CN206931997U - A kind of single channel HD video lightning protection device - Google Patents
A kind of single channel HD video lightning protection device Download PDFInfo
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- CN206931997U CN206931997U CN201720883734.8U CN201720883734U CN206931997U CN 206931997 U CN206931997 U CN 206931997U CN 201720883734 U CN201720883734 U CN 201720883734U CN 206931997 U CN206931997 U CN 206931997U
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Abstract
The utility model discloses a kind of single channel HD video lightning protection device, two bridges are provided between a-signal line and B signal line, bridge close to Interface Terminal J1 includes discharge tube G1, low di-cap F1 between line, discharge tube G1 one end is connected on B signal line between line, and the discharge tube G1 other end is connected with low di-cap F1 one end between line；The other end at discharge tube G1 ends is connected on a-signal line between low di-cap F1 connecting lines；Bridge close to Interface Terminal J2 includes discharge tube G2, low di-cap F2 between line, and discharge tube G2 one end is connected on a-signal line between line, and the discharge tube G2 other end is connected with low di-cap F2 one end between line；The other end at discharge tube G2 ends is connected on B signal line between low di-cap F2 connecting lines.The utility model realizes the bidirectional protective to input and equipment end, the comprehensive directionless invasion for preventing lightning current by setting two specific bridges and the over the ground circuit of aerial drainage between signal wire.
Description
Technical field
It the utility model is related to lightning protection field, and in particular to a kind of single channel HD video lightning protection device.
Background technology
Surge protector (Surge Protection Devices), abbreviation SPD, also referred to as Surge Protector, overvoltage are protected
Device is protected, is commonly called as arrester, lightning protection device.Lightning protection device element has soft or hard two kinds in terms of response characteristic.Belong to the electric discharge of hard response characteristic
Element has spark gap (based on the angle-style gap and coaxial discharge gap for cutting arc technology) and gas-discharge tube to belong to soft sound
Answering the arresting element of characteristic has metal oxide piezo-resistance and Transient Suppression Diode.The difference of these elements is the energy that discharges
Power, response characteristic and residual voltage, arrester are exactly to utilize their different advantage and disadvantage, maximize favourable factors and minimize unfavourable ones, are combined into various arresters, are protected
Protection circuit.
Wherein, the principle of discharging gap is the electrode of two such as ox horn present situations, and distance is very short, is separated with insulating materials, when
When two interelectrode electric-field intensity reach breakdown strength, current path is formed between electrode.It is first when lightning wave is come
It is first to puncture in gap location, make the air ionization in gap, form short circuit, lightning current is flowed into greatly by gap, and now gap two
The voltage at end is very low, so as to reach the purpose of protection circuit.When electric-field intensity is less than breakdown gap, discharging gap type arrester is again
Recover state of insulation.It is usually used in the lighting protection of high-tension line.In low-pressure system, it is usually used in the prime protection of power supply.
Gas-discharge tube (Gas discharge tube, GDT) is a kind of ceramics or glass-encapsulated, is filled with again in pipe certain
The inert gas (such as argon gas) of pressure, the protection element of switching mode, there are two kinds of structures of two electrodes and three electrodes.When electric-field intensity reaches
During to breakdown inert gas intensity, just cause gap discharge, so as to limit the voltage of interpolar.8/20 μ s pulse currents can be dredged
10KA.Discharge voltage is unstable, when voltage is more than 12V, Current Voltage 100mA, can produce subsequent current.It is generally used for surveying
In amount, control, regulation technology circuit and electronic data processing transmission circuit.
Video lightning protection device is one kind more conventional in Surge Protector, is the important embodiment of internal lighting protection, falls within weak
The category of electric system.Primarily to avoid the lightning protection that video monitoring system installs additional by the lightning current to come along line influence
Product.
