CN106229961A - Network surge protection circuit - Google Patents
Network surge protection circuit Download PDFInfo
- Publication number
- CN106229961A CN106229961A CN201610675522.0A CN201610675522A CN106229961A CN 106229961 A CN106229961 A CN 106229961A CN 201610675522 A CN201610675522 A CN 201610675522A CN 106229961 A CN106229961 A CN 106229961A
- Authority
- CN
- China
- Prior art keywords
- differential mode
- mode voltage
- surge
- holding wire
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The embodiment of the invention discloses a kind of network surge protection circuit, including: the surge circuit, the surge that are connected in turn between network input and 8 signal line of network output stop circuit, the first differential mode voltage holding circuit and the second differential mode voltage holding circuit.Use the network surge protection circuit that the embodiment of the present invention is provided; high-pressure section in common-mode voltage ripple or differential mode voltage ripple can be released over the ground decay by surge circuit; can ensure that the differential mode voltage between differential signal line is maintained at below certain volt value by the first differential mode voltage holding circuit and the second differential mode voltage holding circuit; make the voltage that network output output is stable, it is ensured that the safety of back end device.
Description
Technical field
The present invention relates to carrying out surge protection technical field, particularly relate to a kind of network surge protection circuit.
Background technology
Surge is the spike that a kind of rate of climb is fast, the persistent period is short, and its Producing reason is many, such as electricity
Net overvoltage, high tension spark electric discharge, thunderbolt etc..Electronic product runs into surge during using can cause the damage of electronic product
Bad, therefore, in order to improve reliability and the personal safety of electronic product, it is necessary to surge is taked safeguard procedures.
Working environment residing for the railway equipment wild environment that usually entirety is open, the working environment special due to it is led
Cause the power supply in railway equipment, communicating and triggering easily there is surge in signal circuit.Such as, equipment under 1, rail edge equipment or rail
Distance railway contact line supply line is relatively near, there is 25KV single phase power supply in railway contact line, supply line away from rail level 5.7～
6.5 meters, equipment cable inner is easily discharged and is affected by power phase place change, contact net power transmission line arcing of contact net and produce wave
Gush.2, part roof apparatus is directly installed on locomotive top, is in high-speed motion environment during work, and equipment is powered, communicates and touched
Signalling loop to be connected by longer cable, easily because of cable cutting magnetic line and passes through contact net at a high speed when high-speed motion
Power-feed section handing-over phase change zone produces induction electromotive force and produces surge at cable inner.3, sudden and violent leakage cable outside is vulnerable to thunder and lightning wave
Gush impact and the electric discharge impact of contact net supply line, alternation can be produced in the certain distance of space in thunderbolt and arcing electric discharge moment
Electromagnetic field, causes circuit magnetic flux change, produces transient pulse surge in the line, to powering in equipment, communication device and touching
Signal and produce impact.
Industrial camera is as typical rail edge equipment, and it powers, communicates and trigger signal circuit will be by the longest electricity
Cable (under normal circumstances more than 10 meters) is connected in the machine room of rail limit, in order to improve the reliability of industrial camera, makes industrial camera
Electric power system overall isolation in the external world electrically, to reduce extraneous thunder and lightning, electromagnetic interference to the interference of communication system and destruction, is needed badly
The signal input port part of communication system is carried out surge protection design.
Summary of the invention
Embodiments provide a kind of network surge protection circuit, be easily subject to solving communication system in prior art
To extraneous thunder and lightning or the technical problem of electromagnetic interference.
