CN103269062A - Mobile phone with double functions of preventing surges and static electricity - Google Patents
Mobile phone with double functions of preventing surges and static electricity Download PDFInfo
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- CN103269062A CN103269062A CN2013101775690A CN201310177569A CN103269062A CN 103269062 A CN103269062 A CN 103269062A CN 2013101775690 A CN2013101775690 A CN 2013101775690A CN 201310177569 A CN201310177569 A CN 201310177569A CN 103269062 A CN103269062 A CN 103269062A
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- 230000003068 static effect Effects 0.000 title claims abstract description 23
- 230000005611 electricity Effects 0.000 title abstract 6
- 230000005669 field effect Effects 0.000 claims description 18
- 230000006378 damage Effects 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The invention discloses a mobile phone with double functions of preventing surges and static electricity. The mobile phone comprises a power interface of the mobile phone and an internal circuit interface of the mobile phone, wherein a static electricity preventing circuit and a surge preventing circuit are connected between the power interface and the internal circuit interface. The mobile phone with the double functions of preventing the surges and the static electricity has the advantages that the circuit structure is simple, the static electricity and the surges act on the mobile phone and can be completely discharged, and damage to internal electronic components of the mobile phone by the static electricity and the surges is avoided.
Description
Technical field
The present invention relates to a kind of mobile phone, relate to a kind of mobile phone with surge and static double protection function in particular.
Background technology
Mobile phone is as the important tool of people's contact and affection exchange, and its popularity rate is increasing, and almost staff is one.Mobile phone charging interface and the data transmission interface of present most of mobile phones all are same interface.In dry and windy autumn, people's health has static more, because the electronic devices and components of mobile phone inside are more, the static very easily interior electronic devices and components of adversary's machine damages.And cellular phone power supplies is at the strong pulse of just having opened that can produce at that moment, i.e. surge, and the internal circuit that he makes mobile phone probably burns out in a flash surge, punctures as PN junction electric capacity, and resistance blows etc.And the electronic devices and components of the inside of mobile phone are more, and in start in a flash, its pulse is to extremely big of the injury of internal circuit.
Summary of the invention
The invention provides a kind of mobile phone with surge and static double protection function, its circuit structure is simple, can release fully to the static and the surge that act on mobile phone, avoids static and surge that the electronic devices and components of mobile phone inside are damaged.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of mobile phone with surge and static double protection function, it comprises power interface and the internal circuit interface of mobile phone, be connected with electrostatic discharge protection circuit and anti-surge circuit between described power interface and the internal circuit interface, described electrostatic discharge protection circuit comprises diode D1, diode D2 and triode; The positive pole of described diode D1 is connected on the collector electrode of triode, and negative pole is connected on the VDD; The base stage of described triode links to each other with emitter and while ground connection; The two ends of described diode D2 are connected on the emitter of VDD and triode; Described anti-surge circuit comprises resistance R 3, comparator and field effect transistor; Two inputs of described comparator are connected to the two ends of resistance R 3, and output is connected on the grid of field effect transistor; The drain electrode of described field effect transistor is connected an end of resistance R 3, and the other end of resistance R 3 is connected on the positive pole of diode D1, and the source electrode of described field effect transistor is connected on the internal circuit interface.
The present invention is connected with electrostatic discharge protection circuit and anti-surge circuit between the power interface of mobile phone and internal circuit.When electrostatic interaction during in the power interface of mobile phone, diode D1, triode and diode D2 electrically provide many paths of releasing so that electrostatic leakage is fallen respectively according to static.Because triode is with low cost, stable strong, so adopt triode at earth terminal.Diode D2 not only plays pressure stabilization function, also provides path to electrostatic leakage.Comparator detects the voltage at resistance R 3 two ends, and when the moment of starting shooting had surge to produce, when electric current was excessive, the pressure drop at resistance R 3 two ends increased, and makes comparator output signal stopcock device, reaches the purpose that surge is released.
