CN204992561U - Cable television signal surge protector - Google Patents
Cable television signal surge protector Download PDFInfo
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- CN204992561U CN204992561U CN201520589220.2U CN201520589220U CN204992561U CN 204992561 U CN204992561 U CN 204992561U CN 201520589220 U CN201520589220 U CN 201520589220U CN 204992561 U CN204992561 U CN 204992561U
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Abstract
The utility model relates to a cable television signal surge protector, include: after being connected, power supply circuit protected location and signal source protected location, power supply circuit protected location be connected the common port with the signal source protected location. The utility model provides a lightning protection device includes power supply circuit protected location and signal source protected location, and the thunder and lightning goes on the ground earial drainage through common port and external cable, plays the effect of protection TV. The utility model provides a lightning protection device is multiple functional, safe and reliable and with low costs.
Description
Technical field
The utility model relates to circuit protection Lightning Prevention Technique field, particularly relates to a kind of cable TV signal Surge Protector.
Background technology
Surge voltage can produce harm greatly to electrical equipment, especially larger for household electrical appliance harm, therefore must arrange surge protective device.
The Chinese utility model patent being 95237061.1 as application number discloses a kind of cable TV signal anti-lightening protector, comprise high frequency transformer, capacitance, piezo-resistance, the joint of stube cable, connect the socket of amplifier, between front end cable and amplifier, there is a thunder and lightning isolating leading portion, but the signal isolator of the TV signal successfully input amplifier that leading portion cable can be come, the thunder and lightning that one can be isolated back segment cable and come is had between back segment cable and amplifier, but the TV signal that amplifier exports successfully can be dredged the signal isolator of back segment cable, the thunder and lightning on an energy insulating power supply line is had between power line and amplifier, but the alternating current that power line comes can be entered smoothly the power isolator of amplifier.This cable television signal lightning arrester complex structure, reliability is also good not, causes cost to improve, and uses also inconvenient.
Application number be 200910155389.6 Chinese utility model patent application discloses that cable television signal lightning arrester, comprise signal source line, shielding layer line and ground wire, lightning protection device is disposed with gas discharge tube circuit and diode circuit by input to output, gas discharge tube circuit comprises the gas discharge tube be connected between signal source line with shielding layer line, gas discharge tube access ground wire, diode circuit comprises five diodes arranged 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 to positive pole, third and fourth diode cathode anticathode is serially connected between signal source line and shielding layer line line, and be provided with bypass line between first and the 3rd diode cathode end, bypass line is connected in series a bidirectional diode, and first is accessed ground wire respectively with the 3rd diode cathode end.Realize the two class protection to surge voltage by gas discharge tube circuit and diode circuit, reliability is higher, and circuit structure is also very simple.
Visible, existing lightning protection device is in the art all only for guard signal source, but not to power supply.
Utility model content
One of them object of the present utility model is to provide a kind of cable TV signal Surge Protector, can only guard signal source and can not the technical problem of protection power source to solve in prior art.
For this purpose, the utility model proposes a kind of cable TV signal Surge Protector, comprising: power circuit protected location and signal source protected location, described power circuit protected location is connected common port after being connected with described signal source protected location.
Alternatively, described power circuit protected location comprises: the first gas discharge tube and the first piezo-resistance ~ the second piezo-resistance, wherein,
The first end of the first piezo-resistance is connected with the first power line, and the second end is connected with the first end of the first gas discharge tube; Second end of the second piezo-resistance is connected with second source line;
Second end of the first gas discharge tube is connected with the first end of the second piezo-resistance, and the three-terminal link of the first gas discharge tube is to common port.
Alternatively, described power circuit protected location also comprises: the 3rd piezo-resistance ~ the 6th piezo-resistance, wherein,
The first end of the 3rd piezo-resistance is connected with the first end of the first piezo-resistance, and the first end that the second end connects the 4th piezo-resistance connects, and the second end of the 4th piezo-resistance is connected with the second end of the second piezo-resistance;
The first end of the 5th piezo-resistance is connected with the first end of the 3rd piezo-resistance, and the first end that the second end connects the 6th piezo-resistance connects, and the second end of the 6th piezo-resistance is connected with the second end of the 4th piezo-resistance;
The tie point of the first end of the tie point of the second end of the 3rd piezo-resistance and the first end of the 4th piezo-resistance, the second end of the 5th piezo-resistance and the 6th piezo-resistance respectively with the three-terminal link of the first gas discharge tube.