In order to solve above-mentioned technical problem, the embodiment of the invention discloses following technical scheme:
A kind of network surge protection circuit, including: it is connected to 8 signal line of network input and network output in turn
Between surge circuit, surge stop circuit, the first differential mode voltage holding circuit and the second differential mode voltage holding circuit；
Described surge circuit includes the one or three pole gas-discharge tube, the two or three pole gas-discharge tube, the three or three pole gas
Body discharge tube and the four or three pole gas-discharge tube, three electrodes of described one or three pole gas-discharge tube connect the first signal respectively
Line, secondary signal line and ground level, three electrodes of described two or three pole gas-discharge tube connect respectively the 3rd holding wire, the 6th
Holding wire and ground level, three electrodes of described three or three pole gas-discharge tube connect the 4th holding wire, the 5th holding wire respectively
And ground level, three electrodes of described four or three pole gas-discharge tube connect the 7th holding wire, the 8th holding wire and ground electricity respectively
Flat；
Described surge stops that circuit includes the first surge blocking unit being connected between the first holding wire, is connected on second
The second surge blocking unit, the 3rd surge blocking unit being connected between the 3rd holding wire between holding wire, it is connected on
The 4th surge blocking unit, the 5th surge blocking unit being connected between the 5th holding wire between four holding wires, it is connected on
The 6th surge blocking unit between 6th holding wire, the 7th surge blocking unit and the series connection being connected between the 7th holding wire
The 8th surge blocking unit between the 8th holding wire；
Described first differential mode voltage holding circuit includes that the first differential mode voltage holding unit, the second differential mode voltage keep single
Unit, the 3rd differential mode voltage holding unit and the 4th differential mode voltage holding unit, the two ends of described first differential mode voltage holding unit
Connecting the first holding wire and secondary signal line respectively, the two ends of described second differential mode voltage holding unit connect the 3rd signal respectively
Line and the 6th holding wire, the two ends of described 3rd differential mode voltage holding unit connect the 4th holding wire and the 5th holding wire respectively,
The two ends of described 4th differential mode voltage holding unit connect the 7th holding wire and the 8th holding wire respectively；
Described second differential mode voltage holding circuit includes the first integrated EMC chip and the second integrated EMC chip, described first
Integrated EMC chip includes that the 5th differential mode voltage holding unit and the 6th differential mode voltage holding unit, described 5th differential mode voltage are protected
The two ends holding unit connect the first holding wire and secondary signal line respectively, and the two ends of described 6th differential mode voltage holding unit are respectively
Connecting the 3rd holding wire and the 6th holding wire, described second integrated EMC chip includes the 7th differential mode voltage holding unit and the 8th
Differential mode voltage holding unit, the two ends of described 7th differential mode voltage holding unit connect the 4th holding wire and the 5th signal respectively
Line, the two ends of described 8th differential mode voltage holding unit connect the 7th holding wire and the 8th holding wire respectively.
Preferably, described one or three pole gas-discharge tube, the two or three pole gas-discharge tube, the three or three pole gas-discharge tube and
The breakdown voltage of the four or three pole gas-discharge tube is configured to 60V-90V.
Preferably, described first surge blocking unit includes that the first resistance, described second surge blocking unit include second
Resistance, described 3rd surge blocking unit includes that the 3rd resistance, described 4th surge blocking unit include the 4th resistance, described
Five surge blocking units include that the 5th resistance, described 6th surge blocking unit include that the 6th resistance, described 7th surge stop
Unit includes that the 7th resistance, described 8th surge blocking unit include the 8th resistance.
Preferably, described first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th
The resistance of resistance and the 8th resistance is configured to 1.8 Ω-2.6 Ω.
Preferably, described first differential mode voltage holding unit includes that the first integrated TVS pipe, described second differential mode voltage keep
Unit includes that the second integrated TVS pipe, described 3rd differential mode voltage holding unit include the 3rd integrated TVS pipe, described 4th differential mode
Voltage holding unit includes the 4th integrated TVS pipe.
Preferably, described first integrated TVS pipe, the second integrated TVS pipe, the 3rd integrated TVS pipe and the 4th integrated TVS pipe
Two-way breakdown voltage is configured to 4V-6V.
Preferably, described 5th differential mode voltage holding unit, the 6th differential mode voltage holding unit, the 7th differential mode voltage keep
The two-way breakdown voltage of unit and the 8th differential mode voltage holding unit is configured to 2.6V-3.9V.
