CN101764399A - Cable television signal lightning arrester - Google Patents
Cable television signal lightning arrester Download PDFInfo
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- CN101764399A CN101764399A CN200910155389A CN200910155389A CN101764399A CN 101764399 A CN101764399 A CN 101764399A CN 200910155389 A CN200910155389 A CN 200910155389A CN 200910155389 A CN200910155389 A CN 200910155389A CN 101764399 A CN101764399 A CN 101764399A
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Abstract
The invention discloses a cable television signal lightning arrester which comprises a signal source line, a shielding layer line and a grounding line. The lightning arrester is sequentially provided with a gas-discharging tube circuit and a diode circuit from the input end to the output end, wherein the gas-discharging tube circuit comprises a gas-discharging tube which is connected between the signal source line and the shielding layer line and switched in the grounding line; the diode circuit comprises five diodes arranged between the signal source line and the shielding layer line; the first diode and the second diode are connected in series in an anode-to-anode mode between the signal source line and the shielding layer line; the third diode and the fourth diode are connected in series in a cathode-to-cathode mode between the signal source line and the shielding layer line; a bypass line is arranged between the anode ends of the first diode and the third diode and connected in series with a bidirectional diode; and the anode ends of the first diode and the third diode are respectively switched in the grounding line. The invention realizes secondary protection to a surge voltage by the gas-discharging tube circuit and the diode circuit and has higher reliability and simple circuit structure.
Description
Technical field
The present invention relates to a kind of cable TV lightning protection device.
Background technology
Surge voltage can produce harm greatly to electrical equipment, and is especially bigger for household electrical appliance harm, therefore surge protective device must be set.As application number is that 95237061.1 Chinese utility model patent discloses a kind of cable TV anti-lightening protector; comprise high frequency transformer; capacitance; piezo-resistance; the joint of stube cable; the socket that connects amplifier; between preceding end cable and the amplifier; the thunder and lightning that can isolate leading portion is arranged; but the TV signal that the leading portion cable can be come is the signal isolator of input amplifier successfully; there is one can isolate the thunder and lightning that the back segment cable comes between back segment cable and the amplifier; but the TV signal of amplifier output successfully can be dredged the signal isolator of back segment cable; thunder and lightning on the energy insulating power supply line is arranged between power line and the amplifier, but the alternating current that power line comes can be entered smoothly the power isolator of amplifier.This cable TV lightning protection device complex structure, reliability are also good inadequately, cause cost to improve, and use also inconvenient.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of simple in structure, and good reliability is with low cost, cable TV lightning protection device easy to use.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: cable television signal lightning arrester, draw together the signal source line, shielding layer line and ground wire, it is characterized in that: described lightning protection device is disposed with gas discharge tube circuit and diode circuit by input to output, described gas discharge tube circuit comprises the signal source line and shields the gas discharge tube that is connected between layer line, gas discharge tube inserts ground wire, described diode circuit comprises five diodes that are provided with between signal source line and shielding layer line, wherein first and second diode cathode are serially connected between signal source line and shielding layer line positive pole, third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line, and be provided with bypass line between first and the 3rd diode cathode end, bidirectional diode of serial connection on the described bypass line, and first and the 3rd diode cathode end insert ground wire respectively.
As preferably, described from first diode cathode end to the circuit of ground wire on forward a diode is set, described from the 3rd diode cathode end to the circuit of ground wire on negative sense a diode is set.
As preferably, described signal source line and shielding layer line also are in series with resistance between gas discharge tube circuit and diode circuit.
The present invention realizes the two-stage of surge voltage is protected by gas discharge tube circuit and diode circuit owing to adopted technique scheme, and reliability is higher, and circuit structure is also very simple.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is further described:
Fig. 1 is a structural representation of the present invention.
Embodiment
As shown in Figure 1, embodiment for cable TV lightning protection device of the present invention, draw together the signal source line, shielding layer line and ground wire, described lightning protection device is disposed with gas discharge tube circuit and diode circuit by input to output, described gas discharge tube circuit comprises the signal source line and shields the gas discharge tube that is connected between layer line, gas discharge tube inserts ground wire, described diode circuit comprises five diodes that are provided with between signal source line and shielding layer line, wherein first and second diode cathode are serially connected between signal source line and shielding layer line positive pole, third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line, and be provided with bypass line between first and the 3rd diode cathode end, bidirectional diode of serial connection on the described bypass line, and first and the 3rd diode cathode end insert ground wire respectively.Described from first diode cathode end to the circuit of ground wire on forward a diode is set, described from the 3rd diode cathode end to the circuit of ground wire on negative sense a diode is set.Described signal source line and shielding layer line also are in series with resistance between gas discharge tube circuit and diode circuit.Among Fig. 1, D1 is first diode, D2 is second diode, D3 is the 3rd diode, and D4 is the 4th diode, and D5 is that the 5th diode is bidirectional diode, D6 be from first diode cathode end to the circuit of ground wire on the diode that is provided with of forward, D7 be from the 3rd diode cathode end to the circuit of ground wire on the diode that is provided with of negative sense, G is the gas discharge tube between signal source line and shielding layer line, R1, R2 are respectively the resistance of connecting on signal source line and the shielding layer line.