Further technical scheme is:
Also be connected with the surge delay circuit on the described anti-surge protection circuit, described surge delay circuit comprises resistance R 2 and electric capacity, and an end of described resistance R 2 is connected on the positive pole of diode D1, and the other end links to each other with electric capacity, and the other end ground connection of electric capacity.Connect the surge delay circuit at surge protection circuit, do the charging buffer structure with resistance R 2 and electric capacity, to postpone the surge time, so that anti-surge protection circuit responds the time.
Also be connected with current-limiting circuit on the described power interface, described current-limiting circuit comprises resistance R 1, and the two ends of described resistance R 1 are connected on the positive pole of power interface and diode D1.1 metering function of resistance R avoids the excessive internal circuit to mobile phone of electric current to damage.
Described triode is the positive-negative-positive triode.
Described field effect transistor is P type field effect transistor.
Compared with prior art, the invention has the beneficial effects as follows:
1, circuit structure letter of the present invention is answered, and is convenient to realization and with low cost.
2, the present invention releases fully to static and the surge that can will act on mobile phone, and the mobile phone internal circuit is carried out static and surge duplicate protection, effectively protects the electronic devices and components of mobile phone inside.
Description of drawings
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
The present invention is further illustrated below in conjunction with accompanying drawing.Embodiments of the present invention include but not limited to the following example.
[embodiment]
A kind of mobile phone with surge and static double protection function as shown in Figure 1, it comprises power interface 1 and the internal circuit interface 2 of mobile phone, be connected with electrostatic discharge protection circuit and anti-surge circuit between described power interface 1 and the internal circuit interface 2, described electrostatic discharge protection circuit comprises diode D1, diode D2 and triode; The positive pole of described diode D1 is connected on the collector electrode of triode, and negative pole is connected on the VDD; The base stage of described triode links to each other with emitter and while ground connection; The two ends of described diode D2 are connected on the emitter of VDD and triode; Described anti-surge circuit comprises resistance R 3, comparator and field effect transistor; Two inputs of described comparator are connected to the two ends of resistance R 3, and output is connected on the grid of field effect transistor; The drain electrode of described field effect transistor is connected an end of resistance R 3, and the other end of resistance R 3 is connected on the positive pole of diode D1, and the source electrode of described field effect transistor is connected on the internal circuit interface 2.
Also be connected with the surge delay circuit on the described anti-surge protection circuit, described surge delay circuit comprises resistance R 2 and electric capacity, and an end of described resistance R 2 is connected on the positive pole of diode D1, and the other end links to each other with electric capacity, and the other end ground connection of electric capacity.
Also be connected with current-limiting circuit on the described power interface 1, described current-limiting circuit comprises resistance R 1, and the two ends of described resistance R 1 are connected on the positive pole of power interface 1 and diode D1.
Described triode is the positive-negative-positive triode.
Described field effect transistor is P type field effect transistor.
Be embodiments of the invention as mentioned above.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, all falls within protection scope of the present invention.
Claims (5)
1. mobile phone with surge and static double protection function, it comprises power interface 1 and the internal circuit interface 2 of mobile phone, it is characterized in that: be connected with electrostatic discharge protection circuit and anti-surge circuit between described power interface 1 and the internal circuit interface 2, described electrostatic discharge protection circuit comprises diode D1, diode D2 and triode; The positive pole of described diode D1 is connected on the collector electrode of triode, and negative pole is connected on the VDD; The base stage of described triode links to each other with emitter and while ground connection; The two ends of described diode D2 are connected on the emitter of VDD and triode; Described anti-surge circuit comprises resistance R 3, comparator and field effect transistor; Two inputs of described comparator are connected to the two ends of resistance R 3, and output is connected on the grid of field effect transistor; The drain electrode of described field effect transistor is connected an end of resistance R 3, and the other end of resistance R 3 is connected on the positive pole of diode D1, and the source electrode of described field effect transistor is connected on the internal circuit interface 2.
2. a kind of mobile phone with surge and static double protection function according to claim 1; it is characterized in that: also be connected with the surge delay circuit on the described anti-surge protection circuit; described surge delay circuit comprises resistance R 2 and electric capacity; one end of described resistance R 2 is connected on the positive pole of diode D1; the other end links to each other with electric capacity, and the other end ground connection of electric capacity.
3. a kind of mobile phone with surge and static double protection function according to claim 1, it is characterized in that: also be connected with current-limiting circuit on the described power interface 1, described current-limiting circuit comprises resistance R 1, and the two ends of described resistance R 1 are connected on the positive pole of power interface 1 and diode D1.
4. a kind of mobile phone with surge and static double protection function according to claim 1, it is characterized in that: described triode is the positive-negative-positive triode.
5. a kind of mobile phone with surge and static double protection function according to claim 4, it is characterized in that: described field effect transistor is P type field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101775690A CN103269062A (en) | 2013-05-15 | 2013-05-15 | Mobile phone with double functions of preventing surges and static electricity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101775690A CN103269062A (en) | 2013-05-15 | 2013-05-15 | Mobile phone with double functions of preventing surges and static electricity |
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| CN103269062A true CN103269062A (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101775690A Pending CN103269062A (en) | 2013-05-15 | 2013-05-15 | Mobile phone with double functions of preventing surges and static electricity |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1674389A (en) * | 2004-03-23 | 2005-09-28 | 华为技术有限公司 | Signal interface protective circuit |
| US20060158811A1 (en) * | 2005-01-18 | 2006-07-20 | Alcatel | Protection circuit |
| CN101119021A (en) * | 2006-05-10 | 2008-02-06 | 三星电子株式会社 | Overvoltage protection circuit and method thereof |
| CN101557103A (en) * | 2008-04-11 | 2009-10-14 | 上海韦尔半导体股份有限公司 | Transient voltage suppresser diode and manufacturing method thereof |
| US20110235228A1 (en) * | 2010-03-25 | 2011-09-29 | Analog Devices, Inc. | Apparatus and method for electronic circuit protection |
| CN202524058U (en) * | 2012-02-06 | 2012-11-07 | 苏州葵花光电科技有限公司 | Protection circuit against overvoltage, undervoltage and power reverse |
| CN203233161U (en) * | 2013-05-15 | 2013-10-09 | 成都市宏山科技有限公司 | Mobile phone with surge protection and electrostatic protection |
-
2013
- 2013-05-15 CN CN2013101775690A patent/CN103269062A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1674389A (en) * | 2004-03-23 | 2005-09-28 | 华为技术有限公司 | Signal interface protective circuit |
| US20060158811A1 (en) * | 2005-01-18 | 2006-07-20 | Alcatel | Protection circuit |
| CN101119021A (en) * | 2006-05-10 | 2008-02-06 | 三星电子株式会社 | Overvoltage protection circuit and method thereof |
| CN101557103A (en) * | 2008-04-11 | 2009-10-14 | 上海韦尔半导体股份有限公司 | Transient voltage suppresser diode and manufacturing method thereof |
| US20110235228A1 (en) * | 2010-03-25 | 2011-09-29 | Analog Devices, Inc. | Apparatus and method for electronic circuit protection |
| CN202524058U (en) * | 2012-02-06 | 2012-11-07 | 苏州葵花光电科技有限公司 | Protection circuit against overvoltage, undervoltage and power reverse |
| CN203233161U (en) * | 2013-05-15 | 2013-10-09 | 成都市宏山科技有限公司 | Mobile phone with surge protection and electrostatic protection |
Non-Patent Citations (1)
| Title |
|---|
| 戴钱坤等: "一种新型机载防浪涌电压保护电路设计", 《电子技术应用》 * |
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Application publication date: 20130828 |