Use the network surge protection circuit that the embodiment of the present invention is provided, when common mode surge occurs, common-mode voltage ripple
Propagating along two differential signal lines, run into surge and stop the stop of circuit, high-pressure section punctures surge circuit, is formed over the ground
Decay of releasing, the value of volt over the ground of common-mode voltage ripple reduces, after common-mode voltage ripple stops circuit by surge, poor by first
Mode voltage holding circuit maintains the differential mode voltage between two differential signal lines to be maintained at below certain volt value, poor by second
Mode voltage holding circuit reduces the differential mode voltage between two differential signal lines further, reduces common-mode voltage ripple to back end device
Infringement.When differential mode surge occurs, the propagation along two differential signal lines of the differential mode voltage ripple, run into surge and stop electricity
After the stop on road, high-pressure section punctures surge circuit, forms decay over the ground and releases, the value of the volt over the ground fall of differential mode voltage ripple
Low, after differential mode voltage ripple stops circuit by surge, maintain two differential signal lines by the first differential mode voltage holding circuit
Between differential mode voltage be maintained at below certain volt value, reduce by two difference further by the second differential mode voltage holding circuit
Differential mode voltage between holding wire, reduces the infringement to back end device of the differential mode voltage ripple.
In sum, use the network surge protection circuit that the embodiment of the present invention is provided, can be simultaneously to differential mode surge
Suppress with common mode surge so that the voltage that network output output is stable, it is ensured that the safety of back end device.
It should be appreciated that it is only exemplary and explanatory, not that above general description and details hereinafter describe
The present invention can be limited.
Accompanying drawing explanation
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet the enforcement of the present invention
Example, and for explaining the principle of the present invention together with description.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of network surge protection circuit that Fig. 1 provides for the embodiment of the present invention；
Symbol table in figure is shown as: 1-the first holding wire, 2-secondary signal line, 3-the 3rd holding wire, 4-the 4th holding wire,
5-the 5th holding wire, 6-the 6th holding wire, 7-the 7th holding wire, 8-the 8th holding wire, 101-network input, 102-network is defeated
Going out end, 103-surge circuit, 104-surge stops circuit, 105-the first differential mode voltage holding circuit, 106-the second differential mode
Voltage hold circuit, G1-the one or three pole gas-discharge tube, G2-the two or three pole gas-discharge tube, G3-the three or three pole gas discharge
Pipe, G4-the four or three pole gas-discharge tube, R1-the first resistance, R2-the second resistance, R3-the 3rd resistance, R4-the 4th resistance, R5-
5th resistance, R6-the 6th resistance, R7-the 7th resistance, R8-the 8th resistance, the integrated TVS pipe of D1-first, the integrated TVS of D2-second
Pipe, the integrated TVS pipe of D3-the 3rd, the integrated TVS pipe of D4-the 4th, U1-first integrated EMC chip, U2-second integrated EMC chip,
PE-ground level.
Detailed description of the invention
Here will illustrate exemplary embodiment in detail, its example represents in the accompanying drawings.Explained below relates to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the present invention.On the contrary, they are only with the most appended
The example of the apparatus and method that some aspects that described in detail in claims, the present invention are consistent.
In a kind of alternative embodiment, the network surge protection circuit shown in the embodiment of the present invention is applied to railway industry
At the Web portal of camera, by the differential mode surge voltage in the network surge protection circuit network signal to input industrial camera
Ripple and common mode surge voltage ripple carry out decay of releasing, it is ensured that the network signal of input industrial camera is stable voltage signal, enters
And ensure the safety of related device in industrial camera.Wherein, the transmission of surge is divided into common mode surge and differential mode surge, common mode wave
Gush the voltage-to-ground spike for transmitting along two differential signal lines simultaneously, transmit two differential signal line inter-syncs；Differential mode wave
Gushing is the pressure reduction spike between two differential signal lines, and the network surge protection circuit that the embodiment of the present invention provides both can be to altogether
Mould surge protects, and can protect differential mode surge again.
