CN103475205B - Protective circuit - Google Patents
Protective circuit Download PDFInfo
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- CN103475205B CN103475205B CN201310415011.1A CN201310415011A CN103475205B CN 103475205 B CN103475205 B CN 103475205B CN 201310415011 A CN201310415011 A CN 201310415011A CN 103475205 B CN103475205 B CN 103475205B
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- Prior art keywords
- triode
- diode
- collector electrode
- resistance
- base stage
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Abstract
The invention discloses a kind of protective circuit; comprise triode, resistance, electric capacity and diode; the base stage of the first triode is as voltage input end; the present invention first triode and the second triode composition voltage follower, transmit distortionless for input signal, the first diode and the second diode are as overload protection; during the device effectively preventing outside number of connection too much; electric current is increased, and damages device, effectively extend the useful life of circuit.
Description
Technical field
The present invention relates to a kind of protective circuit, particularly a kind of power protecting circuit.
Background technology
Low voltage component can discharge rapidly to electrostatic signal, but has very large leakage current, when integrated circuit component quantity gets more and more, very large leakage current can be produced, by the normal work of the whole circuit of impact, even cause the damage of circuit devcie, affect the useful life of circuit.
Therefore need a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
Goal of the invention: for above-mentioned prior art Problems existing and deficiency, the object of this invention is to provide a kind of protective circuit, effectively extends the useful life of circuit.
Technical scheme: the technical solution adopted in the present invention is a kind of protective circuit, comprise triode, resistance, electric capacity and diode, the base stage of the first triode is as voltage input end, its emitter is connected with the base stage of the second triode by the first electric capacity, the collector electrode of this first triode is connected with the collector electrode of the second triode, and be connected with the base stage of the 5th triode, the emitter of the 5th triode is connected with the collector electrode of the 6th triode, its collector electrode is connected with the base stage of the 6th triode, the emitter of the 6th triode and the equal ground connection of emitter of the second triode, collector electrode and the 4th resistance of the 6th triode form voltage output end, the emitter of the 3rd triode is connected with the collector electrode of the first triode, its base stage is connected with the collector electrode of the second triode by the second resistance, and be connected with its collector electrode by the first resistance, the collector electrode of the 3rd triode is connected with the base stage of the 4th triode, and the collector electrode of the 4th triode accesses positive voltage by variable resistor, the positive pole of the first diode is connected with the base stage of the 3rd triode, and its negative pole is connected with voltage output end.
Preferably, the emitter of the 4th triode is connected with voltage output end by the 3rd resistance.
Preferably, the negative pole of the second diode is connected with the base stage of the 3rd triode, and its positive pole is connected with voltage output end.
Preferably, the first diode and the second diode adopt voltage stabilizing didoe.
Preferably, the 5th triode is PNP type triode.
Beneficial effect: the present invention compared with prior art; its advantage is the present invention first triode and the second triode composition voltage follower; transmit distortionless for input signal; first diode and the second diode are as overload protection; during the device effectively preventing outside number of connection too much; electric current is increased, and damages device, effectively extend the useful life of circuit.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention includes triode, resistance, electric capacity and diode, the base stage of the first triode Q1 is as voltage input end, its emitter is connected with the base stage of the second triode Q2 by the first electric capacity C1, the collector electrode of this first triode Q1 is connected with the collector electrode of the second triode Q2, and be connected with the base stage of the 5th triode Q5, the emitter of the 5th triode Q5 is connected with the collector electrode of the 6th triode Q6, its collector electrode is connected with the base stage of the 6th triode Q6, the emitter of the 6th triode Q6 and the equal ground connection of emitter of the second triode Q2; Collector electrode and the 4th resistance R4 of the 6th triode Q6 form voltage output end; The emitter of the 3rd triode Q3 is connected with the collector electrode of the first triode Q1, its base stage is connected with the collector electrode of the second triode Q2 by the second resistance R2, and be connected with its collector electrode by the first resistance R1, the collector electrode of the 3rd triode Q3 is connected with the base stage of the 4th triode Q4, and the collector electrode of the 4th triode Q4 accesses positive voltage by variable resistor R5; The positive pole of the first diode D1 is connected with the base stage of the 3rd triode Q3, and its negative pole is connected with voltage output end.
The emitter of the 4th triode Q4 is connected with voltage output end by the 3rd resistance R3, the negative pole of the second diode D2 is connected with the base stage of the 3rd triode Q3, its positive pole is connected with voltage output end, first diode D1 and the second diode D2 adopts voltage stabilizing didoe, and the 5th triode Q5 can adopt PNP type triode.
The present invention first triode Q1 and the second triode Q2 forms voltage follower; transmit distortionless for input signal; first diode D1 and the second diode D2 is as overload protection; during the device effectively preventing outside number of connection too much; electric current is increased; and damage device, effectively extend the useful life of circuit.