Alternatively, described power circuit protected location also comprises: the first inductance and the second inductance, wherein,
The first end of the first inductance is connected with the first end of the first piezo-resistance, and the second end is connected with the first end of the 3rd piezo-resistance;
The first end of the second inductance is connected with the second end of the second piezo-resistance, and the second end is connected with the second end of the 4th piezo-resistance.
Alternatively, signal source protected location comprises: the first resistance ~ the second resistance, the first diode ~ the second diode, the second gas discharge tube and Zener diode; Wherein, the first end of Zener diode connects shielding conductor, the second end connection signal line;
The anode of the first diode is connected with the first end of Zener diode, and negative electrode is connected with the negative electrode of the second diode, and the anode of the second diode is connected with the second end of Zener diode;
The first end of the first resistance is connected with the anode of the first diode, and the second end is connected with the first end of the second gas discharge tube;
The first end of the second resistance is connected with the anode of the second diode, and the second end is connected with the second end of the second gas discharge tube;
3rd end of the second gas discharge tube is connected to tie point and the common port of the negative electrode of the first diode and the negative electrode of the second diode respectively.
With can only guard signal source and can not compared with the lightning protection device of protection power source in prior art; the lightning protection device that the utility model provides comprises power circuit protected location and signal source protected location; thunder and lightning carries out earial drainage over the ground by common port and external cable, plays the effect of protection TV.The lightning protection device that the utility model provides is multiple functional, safe and reliable and cost is low.
Accompanying drawing explanation
Can understanding feature and advantage of the present utility model clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the utility model, in the accompanying drawings:
Fig. 1 is the cable TV signal Surge Protector circuit diagram that the utility model embodiment provides.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1; the utility model embodiment provides a kind of cable TV signal Surge Protector; comprise: power circuit protected location 100 and signal source protected location 200, power circuit protected location 100 is connected public terminal GND after being connected with signal source protected location 200.
Wherein, power circuit protected location 100 comprises: the first gas discharge tube G1 and the first piezo-resistance RV1 ~ the second piezo-resistance RV2, wherein,
The first end of the first piezo-resistance RV1 is connected with the first power line 103, and the second end is connected with the first end of the first gas discharge tube G1; Second end of the second piezo-resistance RV2 is connected with second source line 104;
Second end of the first gas discharge tube G1 is connected with the first end of the second piezo-resistance RV2, and the three-terminal link of the first gas discharge tube G1 is to public terminal GND.
Will be understood that, in the embodiment of the present invention, public terminal GND refers to the terminals of drawing from the earth.
Under normal operation, the first piezo-resistance RV1 ~ the second piezo-resistance RV2 is high-impedance state, and power circuit normally works, and namely electric current injects from the input 101 of power circuit protected location 100, flows out from output 102.When the first power line 103 and/or second source line 104 receive surge voltage, if during the pressure sensitive voltage of this surge voltage more than the first piezo-resistance RV1 and the second piezo-resistance RV2, the resistance value of the first piezo-resistance RV1 and/or the second piezo-resistance RV2 reduces rapidly.Now, surge voltage by the first piezo-resistance RV1 and/or the second piezo-resistance RV2, the first gas discharge tube G1, earial drainage over the ground after public terminal GND, thus plays the object of protection power source circuit.