The structural representation of a kind of network surge protection circuit that Fig. 1 provides for the embodiment of the present invention, as it is shown in figure 1, this
A kind of network surge protection circuit that inventive embodiments provides includes network input 101 and network output 102, and network inputs
Being connected by 8 signal line between end 101 and network output 102, network output 102 is for connecting the network of industrial camera
Signal receiving module, network input 101 is used for inputting network signal, is then transmitted to network output by 8 signal line
102, and then transmission is to industrial camera.
In embodiments of the present invention, for end-apparatus after preventing network signal to be subject to extraneous thunder and lightning or electromagnetic interference to damage
Part, is additionally provided with network surge protection circuit between network input 101 and network output 102.Network walks differential signal, point
Being the first holding wire 1-secondary signal line 2 (PR1+ and PR1-as in Fig. 1), the 3rd holding wire 3-the 6th holding wire 6 is (such as Fig. 1
In PR2+ and PR2-), the 4th holding wire 4-the 5th holding wire 5 (PR3+ and PR3-as in Fig. 1), the 7th holding wire 7-the 8th
Holding wire 8 (PR4+ and PR4-as in Fig. 1), four pairs of differential signal lines.In the protection circuit of network Anti-surging, should protect
Common mode surge in every pair of differential signal line, protects the differential mode surge in every pair of differential signal line again.
Wherein, network surge protection circuit includes be connected to network input 101 and network output 102 in turn 8
Surge circuit 103, surge between holding wire stop circuit the 104, first differential mode voltage holding circuit 105 and the second differential mode
Voltage hold circuit 106.
Wherein, surge circuit 103 can be released the common-mode voltage ripple in holding wire or the energy in differential mode voltage ripple,
The voltage-to-ground making the voltage difference between every a pair differential signal line or each differential signal line drops to below certain volt value.
In the embodiment of the present application, owing to 8 signal line being intended to carry out carrying out surge protection, therefore, every signal line is intended to connect surge
Releasing device, in the embodiment of the present application, surge device selects gas-discharge tube.Particularly as follows: described surge circuit
103 include the one or three pole gas-discharge tube G1, the two or three pole gas-discharge tube G2, the three or three pole gas-discharge tube G3 and the four or three
Pole gas-discharge tube G4, three electrodes of described one or three pole gas-discharge tube G1 connect the first holding wire 1, secondary signal respectively
Line 2 and ground level PE, three electrodes of described two or three pole gas-discharge tube G2 connect the 3rd holding wire the 3, the 6th signal respectively
Line 6 and ground level PE, three electrodes of described three or three pole gas-discharge tube G3 connect the 4th holding wire the 4, the 5th signal respectively
Line 5 and ground level PE, three electrodes of described four or three pole gas-discharge tube G4 connect the 7th holding wire the 7, the 8th signal respectively
Line 8 and ground level PE.
As a example by the one or three pole gas-discharge tube G1, when the first holding wire 1 and secondary signal line 2 occur common mode surge
Time, the high-pressure section of common-mode voltage ripple punctures the one or three pole gas-discharge tube G1, forms voltage the most over the ground and releases, reduces altogether
Energy in mode voltage ripple；When there is differential mode surge in the first holding wire 1 and secondary signal line 2, differential mode voltage ripple
In high-pressure section puncture the one or three pole gas-discharge tube G1, form voltage the most over the ground and release, reduce in differential mode voltage ripple
Energy.It is to say, no matter there is common mode surge or differential mode surge, all can at the one or three pole gas-discharge tube G1 shape
Voltage in couples is released, and makes the voltage-to-ground in holding wire ensure below certain volt value.Two or three pole gas-discharge tube
G2, the operation principle of the three or three pole gas-discharge tube G3 and the four or three pole gas-discharge tube G4 are referred to above-mentioned one or three pole gas
The description of body discharge tube G1, in order to save length, does not repeats them here.
