CN103747305A - Anti-burnout circuit and set-top box - Google Patents
Anti-burnout circuit and set-top box Download PDFInfo
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- CN103747305A CN103747305A CN201310747062.4A CN201310747062A CN103747305A CN 103747305 A CN103747305 A CN 103747305A CN 201310747062 A CN201310747062 A CN 201310747062A CN 103747305 A CN103747305 A CN 103747305A
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Abstract
The invention provides an anti-burnout circuit and an anti-burnout set-top box, and relates to the technical field of electronic circuits. The circuit comprises a communication interface and a system signal ground, wherein the communication interface comprises a communication interface signal ground which is connected with the system signal ground through a magnetic bead. According to the circuit and the set-top box, a good anti-burnout effect can be achieved, and the problems of high electronic equipment burnout rate caused by an interface transmission line of conventional electronic equipment can be solved.
Description
Technical field
The present invention relates to electronic circuit technology field, relate in particular to a kind of anti-circuit and Set Top Box of burning.
Background technology
Existing electronic equipment, due to the needs of interconnects and communication, comprises increasing communication interface, as comprises following communication interface: network communication interface, serial ports, video interface and audio interface etc.When these interfaces and other equipment connections, the length of transmission line and the placement location of electronic equipment have relation, from several meters to tens meters not etc., and these transmission lines are owing to there is no unified standard and workmen's technological disparity, cause transmission line situation quite chaotic for length.Such as not accomplishing that forceful electric power light current separates, do not accomplish that house line is Fen Li with outside wire etc.This just causes some transmission line may exist higher than the transmission line several times of energy of hundred times even under normal circumstances, when these energy transmit in transmission line, may cause the device damage being connected with transmission line.
Take Set Top Box as example, traditional design, between the interface shielding ground of Set Top Box and signal ground, link together directly or indirectly, thereby cause from the energy of transmission line shielding transmission on the ground when arriving Set Top Box, may be through the signal ground of Set Top Box, thereby docking port device and electronic component bring fatal damage, even occur that Set Top Box burns.
Summary of the invention
The technical problem to be solved in the present invention, is to provide a kind of anti-circuit and Set Top Box of burning, and solves the problem that the interface transmission line of existing electronic equipment easily causes electronic equipment to burn.
The present invention is achieved in that
The anti-circuit burning, comprises communication interface and system signal ground, and described communication interface comprises communication interface signal ground, described communication interface signal ground by magnetic bead and system signal be connected.
Further, this anti-circuit burning also includes screw hole, the first resistance, the first electric capacity and the first electrical surge inhibitor, described screw hole connects one end, one end of the first resistance and the negative terminal of the first electrical surge inhibitor of the first electric capacity, and described system signal ground connects the other end, the other end of the first resistance and the anode of the first electrical surge inhibitor of the first electric capacity.
Further, the frequency of the RC network of the first described resistance and the first electric capacity composition is 40Hz～60Hz.
Further, described the first resistance is more than megaohm, and described the first electric capacity is high-voltage capacitance, and the withstand voltage of described the first electrical surge inhibitor is more than 240V.
Further, this anti-circuit burning also comprises casing ground, the second resistance and the second electric capacity, and described casing ground connects one end of the second resistance and one end of the second electric capacity, and system signal ground connects the other end of the second resistance and the other end of the second electric capacity.
Further, this anti-circuit burning also comprises the second electrical surge inhibitor, and described casing ground is connected with the negative terminal of the second electrical surge inhibitor, and described communication interface signal ground is connected with the anode of the second electrical surge inhibitor.
Further, the frequency of the RC network of the second described resistance and the second electric capacity composition is 40Hz～60Hz.
Further, described the second resistance is more than megaohm, and described the second electric capacity is high-voltage capacitance, and the withstand voltage of described the second electrical surge inhibitor is more than 240V.
This anti-circuit burning also includes screw hole, casing ground, a resistance and an electric capacity, and screw hole is connected with casing ground, one end of resistance, one end of electric capacity, is connected with the other end of resistance, the other end of electric capacity casing.
Further, the frequency of the RC network of described resistance and electric capacity composition is 40Hz～60Hz.
Further, described resistance is more than megaohm, and described electric capacity is high-voltage capacitance.
Further, described communication interface is the communication interface without shielding.
And the present invention also provides a kind of anti-Set Top Box of burning, described Set Top Box comprises above-mentioned arbitrary described anti-circuit that burns.
Tool of the present invention has the following advantages:
1, by system signal independently open with casing ground, the loop of the Energy Transfer of outside no longer passes through signal ground, avoids like this damage of the device of transmission line energy to system;
2, the present invention realizes simply, and cost is low, and that well below Set Top Box device failure, brings reprocesses the cost of even scrapping, and has improved income and the stability of product;
3, the present invention, when increasing protective capacities, can not bring impact to the signal transmission of communication interface.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the preferred embodiment of the present invention.
Embodiment
By describing technology contents of the present invention, structural feature in detail, being realized object and effect, below in conjunction with execution mode and coordinate accompanying drawing to be explained in detail.
As shown in Figure 1, be the circuit diagram of a kind of anti-circuit burning provided by the invention, comprise communication interface and system signal ground, communication interface comprises communication interface signal ground, communication interface signal ground by magnetic bead and system signal be connected.Communication interface can be divided into Interface for digital communication (as serial ports, network interface etc.) and analog communication interface (as video port, audio port etc.), and corresponding system signal ground also includes digital signal and analog signal ground.In Fig. 1 take the audio interface CN1 of analog communication interface as example, the ground of audio interface CN1 (being communication interface signal ground) by magnetic bead L1 and being connected in analog in system signal ground, the holding wire of audio interface CN1 is connected with audio signal.If communication interface is Interface for digital communication, should be connected in system signal ground digitally by magnetic bead.By the buffer action of magnetic bead, communication interface signal ground and system signal ground is not directly connected, be connected to energy on the transmission line of communication interface can be not quickly to system signal produce impact, avoided the damage of energy to circuit on transmission line.
Further, this circuit also includes screw hole H1, the first resistance R 1, the first capacitor C 1 and the first electrical surge inhibitor D1, screw hole H1 connects one end, one end of the first resistance R 1 and the negative terminal of the first electrical surge inhibitor D1 of the first capacitor C 1, and system signal ground connects the other end, the other end of the first resistance R 1 and the anode of the first electrical surge inhibitor D1 of the first capacitor C 1.By such processing, screw hole circuit is not directly connected with system signal is low, and the energy on screw hole can not be directly delivered to system signal on the ground, has further avoided the damage of external energy to circuit.
In order to realize electromagnetic shielding, common electronic circuit can comprise casing ground, in this case, this circuit also comprises casing (be signal shielding ground), the second resistance R 2 and the second capacitor C 2, casing ground connects one end of the second resistance R 2 and one end of the second capacitor C 2, and system signal ground connects the other end of the second resistance R 2 and the other end of the second capacitor C 2.Casing ground is independently opened completely with system signal ground, and the second resistance R 2 and the second capacitor C 2 have been avoided the impact of the energy on casing to circuit.
Preferably, this circuit also comprises the second electrical surge inhibitor D2, is connected with the negative terminal of the second electrical surge inhibitor D2 casing, and communication interface signal ground is connected with the anode of the second electrical surge inhibitor D2.Screw hole in above-mentioned also can directly be connected with casing ground, and while directly connecting, the first resistance R 1, the first capacitor C 1 and the second resistance R 2 and second capacitor C 2 these four elements can only adopt a resistance and an electric capacity.In order to play better isolation and protection effect; the first resistance R 1 resistance is more than megaohm; the first capacitor C 1 is high-voltage capacitance; the withstand voltage of the first electrical surge inhibitor D1 is more than 240V; the second resistance R 2 resistances are more than megaohm; the second capacitor C 2 is high-voltage capacitance, and the withstand voltage of the second electrical surge inhibitor D2 is more than 240V.The first above resistance R 1 and the first capacitor C 1 and the second resistance R 2 and the second capacitor C 2 form RC network simultaneously, and frequency is at power frequency scope, i.e. 40Hz-60Hz.
For fear of the impact of transmission line energy, communication interface is preferably the communication interface without shielding, or when adopting the shielded communication interface of tool, unsettled shielding pin.
On the basis of foregoing circuit, the present invention also provides a kind of anti-Set Top Box of burning, and described Set Top Box comprises above-mentioned arbitrary described anti-circuit that burns.
To sum up, circuit provided by the invention and Set Top Box realize simple, can reach good anti-effect of burning.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (18)
1. the anti-circuit burning, is characterized in that: comprise communication interface and system signal ground, described communication interface comprises communication interface signal ground, described communication interface signal ground by magnetic bead and system signal be connected.
2. a kind of anti-circuit burning according to claim 1, it is characterized in that: also include screw hole, the first resistance, the first electric capacity and the first electrical surge inhibitor, described screw hole connects one end, one end of the first resistance and the negative terminal of the first electrical surge inhibitor of the first electric capacity, and described system signal ground connects the other end, the other end of the first resistance and the anode of the first electrical surge inhibitor of the first electric capacity.
3. a kind of anti-circuit burning according to claim 2, is characterized in that: the frequency of the RC network of the first described resistance and the first electric capacity composition is 40Hz～60Hz.
4. a kind of anti-circuit burning according to claim 2, is characterized in that: described the first resistance is more than megaohm, and described the first electric capacity is high-voltage capacitance, and the withstand voltage of described the first electrical surge inhibitor is more than 240V.
5. a kind of anti-circuit burning according to claim 1, it is characterized in that: also comprise casing ground, the second resistance and the second electric capacity, described casing ground connects one end of the second resistance and one end of the second electric capacity, and system signal ground connects the other end of the second resistance and the other end of the second electric capacity.
6. a kind of anti-circuit burning according to claim 2, it is characterized in that: also comprise casing ground, the second resistance and the second electric capacity, described casing ground connects one end of the second resistance and one end of the second electric capacity, and system signal ground connects the other end of the second resistance and the other end of the second electric capacity.
7. a kind of anti-circuit burning according to claim 5, it is characterized in that: also comprise the second electrical surge inhibitor, described casing ground is connected with the negative terminal of the second electrical surge inhibitor, and described communication interface signal ground is connected with the anode of the second electrical surge inhibitor.
8. a kind of anti-circuit burning according to claim 6, it is characterized in that: also comprise the second electrical surge inhibitor, described casing ground is connected with the negative terminal of the second electrical surge inhibitor, and described communication interface signal ground is connected with the anode of the second electrical surge inhibitor.
9. a kind of anti-circuit burning one of according to claim 5, is characterized in that: the frequency of the RC network of the second described resistance and the second electric capacity composition is 40Hz～60Hz.
10. a kind of anti-circuit burning one of according to claim 6, is characterized in that: the frequency of the RC network of the second described resistance and the second electric capacity composition is 40Hz～60Hz.
11. described a kind of anti-circuit that burn one of according to claim 7, is characterized in that: described the second resistance is more than megaohm, described the second electric capacity is high-voltage capacitance, and the withstand voltage of described the second electrical surge inhibitor is more than 240V.
12. described a kind of anti-circuit that burn one of according to claim 8, is characterized in that: described the second resistance is more than megaohm, described the second electric capacity is high-voltage capacitance, and the withstand voltage of described the second electrical surge inhibitor is more than 240V.
13. a kind of anti-circuit that burn according to claim 1, it is characterized in that: also include screw hole, casing ground, a resistance and an electric capacity, screw hole is connected with casing ground, one end of resistance, one end of electric capacity, is connected with the other end of resistance, the other end of electric capacity casing.
14. according to a kind of anti-circuit burning one of described in claim 13, it is characterized in that: the frequency of the RC network of described resistance and electric capacity composition is 40Hz～60Hz.
15. according to a kind of anti-circuit burning one of described in claim 13, it is characterized in that: described resistance is more than megaohm, and described electric capacity is high-voltage capacitance.
16. according to arbitrary described a kind of anti-circuit burning in claim 1-15, it is characterized in that: described communication interface is the communication interface without shielding.
17. 1 kinds of anti-Set Top Box of burning, described Set Top Box comprises arbitrary described anti-circuit that burns in the claims 1-15.
18. 1 kinds of anti-Set Top Box of burning, described Set Top Box comprises arbitrary described anti-circuit that burns in the claims 16.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747062.4A CN103747305B (en) | 2013-12-30 | 2013-12-30 | A kind of anti-burnout circuit and set-top box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310747062.4A CN103747305B (en) | 2013-12-30 | 2013-12-30 | A kind of anti-burnout circuit and set-top box |
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| CN103747305A true CN103747305A (en) | 2014-04-23 |
| CN103747305B CN103747305B (en) | 2017-06-23 |
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| CN201310747062.4A Active CN103747305B (en) | 2013-12-30 | 2013-12-30 | A kind of anti-burnout circuit and set-top box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107529022A (en) * | 2016-06-21 | 2017-12-29 | 中兴通讯股份有限公司 | AV interface circuits and its manufacture method |
| CN111586936A (en) * | 2020-05-28 | 2020-08-25 | 歌尔科技有限公司 | Multi-path constant current driving circuit and multi-path constant current driving device |
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| CN101540683A (en) * | 2008-03-17 | 2009-09-23 | 华为技术有限公司 | Interface circuit and communication equipment |
| CN102096651A (en) * | 2010-12-22 | 2011-06-15 | 深圳市中兴移动通信有限公司 | Mobile phone interface multiplexing circuit based on standard micro USB interface |
| CN102595772A (en) * | 2012-01-19 | 2012-07-18 | 福建星网视易信息系统有限公司 | Method for preventing interface burning-out of equipment with external equipment interface |
| CN202475455U (en) * | 2012-03-02 | 2012-10-03 | 成都飞鱼星科技开发有限公司 | Ethernet interface protection circuit |
| CN202713356U (en) * | 2012-05-21 | 2013-01-30 | 杭州华三通信技术有限公司 | Interface circuit realizing over-voltage and over-current protection and electronic device |
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2013
- 2013-12-30 CN CN201310747062.4A patent/CN103747305B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540683A (en) * | 2008-03-17 | 2009-09-23 | 华为技术有限公司 | Interface circuit and communication equipment |
| CN102096651A (en) * | 2010-12-22 | 2011-06-15 | 深圳市中兴移动通信有限公司 | Mobile phone interface multiplexing circuit based on standard micro USB interface |
| CN102595772A (en) * | 2012-01-19 | 2012-07-18 | 福建星网视易信息系统有限公司 | Method for preventing interface burning-out of equipment with external equipment interface |
| CN202475455U (en) * | 2012-03-02 | 2012-10-03 | 成都飞鱼星科技开发有限公司 | Ethernet interface protection circuit |
| CN202713356U (en) * | 2012-05-21 | 2013-01-30 | 杭州华三通信技术有限公司 | Interface circuit realizing over-voltage and over-current protection and electronic device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107529022A (en) * | 2016-06-21 | 2017-12-29 | 中兴通讯股份有限公司 | AV interface circuits and its manufacture method |
| CN107529022B (en) * | 2016-06-21 | 2021-12-07 | 中兴通讯股份有限公司 | AV interface circuit and method for manufacturing the same |
| CN111586936A (en) * | 2020-05-28 | 2020-08-25 | 歌尔科技有限公司 | Multi-path constant current driving circuit and multi-path constant current driving device |
| CN111586936B (en) * | 2020-05-28 | 2023-04-07 | 歌尔科技有限公司 | Multi-path constant current driving circuit and multi-path constant current driving device |
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| CN103747305B (en) | 2017-06-23 |
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