Alternatively, as shown in Figure 1, power circuit protected location 100 also comprises: the 3rd piezo-resistance RV3 ~ the 6th piezo-resistance RV3, wherein,
The first end of the 3rd piezo-resistance RV3 is connected with the first end of the first piezo-resistance RV1, and the first end that the second end connects the 4th piezo-resistance RV4 connects, and second end of the 4th piezo-resistance RV4 is connected with second end of the second piezo-resistance RV2;
The first end of the 5th piezo-resistance RV5 is connected with the first end of the 3rd piezo-resistance RV3, and the first end that the second end connects the 6th piezo-resistance RV6 connects, and second end of the 6th piezo-resistance RV6 is connected with second end of the 4th piezo-resistance RV4;
The tie point e of the first end of the tie point d of second end of the 3rd piezo-resistance RV3 and the first end of the 4th piezo-resistance RV4, second end of the 5th piezo-resistance RV5 and the 6th piezo-resistance RV6 respectively with the three-terminal link of the first gas discharge tube G1.
Under normal operation, the 3rd piezo-resistance RV3 ~ the 6th piezo-resistance RV6 is high-impedance state, and power circuit normally works.When the first power line 103 and/or second source line 104 receive surge voltage; if during the pressure sensitive voltage of this surge voltage more than the 3rd piezo-resistance RV3 to the 6th piezo-resistance RV6; now; this surge voltage passes through the 3rd piezo-resistance RV3 to the 6th piezo-resistance RV6, tie point a, tie point c, public terminal GND earial drainage over the ground, thus plays the object of protection power source circuit.Simultaneously; if this surge voltage duration is time longer; this surge voltage by earial drainage over the ground after the first piezo-resistance RV1 and/or the second piezo-resistance RV2, the first gas discharge tube G1, tie point a, tie point c and public terminal GND, thus plays the object of protection power source circuit.Carry out earial drainage by two branch roads, thus accelerate the speed of earial drainage.
Alternatively, as shown in Figure 1, power circuit protected location 100 also comprises: the first inductance L 1 and the second inductance L 2.Wherein, the first end of the first inductance L 1 is connected with the first end of the first piezo-resistance RV1, and the second end is connected with the first end of the 3rd piezo-resistance RV3; The first end of the second inductance L 2 is connected with second end of the second piezo-resistance RV2, and the second end is connected with second end of the 4th piezo-resistance RV4.
In the utility model embodiment, the first inductance L 1 and the second inductance L 2 are arranged between above-mentioned two branch roads affects its work for preventing surge voltage from conducting to other equipment.
As shown in Figure 1, signal source protected location 200 comprises: the first resistance R1 ~ the second resistance R2, the first diode D1 ~ the second diode D2, the second gas discharge tube G2 and Zener diode TVS1; Wherein, the first end of Zener diode TVS1 connects shielding conductor 203, second end connection signal line 204;
The anode of the first diode D1 is connected with the first end of Zener diode TVS1, and negative electrode is connected with the negative electrode of the second diode D2, and the anode of the second diode D2 is connected with second end of Zener diode TVS1;
The first end of the first resistance R1 is connected with the anode of the first diode D1, and the second end is connected with the first end of the second gas discharge tube G2;
The first end of the second resistance R2 is connected with the anode of the second diode D2, and the second end is connected with second end of the second gas discharge tube G2;
3rd end of the second gas discharge tube G2 is connected to tie point f and the public terminal GND of the negative electrode of the first diode D1 and the negative electrode of the second diode D2 respectively.
During normal work, TV signal is injected from the input 201 of signal source protected location 200, flows out from output 202.When signal source protected location receives the surge voltage that shielding conductor 203 and/or holding wire 204 receive, on the one hand the second gas discharge tube G2 by shielding conductor 203 and/or holding wire 204 by tie point b, tie point c and public terminal GND earial drainage over the ground; Surge voltage is by the first resistance R1, the first diode D1, tie point f, tie point b, tie point c and public terminal GND earial drainage over the ground on the other hand, or through the second resistance R2, the second diode D2, tie point f, tie point b, tie point c and public terminal GND earial drainage over the ground.By two branch roads earial drainage over the ground, surge voltage can be released into public terminal GND fast, thus protection TV.
When Zener diode TVS1 stands at two ends the high energy impact events of moment, its impedance can be made suddenly to reduce with high speed, simultaneously stability big current, voltage clamp between its two ends is numerically predetermined at one, thus guarantee that circuit element below damages from the high-octane impact of transient state.
