CN103683237A - Electrostatic protection circuit of mobile equipment - Google Patents
Electrostatic protection circuit of mobile equipment Download PDFInfo
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- CN103683237A CN103683237A CN201310612513.3A CN201310612513A CN103683237A CN 103683237 A CN103683237 A CN 103683237A CN 201310612513 A CN201310612513 A CN 201310612513A CN 103683237 A CN103683237 A CN 103683237A
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- triode
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Abstract
The invention discloses an electrostatic protection circuit of mobile equipment. A power source port is connected to collector electrodes of a triode T1 and a triode T2 simultaneously. A resistor R1 is connected between a base electrode and an emitting electrode of the triode T1, the emitting electrode of the triode T1 is connected to the power source, and a capacitor C1 is connected between the base electrode and the collector electrode of the triode T1. The collector electrode of the triode T1 is connected to an anode of a diode D1. A cathode of the diode D1 is connected to the power source. A resistor R2 is connected between a base electrode and an emitting electrode of the triode T2, an emitting electrode of the triode T2 is grounded, and a capacitor C2 is connected between the base electrode and the collector electrode of the triode T2. The collector electrode of the triode T2 is connected to a cathode of a diode D2. An anode of the diode D2 is grounded. The collector electrode of the triode T1 is connected with base electrodes of a triode T3 and a triode T4 simultaneously through a resistor R3. Collector electrodes of the triode T3 and the triode T4 are connected with each other. The electrostatic protection circuit has the advantages of reliable discharging of static electricity and simple structure.
Description
Technical field
The present invention relates to a kind of electrostatic discharge protection circuit, relate in particular a kind of electrostatic discharge protection circuit of mobile device.
Background technology
Along with scientific and technological development, the continuous renewal of technology, electronic equipment is more and more universal.For the ease of using, mobile electronic device is more and more.Mobile device is mostly pocket size, is handheld device.On circuit board due to mobile device inside, be integrated with a lot of responsive electronic devices and components.While making people use mobile device, due to human body static with it, especially in the winter time dry season, the static of human body easily causes damage to the electronic devices and components in mobile device.Because the most volume of mobile device is small and exquisite, too complicated circuit can bring burden to the volume of mobile device.So, on the port of mobile device, not only require it can effectively prevent the injury of static to internal electronic component, also the complexity of circuit is had to certain requirement.
Summary of the invention
The invention provides a kind of electrostatic discharge protection circuit of mobile device, it adopts many electrostatic leakage paths to release to static, guaranteed reliably the releasing of static, and circuit structure is simple, can save the layout area of circuit.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of electrostatic discharge protection circuit of mobile device, it comprises power port, described power port is connected on the collector electrode of triode T1 and the collector electrode of triode T2 simultaneously, between the base stage of described triode T1 and emitter, be connected with resistance R 1 and emitter is connected on power supply, between the base stage of described triode T1 and collector electrode, be connected with capacitor C 1, the collector electrode of described triode T1 is connected on the anode of diode D1, the negative electrode of described diode D1 is connected on power supply, between the base stage of described triode T2 and emitter, be connected with resistance R 2 and grounded emitter, between described triode T2 base stage and collector electrode, be connected with capacitor C 2, the collector electrode of described triode T2 is connected on the negative electrode of diode D2, the plus earth of described diode D2, the collector electrode of described triode T1 is connected with the base stage of triode T4 with the base stage of triode T3 by resistance R 3 simultaneously, the collector electrode of described triode T3 is connected with the collector electrode of triode T4, the emitter of described triode T3 is connected on power supply, the grounded emitter of described triode T4, described triode T1 and triode T3 are positive-negative-positive triode, described triode T2 and triode T4 are NPN type triode.
Further technical scheme is:
As preferably, described diode D2 and diode D1 are voltage stabilizing didoe.
Further, the resistance of described resistance R 1 and resistance R 2 equates.
Compared with prior art, the invention has the beneficial effects as follows:
1, of the present inventionly utilize electric capacity to be coupled static is effectively released, its electric capacity can utilize the electric capacity of a locking equipment to realize, and makes its circuit structure simple, effectively reduces circuit layout area.
2, many electrostatic leakage paths of employing of the present invention are released to static, have guaranteed, to reliably the releasing of static, effectively to have protected the electronic devices and components in mobile device.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.Embodiments of the present invention include but not limited to the following example.
[embodiment]
The electrostatic discharge protection circuit of a kind of mobile device as shown in Figure 1, it comprises power port, described power port is connected on the collector electrode of triode T1 and the collector electrode of triode T2 simultaneously, between the base stage of described triode T1 and emitter, be connected with resistance R 1 and emitter is connected on power supply, between the base stage of described triode T1 and collector electrode, be connected with capacitor C 1, the collector electrode of described triode T1 is connected on the anode of diode D1, the negative electrode of described diode D1 is connected on power supply, between the base stage of described triode T2 and emitter, be connected with resistance R 2 and grounded emitter, between described triode T2 base stage and collector electrode, be connected with capacitor C 2, the collector electrode of described triode T2 is connected on the negative electrode of diode D2, the plus earth of described diode D2, the collector electrode of described triode T1 is connected with the base stage of triode T4 with the base stage of triode T3 by resistance R 3 simultaneously, the collector electrode of described triode T3 is connected with the collector electrode of triode T4, the emitter of described triode T3 is connected on power supply, the grounded emitter of described triode T4, described triode T1 and triode T3 are positive-negative-positive triode, described triode T2 and triode T4 are NPN type triode.When circuit connects, the collector electrode of triode T3 is connected on the internal circuit of mobile device.In the present invention, triode T1, triode T2, triode T3, triode T4, diode D1 and diode D2 electrically provide many static leakage circuit according to static, have guaranteed reliably releasing to static.Resistance R 1 and resistance R 2 are respectively triode T1 and triode T2 provides conduction voltage drop, and triode T1 and triode T2 are normally worked.3 metering functions of resistance R, avoid that electric current is excessive to be damaged internal electronic component.Capacitor C 1 and capacitor C 2 can prevent the interference of power supply perturbation signal, the reliability of intensifier circuit.Capacitor C 1 and capacitor C 2 can effectively reduce the area of circuit layout by the parasitic capacitance on mobile device, and the area of whole electrostatic discharge protection circuit reduces.
In order to make the operation of this circuit more stable, described diode D2 and diode D1 are voltage stabilizing didoe, adopt voltage stabilizing didoe to provide path for electrostatic leakage, can protect to triode T1 and triode T2 stability that also can intensifier circuit.
Described resistance R 1 and the resistance of resistance R 2 equate.Resistance R 1 and resistance R 2 are respectively triode T1 and triode T2 provides conduction voltage drop, and it is symmetrical up and down that resistance becomes, and in order to make its performance more superior, described resistance R 1 and the resistance of resistance R 2 equate.
Be as mentioned above embodiments of the invention.The present invention is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (3)
1. the electrostatic discharge protection circuit of a mobile device, it is characterized in that: it comprises power port, described power port is connected on the collector electrode of triode T1 and the collector electrode of triode T2 simultaneously, between the base stage of described triode T1 and emitter, be connected with resistance R 1 and emitter is connected on power supply, between the base stage of described triode T1 and collector electrode, be connected with capacitor C 1, the collector electrode of described triode T1 is connected on the anode of diode D1, the negative electrode of described diode D1 is connected on power supply, between the base stage of described triode T2 and emitter, be connected with resistance R 2 and grounded emitter, between described triode T2 base stage and collector electrode, be connected with capacitor C 2, the collector electrode of described triode T2 is connected on the negative electrode of diode D2, the plus earth of described diode D2, the collector electrode of described triode T1 is connected with the base stage of triode T4 with the base stage of triode T3 by resistance R 3 simultaneously, the collector electrode of described triode T3 is connected with the collector electrode of triode T4, the emitter of described triode T3 is connected on power supply, the grounded emitter of described triode T4, described triode T1 and triode T3 are positive-negative-positive triode, described triode T2 and triode T4 are NPN type triode.
2. the electrostatic discharge protection circuit of a kind of mobile device according to claim 1, is characterized in that: described diode D2 and diode D1 are voltage stabilizing didoe.
3. the electrostatic discharge protection circuit of a kind of mobile device according to claim 1 and 2, is characterized in that: described resistance R 1 and the resistance of resistance R 2 equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612513.3A CN103683237A (en) | 2013-11-28 | 2013-11-28 | Electrostatic protection circuit of mobile equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612513.3A CN103683237A (en) | 2013-11-28 | 2013-11-28 | Electrostatic protection circuit of mobile equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103683237A true CN103683237A (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310612513.3A Pending CN103683237A (en) | 2013-11-28 | 2013-11-28 | Electrostatic protection circuit of mobile equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103683237A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297580A (en) * | 1999-01-19 | 2001-05-30 | 精工爱普生株式会社 | Circuit for protection against static electricity, and semiconductor integrated circuit using same |
| CN1420563A (en) * | 2001-11-16 | 2003-05-28 | 松下电器产业株式会社 | Semiconductor device |
| CN203278212U (en) * | 2013-06-14 | 2013-11-06 | 成都锐奕信息技术有限公司 | Card-type terminal electrostatic protection circuit |
-
2013
- 2013-11-28 CN CN201310612513.3A patent/CN103683237A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297580A (en) * | 1999-01-19 | 2001-05-30 | 精工爱普生株式会社 | Circuit for protection against static electricity, and semiconductor integrated circuit using same |
| CN1420563A (en) * | 2001-11-16 | 2003-05-28 | 松下电器产业株式会社 | Semiconductor device |
| CN203278212U (en) * | 2013-06-14 | 2013-11-06 | 成都锐奕信息技术有限公司 | Card-type terminal electrostatic protection circuit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |