adds positive electrostatic potential, and electrostatic induced current flows through diode D1 successively, diode D3, diode D2.If the IO port adds negative electrostatic potential, then electrostatic induced current flows away by diode D2.Second level protective circuit is voltage stabilizing didoe D4, and it carries out second protection to internal circuit, and diode is as the second class protection circuit, and it is convenient to simplify the annexation of circuit compared to the electronic devices and components of a plurality of pins.And the structure letter of this circuit is answered, and is convenient to the small and exquisite mobile phone of specification and uses.
Compared with prior art, the beneficial effects of the utility model are:
1, electrostatic discharge protection circuit of the present utility model adopts dual-electrode protecting circuit, effectively static is released, and prevents that static is to the destruction of mobile phone internal circuit.
2, circuit structure of the present utility model is simple, is applicable to that the small and exquisite mobile phone of specification uses.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.Execution mode of the present utility model includes but not limited to the following example.
[embodiment]
A kind of antistatic circuit for the handset port place as shown in Figure 1; it comprises IO port and the internal circuit of mobile phone; be connected with electrostatic discharge protective circuit between described IO port and the internal circuit; described electrostatic discharge protective circuit comprises diode D1; diode D2; diode D3; diode D4 and resistance R; the two ends of described resistance R link to each other with internal circuit with the IO port respectively; and the end that resistance R links to each other with internal circuit is connected on the positive pole of diode D1; the positive pole of described diode D1 links to each other with the negative pole of diode D2; the positive pole of described diode D2 links to each other with the positive pole of diode D3 and while ground connection; the negative pole of the negative pole of described diode D3 and diode D1 is connected on the power supply simultaneously; the negative pole of described diode D4 links to each other with the positive pole of diode D1, the plus earth of described diode D4.
Described diode D4 is voltage stabilizing didoe.
The Standard resistance range of described resistance R is 1000 ohm to 5000 ohm.
Be embodiment of the present utility model as mentioned above.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, all fall within the protection range of the present utility model.
Claims (3)
1. antistatic circuit that is used for the handset port place; it comprises IO port and the internal circuit of mobile phone; it is characterized in that: be connected with electrostatic discharge protective circuit between described IO port and the internal circuit; described electrostatic discharge protective circuit comprises diode D1; diode D2; diode D3; diode D4 and resistance R; the two ends of described resistance R link to each other with internal circuit with the IO port respectively; and the end that resistance R links to each other with internal circuit is connected on the positive pole of diode D1; the positive pole of described diode D1 links to each other with the negative pole of diode D2; the positive pole of described diode D2 links to each other with the positive pole of diode D3 and while ground connection; the negative pole of the negative pole of described diode D3 and diode D1 is connected on the power supply simultaneously; the negative pole of described diode D4 links to each other with the positive pole of diode D1, the plus earth of described diode D4.
2. a kind of antistatic circuit for the handset port place according to claim 1, it is characterized in that: described diode D4 is voltage stabilizing didoe.
3. a kind of antistatic circuit for the handset port place according to claim 2, it is characterized in that: the Standard resistance range of described resistance R is 1000 ohm to 5000 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320221459 CN203205866U (en) | 2013-04-27 | 2013-04-27 | Antistatic circuit for mobile phone interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320221459 CN203205866U (en) | 2013-04-27 | 2013-04-27 | Antistatic circuit for mobile phone interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205866U true CN203205866U (en) | 2013-09-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320221459 Expired - Fee Related CN203205866U (en) | 2013-04-27 | 2013-04-27 | Antistatic circuit for mobile phone interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203205866U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655997A (en) * | 2016-03-28 | 2016-06-08 | 成都晨越建设项目管理股份有限公司 | Cost auditing information management system |
| CN107316368A (en) * | 2017-06-30 | 2017-11-03 | 成都人人互动网络科技有限公司 | A kind of food-ordering device of meal ordering system |
| WO2020034069A1 (en) * | 2018-08-13 | 2020-02-20 | 深圳市汇顶科技股份有限公司 | Data interface, chip and chip system |
-
2013
- 2013-04-27 CN CN 201320221459 patent/CN203205866U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655997A (en) * | 2016-03-28 | 2016-06-08 | 成都晨越建设项目管理股份有限公司 | Cost auditing information management system |
| CN107316368A (en) * | 2017-06-30 | 2017-11-03 | 成都人人互动网络科技有限公司 | A kind of food-ordering device of meal ordering system |
| WO2020034069A1 (en) * | 2018-08-13 | 2020-02-20 | 深圳市汇顶科技股份有限公司 | Data interface, chip and chip system |
| US10855279B2 (en) | 2018-08-13 | 2020-12-01 | Shenzhen GOODIX Technology Co., Ltd. | Data interface, chip, and chip system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20140427 |