In the network system of television set wire signal; when the front end string of television set wire signal has lightning protection anti-surge protector of the present invention; under normal circumstances; protector and the earth are in high-impedance state; when system the surge overvoltage occurs and reaches the discharge voltage of protector because of thunderbolt or other reasons; protector can be immediately in time nanosecond rapidly and the earth conducting; powerful surge current is introduced the earth; thereby protected television set; protector returns to the high-impedance state with the earth again after this surge voltage disappears, and does not influence the normal operation of system for TV set.
Claims (3)
1. cable television signal lightning arrester, draw together the signal source line, shielding layer line and ground wire, it is characterized in that: described lightning protection device is disposed with gas discharge tube circuit and diode circuit by input to output, described gas discharge tube circuit comprises the signal source line and shields the gas discharge tube that is connected between layer line, gas discharge tube inserts ground wire, described diode circuit comprises five diodes that are provided with between signal source line and shielding layer line, wherein first and second diode cathode are serially connected between signal source line and shielding layer line positive pole, third and fourth diode cathode anticathode is serially connected between described signal source line and shielding layer line line, and be provided with bypass line between first and the 3rd diode cathode end, bidirectional diode of serial connection on the described bypass line, and first and the 3rd diode cathode end insert ground wire respectively.
2. cable television signal lightning arrester according to claim 1, it is characterized in that: described from first diode cathode end to the circuit of ground wire on forward a diode is set, described from the 3rd diode cathode end to the circuit of ground wire on negative sense a diode is set.
3. cable television signal lightning arrester according to claim 2 is characterized in that: described signal source line and shielding layer line also are in series with resistance between gas discharge tube circuit and diode circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910155389A CN101764399A (en) | 2009-12-21 | 2009-12-21 | Cable television signal lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910155389A CN101764399A (en) | 2009-12-21 | 2009-12-21 | Cable television signal lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101764399A true CN101764399A (en) | 2010-06-30 |
Family
ID=42495431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910155389A Pending CN101764399A (en) | 2009-12-21 | 2009-12-21 | Cable television signal lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101764399A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
| CN115954844A (en) * | 2023-03-13 | 2023-04-11 | 成都凯天电子股份有限公司 | Lightning protection circuit suitable for aircraft electronic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599821Y (en) * | 2003-01-29 | 2004-01-14 | 烽火通信科技股份有限公司 | Multichannel signal port thunder-proof adapter |
| CN1581627A (en) * | 2003-07-31 | 2005-02-16 | 华为技术有限公司 | Protective circuit |
| CN2842835Y (en) * | 2005-11-01 | 2006-11-29 | 董春雷 | The two-way prevention siganl thunder-proof device |
| CN201018277Y (en) * | 2007-02-01 | 2008-02-06 | 株洲普天中普防雷科技有限公司 | Three-in-one lightning protection device dedicated for video monitoring system |
| CN201039374Y (en) * | 2007-03-29 | 2008-03-19 | 罗忆 | Video monitoring lighting prevention protector |
| CN201336567Y (en) * | 2008-07-16 | 2009-10-28 | 深圳日海通讯技术股份有限公司 | Protection circuit |
| CN201584775U (en) * | 2009-12-21 | 2010-09-15 | 浙江恒丰光电技术有限公司 | Cable TV signal lightning arrester |
-
2009
- 2009-12-21 CN CN200910155389A patent/CN101764399A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599821Y (en) * | 2003-01-29 | 2004-01-14 | 烽火通信科技股份有限公司 | Multichannel signal port thunder-proof adapter |
| CN1581627A (en) * | 2003-07-31 | 2005-02-16 | 华为技术有限公司 | Protective circuit |
| CN2842835Y (en) * | 2005-11-01 | 2006-11-29 | 董春雷 | The two-way prevention siganl thunder-proof device |
| CN201018277Y (en) * | 2007-02-01 | 2008-02-06 | 株洲普天中普防雷科技有限公司 | Three-in-one lightning protection device dedicated for video monitoring system |
| CN201039374Y (en) * | 2007-03-29 | 2008-03-19 | 罗忆 | Video monitoring lighting prevention protector |
| CN201336567Y (en) * | 2008-07-16 | 2009-10-28 | 深圳日海通讯技术股份有限公司 | Protection circuit |
| CN201584775U (en) * | 2009-12-21 | 2010-09-15 | 浙江恒丰光电技术有限公司 | Cable TV signal lightning arrester |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
| CN106210595B (en) * | 2012-11-22 | 2018-12-07 | 江苏华兴电子有限公司 | For ensuring the antenna isolator of high-frequency signal transmission quality |
| CN109510185A (en) * | 2018-12-07 | 2019-03-22 | 北京世纪瑞尔技术股份有限公司 | A kind of signal isolating device of anti-electric railway traction reflux interference |
| CN115954844A (en) * | 2023-03-13 | 2023-04-11 | 成都凯天电子股份有限公司 | Lightning protection circuit suitable for aircraft electronic equipment |
| CN115954844B (en) * | 2023-03-13 | 2023-06-13 | 成都凯天电子股份有限公司 | Lightning protection circuit suitable for aircraft electronic equipment |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100630 |