It addition, the breakdown voltage of gas-discharge tube if it is, then gas-discharge tube pressure performance reduce, if electric
Road exists higher surge voltage ripple and can cause the breakdown damage of gas-discharge tube；If the breakdown voltage of gas-discharge tube sets
Put too high, can cause by the voltage wave volt value of surge circuit 103 too high, cause the device failure of circuit rear end.Therefore,
In one alternative embodiment of the present invention, by the one or three pole gas-discharge tube G1, the two or three pole gas-discharge tube G2, the three or three pole
The breakdown voltage of gas-discharge tube G3 and the four or three pole gas-discharge tube G4 is set to 60-90V, preferably 75V.
Owing to 8 signal line in a communication network are intended to carry out carrying out surge protection, therefore, should divide in 8 signal line
It is not provided with surge blocking device.In one alternative embodiment of the present invention, described surge stops that circuit 104 includes being connected on first
The first surge blocking unit, the second surge blocking unit being connected between secondary signal line 2 between holding wire 1, it is connected on
The 3rd surge blocking unit between 3rd holding wire 3, the 4th surge blocking unit being connected between the 4th holding wire 4, string
The 6th surge be associated in the 5th surge blocking unit between the 5th holding wire 5, being connected between the 6th holding wire 6 stops single
Unit, the 7th surge blocking unit being connected between the 7th holding wire 7 and the 8th surge resistance being connected between the 8th holding wire 8
Gear unit.
As a example by the first surge blocking unit, stop single when the surge voltage ripple in the first holding wire 1 arrives the first surge
By the inhibition of the first surge blocking unit, and then releasing over the ground at the one or three pole gas-discharge tube can be strengthened after unit
Effect.The operation principle of second surge blocking unit the-the eight surge blocking unit and the operation principle of the first surge blocking unit
Identical, in order to save length, do not repeat them here.
All surge voltage ripple is had certain inhibition due to the device such as resistance, inductance, therefore, a kind of in the present invention
In alternative embodiment, surge blocking unit can choose the device such as resistance, inductance.But, in electronic circuit technology field, also deposit
At other, surge voltage ripple being had the device of inhibition, those skilled in the art can select the most accordingly
Selecting, it all should fall under the scope of the present invention.
In one preferred embodiment of the present invention, surge blocking unit selects resistance.Particularly as follows: described first surge stops
Unit includes that the first resistance R1, described second surge blocking unit include the second resistance R2, described 3rd surge blocking unit bag
Including the 3rd resistance R3, described 4th surge blocking unit includes that the 4th resistance R4, described 5th surge blocking unit include the 5th
Resistance R5, described 6th surge blocking unit includes that the 6th resistance R6, described 7th surge blocking unit include the 7th resistance R7,
Described 8th surge blocking unit includes the 8th resistance R8.
From the point of view of in theory, the biggest inhibition to surge voltage ripple of resistance of resistance is the best, but the increasing of the resistance of resistance
Also result in greatly the overall resistance in holding wire to increase, be unfavorable for the transmission of signal.Therefore, in a kind of optional enforcement of the present invention
In example, described first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6,
The resistance of seven resistance R7 and the 8th resistance R8 is configured to 1.8 Ω-2.6 Ω, preferably 2.2 Ω.
In order to make the differential mode voltage between every pair of differential signal line be maintained at below certain volt value, in the embodiment of the present invention
In, stop that at surge the rear end of circuit 104 is additionally provided with the first differential mode voltage holding circuit 105 and the second differential mode voltage holding circuit
106。
Wherein, described first differential mode voltage holding circuit 105 includes the first differential mode voltage holding unit, the second differential mode voltage
Holding unit, the 3rd differential mode voltage holding unit and the 4th differential mode voltage holding unit, described first differential mode voltage holding unit
Two ends connect the first holding wire 1 and secondary signal line 2 respectively, the two ends of described second differential mode voltage holding unit connect respectively
3rd holding wire 3 and the 6th holding wire 6, the two ends of described 3rd differential mode voltage holding unit connect the 4th holding wire 4 He respectively
5th holding wire 5, the two ends of described 4th differential mode voltage holding unit connect the 7th holding wire 7 and the 8th holding wire 8 respectively.
As a example by the first differential mode voltage holding unit, under normal condition, the first differential mode voltage holding unit is in cut-off shape
State.Voltage difference between the first holding wire 1 and secondary signal line 2 punctures more than or equal to the first differential mode voltage holding unit
During voltage, the first differential mode voltage holding unit can energy in breakdown conducting, and then discharge voltage ripple, until the first holding wire
When voltage difference between 1 and secondary signal line 2 is less than the breakdown voltage of the first differential mode voltage holding unit, the first differential mode voltage is protected
Hold unit again to end.It is to say, by setting differential mode voltage holding unit between a pair differential signal line, can be by difference
Voltage difference between sub-signal line is maintained at below the breakdown voltage of differential mode voltage holding unit, reduces differential mode voltage ripple to rear end
The damage of device.Second differential mode voltage holding unit, the 3rd differential mode voltage holding unit and the 4th differential mode voltage holding unit
Operation principle is similar to the first differential mode voltage holding unit, in order to save length, does not repeats them here.
In one alternative embodiment of the present invention, the differential mode voltage in described first differential mode voltage holding circuit 105 keeps
The integrated TVS pipe of Unit selection.Particularly as follows: described first differential mode voltage holding unit includes the first integrated TVS pipe D1, described second
Differential mode voltage holding unit includes that the second integrated TVS pipe D2, described 3rd differential mode voltage holding unit include the 3rd integrated TVS pipe
D3, described 4th differential mode voltage holding unit includes the 4th integrated TVS pipe D4.Wherein, described first integrated TVS pipe D1, second
The two-way breakdown voltage of integrated TVS pipe D2, the 3rd integrated TVS pipe D3 and the 4th integrated TVS pipe D4 is configured to 4V-6V, preferably
For 5V.
As a example by the two-way breakdown voltage of the first integrated TVS pipe D1 is as 5V, if when the first holding wire 1 exist differential mode electricity
Pressure ripple, after differential mode voltage ripple is by the first resistance R1, the voltage difference between the first holding wire 1 and secondary signal line 2 is 8V, i.e.
Now the voltage difference between the first holding wire 1 and secondary signal line 2 is more than the two-way breakdown voltage of the first integrated TVS pipe D1, the
The one breakdown electric discharge of TVS pipe, the voltage difference between the first holding wire 1 and secondary signal line 2 is gradually lowered.When the first holding wire 1
And the voltage difference between secondary signal line 2 less than 5V time, the first integrated TVS pipe D1 is ended again, makes the first holding wire 1 and second
Voltage difference between holding wire 2 is maintained at below 5V, the damage to back end device of the less differential mode voltage ripple.
In order to reduce the differential mode voltage between differential signal line further, after the first differential mode voltage holding circuit 105
End is additionally provided with the second differential mode voltage holding circuit 106.Described second differential mode voltage holding circuit 106 includes the first integrated EMC core
Sheet U1 and the second integrated EMC chip U2, described first integrated EMC chip U1 include the 5th differential mode voltage holding unit and the 6th poor
Mode voltage holding unit, the two ends of described 5th differential mode voltage holding unit connect the first holding wire 1 and secondary signal line respectively
2, the two ends of described 6th differential mode voltage holding unit connect the 3rd holding wire 3 and the 6th holding wire 6 respectively, described second integrated
EMC chip U2 includes that the 7th differential mode voltage holding unit and the 8th differential mode voltage holding unit, described 7th differential mode voltage keep
The two ends of unit connect the 4th holding wire 4 and the 5th holding wire 5 respectively, and the two ends of described 8th differential mode voltage holding unit are respectively
Connect the 7th holding wire 7 and the 8th holding wire 8.Described 5th differential mode voltage holding unit, the 6th differential mode voltage holding unit,
The two-way breakdown voltage of seven differential mode voltage holding units and the 8th differential mode voltage holding unit is configured to 2.6V-3.9V, preferably
For 3.3V.