In sum, the Surge Protector that provides of the utility model is by arranging power circuit protected location and signal source protected location is protected power circuit and signal source.By arranging piezo-resistance in power circuit protected location, under normal operation, this piezo-resistance presents high-impedance state.When there is surge voltage, Surge Protector can within unusual short time (nanosecond rank) rapidly with the earth conducting, powerful surge current is introduced the earth, thus protects television set.After this surge voltage disappears, Surge Protector is restored to and the high-impedance state of the earth, thus does not affect television set and normally work.
In the utility model, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.Term " multiple " refers to two or more, unless otherwise clear and definite restriction.
Although describe execution mode of the present utility model by reference to the accompanying drawings, but those skilled in the art can make various modifications and variations when not departing from spirit and scope of the present utility model, such amendment and modification all fall into by within claims limited range.
Claims (3)
1. a cable TV signal Surge Protector, is characterized in that, comprising: power circuit protected location and signal source protected location, and described power circuit protected location is connected common port after being connected with described signal source protected location;
Described power circuit protected location comprises: the first gas discharge tube and the first piezo-resistance ~ the second piezo-resistance, wherein,
The first end of the first piezo-resistance is connected with the first power line, and the second end is connected with the first end of the first gas discharge tube; Second end of the second piezo-resistance is connected with second source line;
Second end of the first gas discharge tube is connected with the first end of the second piezo-resistance, and the three-terminal link of the first gas discharge tube is to common port;
Described signal source protected location comprises: the first resistance ~ the second resistance, the first diode ~ the second diode, the second gas discharge tube and Zener diode; Wherein, the first end of Zener diode connects shielding conductor, the second end connection signal line;
The anode of the first diode is connected with the first end of Zener diode, and negative electrode is connected with the negative electrode of the second diode, and the anode of the second diode is connected with the second end of Zener diode;
The first end of the first resistance is connected with the anode of the first diode, and the second end is connected with the first end of the second gas discharge tube;
The first end of the second resistance is connected with the anode of the second diode, and the second end is connected with the second end of the second gas discharge tube;
3rd end of the second gas discharge tube is connected to tie point and the common port of the negative electrode of the first diode and the negative electrode of the second diode respectively.
2. cable TV signal Surge Protector according to claim 1, is characterized in that, described power circuit protected location also comprises: the 3rd piezo-resistance ~ the 6th piezo-resistance, wherein,
The first end of the 3rd piezo-resistance is connected with the first end of the first piezo-resistance, and the first end that the second end connects the 4th piezo-resistance connects, and the second end of the 4th piezo-resistance is connected with the second end of the second piezo-resistance;
The first end of the 5th piezo-resistance is connected with the first end of the 3rd piezo-resistance, and the first end that the second end connects the 6th piezo-resistance connects, and the second end of the 6th piezo-resistance is connected with the second end of the 4th piezo-resistance;
The tie point of the first end of the tie point of the second end of the 3rd piezo-resistance and the first end of the 4th piezo-resistance, the second end of the 5th piezo-resistance and the 6th piezo-resistance respectively with the three-terminal link of the first gas discharge tube.
3. cable TV signal Surge Protector according to claim 2, is characterized in that, described power circuit protected location also comprises: the first inductance and the second inductance, wherein,
The first end of the first inductance is connected with the first end of the first piezo-resistance, and the second end is connected with the first end of the 3rd piezo-resistance;
The first end of the second inductance is connected with the second end of the second piezo-resistance, and the second end is connected with the second end of the 4th piezo-resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520589220.2U CN204992561U (en) | 2015-08-06 | 2015-08-06 | Cable television signal surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520589220.2U CN204992561U (en) | 2015-08-06 | 2015-08-06 | Cable television signal surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204992561U true CN204992561U (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520589220.2U Active CN204992561U (en) | 2015-08-06 | 2015-08-06 | Cable television signal surge protector |
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| Country | Link |
|---|---|
| CN (1) | CN204992561U (en) |
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- 2015-08-06 CN CN201520589220.2U patent/CN204992561U/en active Active
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |