CN102684181A - Anti-static and lightning-prevention dual protection circuit - Google Patents
Anti-static and lightning-prevention dual protection circuit Download PDFInfo
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- CN102684181A CN102684181A CN2012101476158A CN201210147615A CN102684181A CN 102684181 A CN102684181 A CN 102684181A CN 2012101476158 A CN2012101476158 A CN 2012101476158A CN 201210147615 A CN201210147615 A CN 201210147615A CN 102684181 A CN102684181 A CN 102684181A
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Abstract
The invention discloses an anti-static and lightning-prevention dual protection circuit, which comprises differential signal interfaces at two ends, a first differential signal wire and a second differential signal wire, wherein the first differential signal wire and the second differential signal wire are used for connecting the differential signal interfaces, at least one gas discharge tube in mutual serial connection is arranged between the first differential signal wire and the second differential signal wire and is connected with the differential signal interfaces in parallel, the first differential signal wire and the second differential signal wire are both provided with resistors, and a transient voltage suppressor in parallel connection with the differential signal interfaces is arranged between the first differential signal wire and the second differential signal wire. The anti-static and lightning-prevention dual protection circuit disclosed by the invention can achieve the dual protection effect, the gas discharge tube is used as first-stage protection, the transient voltage suppressor is used as second-stage protection, so that a protection coefficient is increased, and the damages or destructions caused by static or lightning are avoided effectively.
Description
Technical field
The present invention relates to antistatic or lightning protection field, particularly relate to a kind of antistatic lightning protection dual-protection circuit.
Background technology
Along with science and technology development, the microelectric technique of increasingly extensive employing and electrified progressively realization have formed complex electromagnetic environments.So Electro Magnetic Compatibility (EMC-Electro Magnetic Compatibility) has important effect at electronic equipment; It is meant the coexisting state of electronic equipment each each self-operating of parts in common electromagnetic environment; Promptly require the various device in same electromagnetic environment to work normally and not disturb mutually, reach the electromagnetic compatibility state.
In influencing numerous factors of EMC performance; ESD (Electro-Static discharge; Static discharge) is a very common natural phenomena in the life; The surface possibly accumulate certain electric charge when the different material material was in contact with one another, and when running into other objects, possibly produce the static discharge voltage up to tens kilovolts; And thunder and lightning also needs emphasis to consider, thunder and lightning is sound, light, the concurrent a kind of physical phenomenon of electricity that occurs in the atmosphere, typically refers to the electric discharge phenomena of charged cloud layer to the earth.If electronic equipment is subjected to thunderbolt and ESD, can produce the overvoltage or the overcurrent of transient state in its inner circuit, light then influence the EMC performance of electronic equipment, the heavy then damage that can produce irrecoverable property to electronic equipment.
Summary of the invention
For solving the problems of the technologies described above, the present invention provide a kind of can antistatic again can lightning protection antistatic lightning protection dual-protection circuit.
A kind of antistatic lightning protection dual-protection circuit of the present invention; Comprise the differential signal interface at two ends and connect first differential signal line and second differential signal line of this differential signal interface; Establish at least one gas discharge tube of connecting each other between said first differential signal line and second differential signal line with the parallel connection of differential signal interface; First differential signal line and second differential signal line are equipped with resistance, establish the Transient Voltage Suppressor parallelly connected with the differential signal interface between said first differential signal line and second differential signal line.
A kind of antistatic lightning protection dual-protection circuit of the present invention, said gas discharge tube is one, and said gas discharge tube is established three pins, and one of them pin is used for ground connection.
A kind of antistatic lightning protection dual-protection circuit of the present invention, said gas discharge tube is two, the circuit between the said gas discharge tube is provided with grounding pin.
A kind of antistatic lightning protection dual-protection circuit of the present invention, said gas discharge tube is a ceramic gas discharge tube.
Beneficial effect compared with prior art of the present invention is: the present invention can reach the effect of duplicate protection; Gas discharge tube is protected as the first order, and Transient Voltage Suppressor is protected as the second level, makes the protection coefficient increase; Injury or the damage of effectively avoiding static or thunderbolt to bring; Simple in structure, with low cost, occupation mode is flexible, size that can compatible size encapsulation when shared pad locations and pad design has not only been saved the space of circuit board; Also meet the miniaturization of electronic product from now on, configurable development trend.
Description of drawings
Fig. 1 is the structural representation of a kind of antistatic lightning protection dual-protection circuit embodiment one among the present invention;
Fig. 2 is the structural representation of a kind of antistatic lightning protection dual-protection circuit embodiment two among the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Embodiment one:
Referring to Fig. 1; A kind of antistatic lightning protection dual-protection circuit; Establish at least one gas discharge tube of connecting each other 4 with 1 parallel connection of differential signal interface between first differential signal line 2 and second differential signal line, 3, the first differential signal lines 2 that comprise the differential signal interface 1 at two ends and connect this differential signal interface 1 and second differential signal line 3, gas discharge tube 4 is one; Gas discharge tube 4 is established three pins; One of them pin is used for ground connection, and first differential signal line 2 and second differential signal line 3 are equipped with and establish the Transient Voltage Suppressor 6 parallelly connected with differential signal interface 1 between resistance 5, the first differential signal lines 2 and second differential signal line 3.
At first be to let external energy earlier through the energy of gas discharge tube 4 discharges and the absorption overwhelming majority, remaining fraction energy absorbs through Transient Voltage Suppressor 6; Gas discharge tube 4 all is to be connected in parallel on the holding wire with Transient Voltage Suppressor 6; The power resistor 5 that dependence is connected between gas discharge tube 4 and the Transient Voltage Suppressor 6 is controlled; The series connection resistance is that several ohm power resistor 5 energy-conservation energy and the high voltages of making discharge through gas discharge tube 4 earlier, and the voltage after the discharge so just can guarantee Transient Voltage Suppressor 6 operate as normal generally all at several hectovolts; Voltage behind the Transient Voltage Suppressor 6 is generally all at tens volts; Thereby reach the effect of duplicate protection, gas discharge tube 4 should be protected as the first order, and Transient Voltage Suppressor 6 is protected as the second level.
Embodiment two:
Referring to Fig. 2; A kind of antistatic lightning protection dual-protection circuit; Comprise the differential signal interface at two ends and connect first differential signal line 2 and second differential signal line 3 of this differential signal interface 1; Establish at least one gas discharge tube of connecting each other 4 between first differential signal line 2 and second differential signal line 3 with 1 parallel connection of differential signal interface; First differential signal line 2 and second differential signal line 3 are equipped with and establish the Transient Voltage Suppressor 6 parallelly connected with differential signal interface 1 between resistance 5, the first differential signal lines 2 and second differential signal line 3.
Embodiment three: be that with the difference of other embodiment gas discharge tube 4 is ceramic gas discharge tube, can prolong the useful life of gas discharge tube.
So-called gas discharge tube 4 comprises diode and triode among the present invention, and voltage range is used for first or preceding two-stage of multi-stage protection circuit from 75V-3500V, is common on the market discharge tube.
So-called transient voltage TVS 6 among the present invention; Be a kind of high-effect protection device of diode, when transient voltage TVS 6 diodes receive moment during high energy impact events, it can be with the speed of 10 seconds-20 second-times; The high impedance of its two interpolar is become Low ESR; Absorb tall and big thousands of watts surge power, make the voltage case of two interpolars be positioned at a predetermined value, protect the precision components in the electronic circuit effectively; Avoid the damage of various surge pulses, because it has fast, advantages such as instantaneous power big, electric leakage is lower, the puncture voltage deviation is little, case position voltage is more easy to control, the nothing damage limit, volume of response time.
Comprehensively above-mentioned, the present invention can reach the effect of duplicate protection, and gas discharge tube 4 is protected as the first order; Transient Voltage Suppressor 6 makes the protection coefficient increase injury or the damage of effectively avoiding static or thunderbolt to bring as second level protection; Simple in structure, with low cost, occupation mode is flexible, size that can compatible size encapsulation when shared pad locations and pad design has not only been saved the space of circuit board; Also meet the miniaturization of electronic product from now on, configurable development trend.
From the above only is preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.
Claims (4)
1. antistatic lightning protection dual-protection circuit; It is characterized in that: comprise the differential signal interface at two ends and connect first differential signal line and second differential signal line of this differential signal interface; Establish at least one gas discharge tube of connecting each other between said first differential signal line and second differential signal line with the parallel connection of differential signal interface; First differential signal line and second differential signal line are equipped with resistance, establish the Transient Voltage Suppressor parallelly connected with the differential signal interface between said first differential signal line and second differential signal line.
2. a kind of antistatic lightning protection dual-protection circuit as claimed in claim 1, it is characterized in that: said gas discharge tube is one, and said gas discharge tube is established three pins, and one of them pin is used for ground connection.