In the prior art, applying charge gap principle or gas-discharge tube, the list of Video transmission system can only all be realized
To lightning protection, video lightning protection device is so resulted in during actual installation use, it is possible that installation error when installation,
Cause lightning protection device to lose the due effect of lightning protection, it is bigger the problem of be that intrusion of the lightning current to circuit or equipment is regardless of direction
, lightning protection device of the prior art can not play due comprehensive protective effect, due to prior art lightning protection device for
Video data rate transmission has considerable influence, causes transmission rate to reduce, it is impossible to meet video data transmission rate requirement.
Utility model content
Technical problem to be solved in the utility model be lightning protection device of the prior art can only unidirectional lightning protection, can not play
Comprehensive protective effect is realized to input and equipment end, and it is an object of the present invention to provide a kind of single channel HD video lightning protection device
Bidirectional protective, the comprehensive directionless invasion for preventing lightning current.
The utility model is achieved through the following technical solutions：
A kind of single channel HD video lightning protection device, including Interface Terminal J1, Interface Terminal J2, the Interface Terminal J1 include
J1-1 terminals and J1-2 terminals, the Interface Terminal J2 includes J2-1 terminals and J2-2 terminals, described
J1-1 terminals are connected with J2-1 terminals by signal wire, and the signal wire is designated as a-signal line；The J1-2 terminals
It is connected with J2-2 terminals by signal wire, the signal wire is designated as B signal line, and two are provided between a-signal line and B signal line
Individual bridge, two bridge parallel connections, wherein,
Include discharge tube G1, low di-cap F1 between line close to Interface Terminal J1 bridge, discharge tube G1 between the line
One end is connected on B signal line, and the tie point of discharge tube G1 and B signal line is designated as node c between line, and discharge tube G1's is another between line
End is connected with low di-cap F1 one end；The other end at discharge tube G1 ends is connected between the low di-cap F1 connecting lines
On a-signal line, the tie point between low di-cap F1 and a-signal line is designated as node a；
Include discharge tube G2, low di-cap F2 between line close to Interface Terminal J2 bridge, discharge tube G2 between the line
One end is connected on a-signal line, and the tie point of discharge tube G2 and a-signal line is designated as node b between line, and discharge tube G2's is another between line
End is connected with low di-cap F2 one end；The other end at discharge tube G2 ends is connected between the low di-cap F2 connecting lines
On B signal line, the tie point between low di-cap F2 and B signal line is designated as node d；
Also including discharge tube G3 and over the ground discharge tube G4 over the ground, the described G3 of discharge tube over the ground one end is connected on a-signal line,
The tie point of discharge tube G3 and a-signal line is between node a and node b over the ground, over the ground discharge tube G3 other end ground connection；Institute
State discharge tube G4 one end over the ground to be connected on B signal line, the tie point of discharge tube G4 and B signal line is in node c and section over the ground
Between point d, the discharge tube G4 other end is grounded over the ground；Discharge tube G3 and discharge tube G4 common grounds over the ground over the ground.
Discharge tube is a kind of high voltage protective element for being used in equipment input.If the voltage at its both ends exceeds its protection rule
Short circuit phenomenon occurs during lattice value, inside it, and sponges the mistake high pressure of input.Discharge tube is divided into gas-discharge tube and semiconductor
Discharge tube.Wherein, gas-discharge tube can regard a symmetrical switch with very little electric capacity as, and it is in normal working conditions
Shut-off, its electrode resistance reaches more than mega-ohms.When surge voltage exceedes the compressive resistance of circuit system, gas-discharge tube quilt
Puncture and arc discharge phenomenon occurs, because arc photoelectric is forced down, only tens volts, so as to limit surge electricity in a short time
That presses is further up.Gas-discharge tube is exactly to limit surge voltage using above-mentioned principle, plays overvoltage protection to circuit
's.It is a kind of PNPN elements that semiconductor discharge tube, which is also referred to as solid discharging tube, and it can be counted as a freely electricity without gate electrode
The controllable silicon of voltage-controlled system, when voltage exceedes its off-state crest voltage or makees avalanche voltage, semiconductor discharge tube can be by wink
State voltage clamping is within the switching voltage of element or break over voltage value.Voltage continue increase when, semiconductor discharge tube due to
Negative resistance effect enters conducting state.Only when electric current is less than maintenance electric current, element can just reset and return to its high resistant
Anti- state.Therefore, can be drawn from the operation principle and process of two kinds of discharge tubes, discharge tube in no experience lightning current so
Surge current when, discharge tube does not turn on.