Claims (5)
1. protective circuit, it is characterized in that: comprise triode, resistance, electric capacity and diode, described triode comprises the first triode (Q1), the second triode (Q2), the 3rd triode (Q3), the 4th triode (Q4), the 5th triode (Q5) and the 6th triode (Q6), and described resistance comprises the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4) and variable resistor (R5), described electric capacity comprises the first electric capacity (C1), described diode comprises the first diode (D1) and the second diode (D2), the base stage of described first triode (Q1) is as voltage input end, its emitter is connected with the base stage of the second triode (Q2) by the first electric capacity (C1), the collector electrode of this first triode (Q1) is connected with the collector electrode of the second triode (Q2), and be connected with the base stage of the 5th triode (Q5), the emitter of described 5th triode (Q5) is connected with the collector electrode of the 6th triode (Q6), the collector electrode of the 5th triode (Q5) is connected with the base stage of the 6th triode (Q6), the described emitter of the 6th triode (Q6) and the equal ground connection of emitter of the second triode (Q2), collector electrode and the 4th resistance (R4) of described 6th triode (Q6) form voltage output end, the emitter of the 3rd triode (Q3) is connected with the collector electrode of the first triode (Q1), the base stage of the 3rd triode (Q3) is connected with the collector electrode of the second triode (Q2) by the second resistance (R2), and be connected with its collector electrode by the first resistance (R1), the collector electrode of described 3rd triode (Q3) is connected with the base stage of the 4th triode (Q4), and the collector electrode of described 4th triode (Q4) accesses positive voltage by variable resistor (R5), the positive pole of described first diode (D1) is connected with the base stage of the 3rd triode (Q3), and its negative pole is connected with voltage output end.
2. protective circuit according to claim 1, is characterized in that: the emitter of described 4th triode (Q4) is connected with voltage output end by the 3rd resistance (R3).
3. protective circuit according to claim 1, is characterized in that: the negative pole of described second diode (D2) is connected with the base stage of the 3rd triode (Q3), and its positive pole is connected with voltage output end.
4. the protective circuit according to claim 1 or 3, is characterized in that: described first diode (D1) and the second diode (D2) adopt voltage stabilizing didoe.
5. protective circuit according to claim 1, is characterized in that: described 5th triode (Q5) is PNP type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310415011.1A CN103475205B (en) | 2013-09-13 | 2013-09-13 | Protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310415011.1A CN103475205B (en) | 2013-09-13 | 2013-09-13 | Protective circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103475205A CN103475205A (en) | 2013-12-25 |
| CN103475205B true CN103475205B (en) | 2016-01-20 |
Family
ID=49799943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310415011.1A Expired - Fee Related CN103475205B (en) | 2013-09-13 | 2013-09-13 | Protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103475205B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108182462A (en) * | 2018-01-03 | 2018-06-19 | 广州爱易学智能信息科技有限公司 | The books management system in library |
| CN108133549A (en) * | 2018-01-03 | 2018-06-08 | 广州爱易学智能信息科技有限公司 | Library's self-care system |
| CN108182461A (en) * | 2018-01-03 | 2018-06-19 | 广州爱易学智能信息科技有限公司 | Intelligent management system for library |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094365A (en) * | 1999-10-20 | 2000-07-25 | Chiao; Po-Lun | Power supply device of switching mode with leakage current protection circuit |
| CN2692914Y (en) * | 2004-02-17 | 2005-04-13 | 张斌 | AC non-current eakage power supply |
| DE202009007682U1 (en) * | 2008-06-06 | 2009-08-27 | Abb Oy | Arrangement for an EMC filter of a frequency converter |
| CN102035163A (en) * | 2010-12-10 | 2011-04-27 | 上海诺雅克电气有限公司 | Power supply device for residual current protector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2010100934A1 (en) * | 2009-03-05 | 2012-09-06 | 三菱電機株式会社 | Leakage current reduction device |
-
2013
- 2013-09-13 CN CN201310415011.1A patent/CN103475205B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094365A (en) * | 1999-10-20 | 2000-07-25 | Chiao; Po-Lun | Power supply device of switching mode with leakage current protection circuit |
| CN2692914Y (en) * | 2004-02-17 | 2005-04-13 | 张斌 | AC non-current eakage power supply |
| DE202009007682U1 (en) * | 2008-06-06 | 2009-08-27 | Abb Oy | Arrangement for an EMC filter of a frequency converter |
| CN102035163A (en) * | 2010-12-10 | 2011-04-27 | 上海诺雅克电气有限公司 | Power supply device for residual current protector |
Non-Patent Citations (1)
| Title |
|---|
| Electrical characteristics of the novel BiCMOS ESD protection circuit with low trigger voltage, low leakage and fast turn-on;Byung-Seok Lee et al.;《TENCON 2011 - 2011 IEEE Region 10 Conference》;20111124;第667-670页 * |
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| Publication number | Publication date |
|---|---|
| CN103475205A (en) | 2013-12-25 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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Effective date of registration: 20160810 Address after: 2 Building 3, 215300 Feng Lu, Zhenjiang, Suzhou, Jiangsu Patentee after: Kunshan Longshida Electronic Material Co.,Ltd. Address before: Suzhou City, Jiangsu Province, Kunshan City Zhang Pu Feng Zhenjiang Road No. 3 room 2 Patentee before: Kunshan Xinjinfu Precision Electronics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160913 |