3. a kind of antistatic lightning protection dual-protection circuit as claimed in claim 1, it is characterized in that: said gas discharge tube is two, and the circuit between the said gas discharge tube is provided with grounding pin.
4. a kind of antistatic lightning protection dual-protection circuit as claimed in claim 1, it is characterized in that: said gas discharge tube is a ceramic gas discharge tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101476158A CN102684181A (en) | 2012-05-14 | 2012-05-14 | Anti-static and lightning-prevention dual protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101476158A CN102684181A (en) | 2012-05-14 | 2012-05-14 | Anti-static and lightning-prevention dual protection circuit |
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| CN102684181A true CN102684181A (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101476158A Pending CN102684181A (en) | 2012-05-14 | 2012-05-14 | Anti-static and lightning-prevention dual protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108430153A (en) * | 2018-03-09 | 2018-08-21 | 京东方科技集团股份有限公司 | A kind of data transmission link plate, display module and electronic equipment |
| CN118300048A (en) * | 2024-03-22 | 2024-07-05 | 深圳市比创达电子科技有限公司 | Overcurrent protection static suppression system and method |
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| CN1581627A (en) * | 2003-07-31 | 2005-02-16 | 华为技术有限公司 | Protective circuit |
| CN2737046Y (en) * | 2004-09-17 | 2005-10-26 | 上海伊莱克斯实业有限公司 | Lightning and electric surge proof protector for communication signals |
| CN201038751Y (en) * | 2007-02-13 | 2008-03-19 | 范晓军 | Lightning protection module |
| CN201160222Y (en) * | 2008-02-21 | 2008-12-03 | 中兴通讯股份有限公司 | Second-generation extremely high speed digital subscriber line protection circuit |
| CN101741080A (en) * | 2009-12-21 | 2010-06-16 | 浙江恒丰光电技术有限公司 | Ethernet surge protector |
| CN201662890U (en) * | 2010-01-22 | 2010-12-01 | 孙翔 | Intelligent loop vehicle detector |
| CN201974448U (en) * | 2010-12-10 | 2011-09-14 | 广东雅达电子股份有限公司 | Surge-prevention intelligent electrical measuring instrument |
| CN201994655U (en) * | 2010-12-11 | 2011-09-28 | 株洲普天中普防雷科技有限公司 | Lightning protector for power supply network of Ethernet |
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- 2012-05-14 CN CN2012101476158A patent/CN102684181A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1472859A (en) * | 2002-07-30 | 2004-02-04 | 华为技术有限公司 | Lightening arresting method and device for Ethernet port |
| CN1581627A (en) * | 2003-07-31 | 2005-02-16 | 华为技术有限公司 | Protective circuit |
| CN2737046Y (en) * | 2004-09-17 | 2005-10-26 | 上海伊莱克斯实业有限公司 | Lightning and electric surge proof protector for communication signals |
| CN201038751Y (en) * | 2007-02-13 | 2008-03-19 | 范晓军 | Lightning protection module |
| CN201160222Y (en) * | 2008-02-21 | 2008-12-03 | 中兴通讯股份有限公司 | Second-generation extremely high speed digital subscriber line protection circuit |
| CN101741080A (en) * | 2009-12-21 | 2010-06-16 | 浙江恒丰光电技术有限公司 | Ethernet surge protector |
| CN201662890U (en) * | 2010-01-22 | 2010-12-01 | 孙翔 | Intelligent loop vehicle detector |
| CN201974448U (en) * | 2010-12-10 | 2011-09-14 | 广东雅达电子股份有限公司 | Surge-prevention intelligent electrical measuring instrument |
| CN201994655U (en) * | 2010-12-11 | 2011-09-28 | 株洲普天中普防雷科技有限公司 | Lightning protector for power supply network of Ethernet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108430153A (en) * | 2018-03-09 | 2018-08-21 | 京东方科技集团股份有限公司 | A kind of data transmission link plate, display module and electronic equipment |
| US11357100B2 (en) | 2018-03-09 | 2022-06-07 | Beijing Boe Optoelectronics Technology Co., Ltd. | Data transmission circuit board, mobile industry processor interface and device |
| CN118300048A (en) * | 2024-03-22 | 2024-07-05 | 深圳市比创达电子科技有限公司 | Overcurrent protection static suppression system and method |
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Application publication date: 20120919 |