In the utility model, Interface Terminal J1 can connect signal input part or equipment end, and Interface Terminal J2 can connect
Signal input part or equipment end are connect, it is for convenience, described below on condition that Interface Terminal J1 connection signal input parts,
Interface Terminal connects equipment end.Equipment end herein is the coaxial video signal transmission apparatus that bnc interface mode connects.
The intrusion of lightning current is may to enter regardless of direction, lightning current from signal input part, it is also possible to which slave unit end is entered
Enter.
When no lightning current invades, due to the working characteristics of discharge tube, two between a-signal line and B signal line
Individual bridge carries out normal data between Interface Terminal J1 and Interface Terminal J2 equivalent to open circuit by a-signal line and B signal line
Transmission.
When lightning current flows into from Interface Terminal J1 inflows, that is, from signal input part, concrete condition is as follows：
When lightning current enters from the B signal line of lightning protection unit, because the voltage between a-signal line and B signal line increases suddenly
Greatly, discharge tube G1 is turned between line, and B signal line turns on the intermediate node c of a-signal line with the bridge between node a, and lightning current is from connecing
Mouthful terminal J1 enters, from node c pass sequentially through line between discharge tube G1, low di-cap F1 flow through node a, due to discharging over the ground
The ends of pipe G3 mono- are connected on a-signal line, and other end ground connection, the voltage at discharge tube G3 both ends is very high over the ground, therefore, discharge tube G3 over the ground
It is conducting, lightning current flows through discharge tube G3 aerial drainages over the ground over the ground after node a outflows；
When lightning current enters from the a-signal line of lightning protection unit, because the voltage between a-signal line and B signal line increases suddenly
Greatly, discharge tube G2 is turned between line, and B signal line turns on the intermediate node b of a-signal line with the bridge between node d, and lightning current is from connecing
Mouthful terminal J1 enters, from node b pass sequentially through line between discharge tube G2, low di-cap F2 flow through node d, due to discharging over the ground
The ends of pipe G4 mono- are connected on a-signal line, and other end ground connection, the voltage at discharge tube G4 both ends is very high over the ground, therefore, discharge tube G4 over the ground
It is conducting, lightning current flows through discharge tube G4 aerial drainages over the ground over the ground after node d outflows；So as to prevent lightning current to invade interface
The equipment end of terminal J2 connections, the equipment for protecting connection.
When lightning current flows into from Interface Terminal J2 inflows, that is, slave unit end, concrete condition is as follows：
When lightning current enters from the B signal line of lightning protection unit, because the voltage between a-signal line and B signal line increases suddenly
Greatly, discharge tube G2 is turned between line, and a-signal line turns on the intermediate node b of B signal line with the bridge between node d, and lightning current is from connecing
Mouthful terminal J2 enters, from node b pass sequentially through line between discharge tube G2, low di-cap F2 flow through node d, due to discharging over the ground
The ends of pipe G4 mono- are connected on B signal line, and other end ground connection, the voltage at discharge tube G4 both ends is very high over the ground, therefore, discharge tube G4 over the ground
It is conducting, lightning current flows through discharge tube G4 aerial drainages over the ground over the ground after node d outflows；
When lightning current enters from the a-signal line of lightning protection unit, because the voltage between a-signal line and B signal line increases suddenly
Greatly, discharge tube G1 is turned between line, and a-signal line turns on the intermediate node c of B signal line with the bridge between node a, and lightning current is from connecing
Mouthful terminal J2 enters, from node c pass sequentially through line between discharge tube G1, low di-cap F1 flow through node a, due to discharging over the ground
The ends of pipe G3 mono- are connected on a-signal line, and other end ground connection, the voltage at discharge tube G3 both ends is very high over the ground, therefore, discharge tube G3 over the ground
It is conducting, lightning current flows through discharge tube G3 aerial drainages over the ground over the ground after node a outflows；So as to prevent lightning current to invade interface
The signal input part of terminal J1 connections, protect the relevant device of Interface Terminal J1 connections.
Hereby it is achieved that the bidirectional protective of the side apparatus of lightning protection device two, solves the problems, such as the application proposition.
Further, unilateral diode D1, the list are also in series with the circuit between node a and low di-cap F1
It is connected to diode D1 anode with low di-cap F1, the negative electrode of the unilateral diode D1 is connected with node a；Node d
Unilateral diode D2, the unilateral diode D2 anode and low electricity are also in series with circuit between low di-cap F2
Hold diode F2 connections, the negative electrode of the unilateral diode D2 is connected with node d.
When the signal frequency or higher transmission rate of a-signal line and B signal line, if between a-signal line and B signal line
Line pair between equivalent capacity it is higher, the signal frequency or transmission rate of signal wire can be reduced, therefore, in order to reduce total equivalent electric
Hold, unilateral diode is provided with two bridges, for improving frequency transmission signal or transmission rate.The utility model exists
By the tube discharge that discharges between line, then by low di-cap combination unilateral diode, the equivalent capacity of whole circuit is reduced,
Equivalent capacity Cj≤ 3pF, adequately protected being realized whole line, and realize the data transfer of high-speed.
As shown in Table 1, the electrical characteristic data table measured when table one is 25 DEG C, can draw, junction capacity is equivalent from table
It electric capacity very little, can be adequately protected being realized whole line, and realize the data transfer of high-speed.
Table one
Further, as the signal frequency W >=10MHz or Interface Terminal J1 between Interface Terminal J1 and Interface Terminal J2
Transmission rate R >=10Mb/s between Interface Terminal J2, equivalent capacity C between the line pair between a-signal line and B signal linej≤
60pF。
Further, as the signal frequency W >=100MHz or Interface Terminal between Interface Terminal J1 and Interface Terminal J2
Transmission rate R >=100Mb/s between J1 and Interface Terminal J2, equivalent capacity C between the line pair between a-signal line and B signal linej
≤20pF。
Further, the low di-cap F1 and low di-cap F2 uses SELC08CI series of diode.
It is in order to reduce total equivalent capacity between signal wire, for improving frequency transmission signal from SELC08CI series of diode
Or transmission rate.
Further, the circuit between the Interface Terminal J1 and Interface Terminal J2 and device are integrated on pcb board, institute
It is four-layer structure to state pcb board, and pcb board is from top to bottom followed successively by top layer, PE1 layers, PE2 layers and bottom, wherein, discharge tube over the ground
G3, discharge tube G4 is arranged on PE2 layers and PE1 layers over the ground；Bridge, close Interface Terminal J2 bridge close to Interface Terminal J1 are set
Put in bottom and top layer.
At present, what is used in lightning protection device is all two-layer wiring, because high-speed data signal has very strong wear in transmission
Permeability, easily produce line between, the noise jamming of line pair, therefore, the utility model between top layer and bottom be provided with PE1 layers and
Two layers of separation layer of PE2 layers, and the ground wire drawn with inside and outside laminate connects together, and is so combined into multilayer circuit board, realizes good
Good ground connection and isolation, reduce between line, the noise jamming of line pair, ensure that the high rate data transmission of high speed signal.Prior art
The transmission rate of high speed signal i.e. coaxial video signal is 20Mbps, and a small number of products can reach 1.485Gbps, this practicality
The transmission rate that New Energy reaches is 3Gbps, and more than 100% is improved in the transmission rate in currently available technology.
Further, the pcb board thickness is 1.60 ± 0.18mm.Sheet material is thicker smaller to data penetrability and interference,
And 1.60 ± 0.18mm is sheet metal thickness and the double preferable thickness guarantees ensured of interference free performance, sheet material had both been saved, had been ensured
Size is smaller, and and can realizes interference free performance.
Further, the copper thickness used on the pcb board is 1/1oz, i.e., the one of 1 ounce point.Copper foil is thicker logical resistance to
Impact is stronger, but the thickness of copper foil is bigger, and cost is higher, and 1 ounce point one can balance cost and impact resistance well
Between contradiction.
The utility model compared with prior art, has the following advantages and advantages：
1st, the utility model is realized by setting two specific bridges and the over the ground circuit of aerial drainage between signal wire
To input and the bidirectional protective of equipment end, the comprehensive directionless invasion for preventing lightning current；
2nd, the utility model provides four layers of wiring, two layers separation layer is set up between top layer and bottom, reduces line
Between, the noise jamming of line pair, ensure the high rate data transmission of high speed signal of knowing clearly；
3rd, the transmission rate that coaxial video data transmissions of the present utility model reach is 3Gbps, and is deposited in the prior art
Flank speed be 1.485Gbps, improve more than 100% in the transmission rate in currently available technology.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：
Fig. 1 is the utility model structure diagram；
Fig. 2 is the utility model pcb board layer structure schematic diagram；
Fig. 3 and Fig. 4 is the simple circuit figure of lightning protection device in the prior art.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, it is not intended as to restriction of the present utility model.
Embodiment 1
As shown in figure 1, a kind of single channel HD video lightning protection device, including Interface Terminal J1, Interface Terminal J2, the interface end
Sub- J1 includes J1-1 terminals and J1-2 terminals, and the Interface Terminal J2 includes J2-1 terminals and J2-2 wiring
End, the J1-1 terminals are connected with J2-1 terminals by signal wire, and the signal wire is designated as a-signal line；The J1-2
Number terminals are connected with J2-2 terminals by signal wire, and the signal wire is designated as B signal line, between a-signal line and B signal line
It is provided with two bridges, two bridge parallel connections, wherein,
Include discharge tube G1, low di-cap F1 between line close to Interface Terminal J1 bridge, discharge tube G1 between the line
One end is connected on B signal line, and the tie point of discharge tube G1 and B signal line is designated as node c between line, and discharge tube G1's is another between line
End is connected with low di-cap F1 one end；The other end at discharge tube G1 ends is connected between the low di-cap F1 connecting lines
On a-signal line, the tie point between low di-cap F1 and a-signal line is designated as node a；
Include discharge tube G2, low di-cap F2 between line close to Interface Terminal J2 bridge, discharge tube G2 between the line
One end is connected on a-signal line, and the tie point of discharge tube G2 and a-signal line is designated as node b between line, and discharge tube G2's is another between line
End is connected with low di-cap F2 one end；The other end at discharge tube G2 ends is connected between the low di-cap F2 connecting lines
On B signal line, the tie point between low di-cap F2 and B signal line is designated as node d；
Also including discharge tube G3 and over the ground discharge tube G4 over the ground, the described G3 of discharge tube over the ground one end is connected on a-signal line,
The tie point of discharge tube G3 and a-signal line is between node a and node b over the ground, over the ground discharge tube G3 other end ground connection；Institute
State discharge tube G4 one end over the ground to be connected on B signal line, the tie point of discharge tube G4 and B signal line is in node c and section over the ground
Between point d, the discharge tube G4 other end is grounded over the ground；Discharge tube G3 and discharge tube G4 common grounds over the ground over the ground.
Unilateral diode D1, the unilateral diode are also in series with circuit between node a and low di-cap F1
D1 anode is connected with low di-cap F1, and the negative electrode of the unilateral diode D1 is connected with node a；Node d and low electric capacity
Unilateral diode D2, the unilateral diode D2 anode and low di-cap are also in series with circuit between diode F2
F2 connections, the negative electrode of the unilateral diode D2 are connected with node d.
As the signal frequency W >=10MHz or Interface Terminal J1 and interface end between Interface Terminal J1 and Interface Terminal J2
Transmission rate R >=10Mb/s between sub- J2, equivalent capacity C between the line pair between a-signal line and B signal linej≤60pF。
As the signal frequency W >=100MHz or Interface Terminal J1 and interface end between Interface Terminal J1 and Interface Terminal J2
Transmission rate R >=100Mb/s between sub- J2, equivalent capacity C between the line pair between a-signal line and B signal linej≤20pF。
Low di-cap F1 and low di-cap F2 uses SELC08CI series of diode.
Discharge tube between line：1206 encapsulation, precision 1%, 90V
Discharge tube over the ground：1812 encapsulation, precision 1%, 90V
Low di-cap：SELC08CI series, 3216 encapsulation, 12.0CA
Unilateral diode：1210 encapsulation, 12.0CA.
As shown in Figure 3 and Figure 4, all it is the operating circuit of lightning protection device in the prior art, all strictly has distinguished outgoing direction, this
Just do not meet lightning current and flee feature i.e. regardless of direction；It is all larger using the discharge tube of device and TVS electric capacity, which limits
Bandwidth, the high bandwidth that the utility model can reach is not reached.
Embodiment 2
The present embodiment and the difference of embodiment 1 be, circuit and device between Interface Terminal J1 and Interface Terminal J2
It is integrated on pcb board, as shown in Fig. 2 the pcb board is four-layer structure, pcb board is from top to bottom followed successively by top layer, PE1 layers, PE2
Layer and bottom, wherein, over the ground discharge tube G3, discharge tube G4 is arranged on PE2 layers and PE1 layers over the ground；Close to Interface Terminal J1 bridge
Road, the bridge close to Interface Terminal J2 are arranged on bottom and top layer.
Whole pcb board 1.60 ± 0.18mm of thickness, overlay coating is chemical nickel and gold.Pcb board material is FR4 and Rogers4350
Radio frequency sheet material mixing compacting forms.The dielectric loss of the sheet material measures under identical standard, and only 0.0009, extremely low medium damage
Consumption makes it be highly suitable for high frequency and wide-band application that requirement minimizes dispersion and loss, and its highest supports frequency up to Ku ripples
Section even more high frequency.Additionally there is extremely low hydroscopicity, only 0.02%, the characteristic makes it high humidity environment application
Ideal chose.
Top layer：By 1/1oz copper foil combination Interface Terminal J1/ Interface Terminal J2 pins, 1-2 lines pair are laid out；
PE1 layers：Discharged over the ground aerial drainage by 1/1oz copper foils；
PE2 layers：Discharged over the ground aerial drainage by 1/1oz copper foils；
Bottom：By 1/1oz copper foil combination Interface Terminal J2/ Interface Terminal J1 pins, 1-2 lines pair are laid out；
2 layers of ectonexine medium design isolator, to the penetrability of high speed data transfer has fine protection.
The copper thickness used on pcb board is 1/1oz, i.e., the one of 1 ounce point.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (8)
1. a kind of single channel HD video lightning protection device, including Interface Terminal J1, Interface Terminal J2, the Interface Terminal J1 include J1-1
Number terminals and J1-2 terminals, the Interface Terminal J2 include J2-1 terminals and J2-2 terminals, the J1-1
Number terminals are connected with J2-1 terminals by signal wire, and the signal wire is designated as a-signal line；The J1-2 terminals with
J2-2 terminals are connected by signal wire, and the signal wire is designated as B signal line, it is characterised in that a-signal line and B signal line it
Between be provided with two bridges, two bridge parallel connections, wherein,
Include discharge tube G1, low di-cap F1 between line close to Interface Terminal J1 bridge, discharge tube G1 one end between the line
Be connected on B signal line, the tie point of discharge tube G1 and B signal line is designated as node c between line, between line the discharge tube G1 other end with
Low di-cap F1 one end connection；The other end at discharge tube G1 ends is connected to A letters between the low di-cap F1 connecting lines
On number line, the tie point between low di-cap F1 and a-signal line is designated as node a；
Include discharge tube G2, low di-cap F2 between line close to Interface Terminal J2 bridge, discharge tube G2 one end between the line
Be connected on a-signal line, the tie point of discharge tube G2 and a-signal line is designated as node b between line, between line the discharge tube G2 other end with
Low di-cap F2 one end connection；The other end at discharge tube G2 ends is connected to B letters between the low di-cap F2 connecting lines
On number line, the tie point between low di-cap F2 and B signal line is designated as node d；
Also include discharge tube G3 and over the ground discharge tube G4 over the ground, the described G3 of discharge tube over the ground one end is connected on a-signal line, over the ground
The tie point of discharge tube G3 and a-signal line is between node a and node b, over the ground discharge tube G3 other end ground connection；It is described right
Ground discharge tube G4 one end is connected on B signal line, over the ground the tie point of discharge tube G4 and B signal line be in node c and node d it
Between, the discharge tube G4 other end is grounded over the ground；Discharge tube G3 and discharge tube G4 common grounds over the ground over the ground.
2. a kind of single channel HD video lightning protection device according to claim 1, it is characterised in that node a and the low pole of electric capacity two
Unilateral diode D1 is also in series with circuit between pipe F1, the anode of the unilateral diode D1 connects with low di-cap F1
Connect, the negative electrode of the unilateral diode D1 is connected with node a；Also connected on circuit between node d and low di-cap F2
There is unilateral diode D2, the anode of the unilateral diode D2 is connected with low di-cap F2, the unilateral diode D2's
Negative electrode is connected with node d.
3. a kind of single channel HD video lightning protection device according to claim 1, it is characterised in that when Interface Terminal J1 and interface
Transmission rate R >=10Mb/ between signal frequency W >=10MHz or Interface Terminal J1 and Interface Terminal J2 between terminal J2
S, equivalent capacity C between the line pair between a-signal line and B signal linej≤60pF。
4. a kind of single channel HD video lightning protection device according to claim 1, it is characterised in that when Interface Terminal J1 and interface
The transmission rate R between signal frequency W >=100MHz or Interface Terminal J1 and Interface Terminal J2 between terminal J2 >=
100Mb/s, equivalent capacity C between the line pair between a-signal line and B signal linej≤20pF。
A kind of 5. single channel HD video lightning protection device according to claim 1, it is characterised in that the low di-cap F1
SELC08CI series of diode is used with low di-cap F2.
6. according to any described a kind of single channel HD video lightning protection device in claim 1 to 5, it is characterised in that the interface
Circuit and device between terminal J1 and Interface Terminal J2 are integrated on pcb board, and the pcb board is four-layer structure, pcb board by
Up to be followed successively by top layer, PE1 layers, PE2 layers and bottom down, wherein, over the ground discharge tube G3, discharge tube G4 is arranged on PE2 layers over the ground
With PE1 layers；Bridge, close Interface Terminal J2 bridge close to Interface Terminal J1 are arranged on bottom and top layer.
7. a kind of single channel HD video lightning protection device according to claim 6, it is characterised in that the pcb board thickness is
1.60±0.18mm。
8. a kind of single channel HD video lightning protection device according to claim 6, it is characterised in that used on the pcb board
Copper thickness is 1/1oz, i.e., the one of 1 ounce point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883734.8U CN206931997U (en) | 2017-07-20 | 2017-07-20 | A kind of single channel HD video lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720883734.8U CN206931997U (en) | 2017-07-20 | 2017-07-20 | A kind of single channel HD video lightning protection device |
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| Publication Number | Publication Date |
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| CN206931997U true CN206931997U (en) | 2018-01-26 |
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| CN201720883734.8U Active CN206931997U (en) | 2017-07-20 | 2017-07-20 | A kind of single channel HD video lightning protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230973A (en) * | 2017-07-20 | 2017-10-03 | 四川赛尔特科技有限公司 | A kind of single channel 3G HD videos Bidirectional lightning protection device |
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2017
- 2017-07-20 CN CN201720883734.8U patent/CN206931997U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107230973A (en) * | 2017-07-20 | 2017-10-03 | 四川赛尔特科技有限公司 | A kind of single channel 3G HD videos Bidirectional lightning protection device |
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