The differential mode voltage between differential signal line can be reduced further by the second differential mode voltage holding circuit 106, will
Differential mode voltage between differential signal line is reduced to level of security, reduces the infringement to back end device.
Use the network surge protection circuit that the embodiment of the present invention is provided, when common mode surge occurs, common-mode voltage ripple
Propagating along two differential signal lines, run into surge and stop the stop of circuit 104, high-pressure section punctures surge circuit 103, shape
Decay of releasing in couples, the value of volt over the ground of common-mode voltage ripple reduces, after common-mode voltage ripple stops circuit 104 by surge,
By the first differential mode voltage holding circuit 105 maintain the differential mode voltage between two differential signal lines be maintained at certain volt value with
Under, reduced the differential mode voltage between two differential signal lines by the second differential mode voltage holding circuit 106 further, reduce common mode
The voltage wave infringement to back end device.When differential mode surge occurs, a differential mode voltage ripple biography along two differential signal lines
Broadcasting, after running into the stop that surge stops circuit 104, high-pressure section punctures surge circuit 103, forms decay over the ground and lets out
Putting, the value of volt over the ground of differential mode voltage ripple reduces, after differential mode voltage ripple stops circuit 104 by surge, by the first differential mode electricity
Pressure holding circuit 105 maintains the differential mode voltage between two differential signal lines to be maintained at below certain volt value, poor by second
Mode voltage holding circuit 106 reduces the differential mode voltage between two differential signal lines further, reduces differential mode voltage ripple to rear end
The infringement of device.
In sum, use the network surge protection circuit that the embodiment of the present invention is provided, can be simultaneously to differential mode
Surge and common mode surge suppress so that network output 102 exports stable voltage, it is ensured that the safety of back end device.
It should be noted that in this article, such as the relational terms of " first " and " second " or the like is used merely to one
Individual entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or operate it
Between exist any this reality relation or order.And, term " includes ", " comprising " or its any other variant are intended to
Contain comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those
Key element, but also include other key elements being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Other identical element is there is also in including the process of described key element, method, article or equipment.
The above is only the detailed description of the invention of the present invention, makes to skilled artisans appreciate that or realize this
Bright.Multiple amendment to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (7)
1. a network surge protection circuit, it is characterised in that including: be connected to network input (101) in turn and network is defeated
Go out the surge circuit (103) between 8 signal line of end (102), surge stops circuit (104), the first differential mode voltage is protected
Hold circuit (105) and the second differential mode voltage holding circuit (106)；
Described surge circuit (103) include the one or three pole gas-discharge tube (G1), the two or three pole gas-discharge tube (G2),
Three or three pole gas-discharge tubes (G3) and the four or three pole gas-discharge tube (G4), three of described one or three pole gas-discharge tube (G1)
Electrode connects the first holding wire (1), secondary signal line (2) and ground level (PE), described two or three pole gas-discharge tube respectively
(G2) three electrodes connect the 3rd holding wire (3), the 6th holding wire (6) and ground level (PE), described three or three pole gas respectively
Three electrodes of body discharge tube (G3) connect the 4th holding wire (4), the 5th holding wire (5) and ground level (PE) respectively, and described
Three electrodes of four or three pole gas-discharge tubes (G4) connect the 7th holding wire (7), the 8th holding wire (8) and ground level respectively
(PE)；
Described surge stops that circuit (104) includes the first surge blocking unit being connected between the first holding wire (1), is connected on
The second surge blocking unit between secondary signal line (2), the 3rd surge being connected between the 3rd holding wire (3) stop single
Unit, be connected between the 4th holding wire (4) the 4th surge blocking unit, be connected between the 5th holding wire (5) the 5th wave
Gush blocking unit, the 6th surge blocking unit being connected between the 6th holding wire (6), be connected between the 7th holding wire (7)
The 7th surge blocking unit and the 8th surge blocking unit that is connected between the 8th holding wire (8)；
Described first differential mode voltage holding circuit (105) includes that the first differential mode voltage holding unit, the second differential mode voltage keep single
Unit, the 3rd differential mode voltage holding unit and the 4th differential mode voltage holding unit, the two ends of described first differential mode voltage holding unit
Connecting the first holding wire (1) and secondary signal line (2) respectively, the two ends of described second differential mode voltage holding unit connect respectively
Three holding wires (3) and the 6th holding wire (6), the two ends of described 3rd differential mode voltage holding unit connect the 4th holding wire respectively
(4) and the 5th holding wire (5), the two ends of described 4th differential mode voltage holding unit connect the 7th holding wire (7) and the 8th respectively
Holding wire (8)；
Described second differential mode voltage holding circuit (106) includes the first integrated EMC chip (U1) and the second integrated EMC chip
(U2), described first integrated EMC chip (U1) includes the 5th differential mode voltage holding unit and the 6th differential mode voltage holding unit, institute
The two ends stating the 5th differential mode voltage holding unit connect the first holding wire (1) and secondary signal line (2), described 6th differential mode respectively
The two ends of voltage holding unit connect the 3rd holding wire (3) and the 6th holding wire (6), described second integrated EMC chip respectively
(U2) the 7th differential mode voltage holding unit and the 8th differential mode voltage holding unit are included, described 7th differential mode voltage holding unit
Two ends connect the 4th holding wire (4) and the 5th holding wire (5) respectively, and the two ends of described 8th differential mode voltage holding unit connect respectively
Connect the 7th holding wire (7) and the 8th holding wire (8).
Network surge protection circuit the most according to claim 1, it is characterised in that described one or three pole gas-discharge tube
(G1), the two or three pole gas-discharge tube (G2), the three or three pole gas-discharge tube (G3) and the four or three pole gas-discharge tube (G4)
Breakdown voltage is configured to 60V-90V.
Network surge protection circuit the most according to claim 1, it is characterised in that described first surge blocking unit includes
First resistance (R1), described second surge blocking unit includes that the second resistance (R2), described 3rd surge blocking unit include
Three resistance (R3), described 4th surge blocking unit includes that the 4th resistance (R4), described 5th surge blocking unit include the 5th
Resistance (R5), described 6th surge blocking unit includes that the 6th resistance (R6), described 7th surge blocking unit include the 7th electricity
Resistance (R7), described 8th surge blocking unit includes the 8th resistance (R8).
Network surge protection circuit the most according to claim 3, it is characterised in that described first resistance (R1), the second electricity
Resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) and the 8th
The resistance of resistance (R8) is configured to 1.8 Ω-2.6 Ω.
Network surge protection circuit the most according to claim 1, it is characterised in that described first differential mode voltage holding unit
Including the first integrated TVS pipe (D1), described second differential mode voltage holding unit includes the second integrated TVS pipe (D2), the described 3rd
Differential mode voltage holding unit includes that the 3rd integrated TVS pipe (D3), described 4th differential mode voltage holding unit include the 4th integrated TVS
Pipe (D4).
Network surge protection circuit the most according to claim 5, it is characterised in that described first integrated TVS pipe (D1),
The two-way breakdown voltage of two integrated TVS pipe (D2), the 3rd integrated TVS pipe (D3) and the 4th integrated TVS pipe (D4) is configured to 4V-
6V。
Network surge protection circuit the most according to claim 1, it is characterised in that described 5th differential mode voltage keeps single
Unit, the 6th differential mode voltage holding unit, the 7th differential mode voltage holding unit and the 8th the two-way of differential mode voltage holding unit puncture
Voltage is configured to 2.6V-3.9V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610675522.0A CN106229961A (en) | 2016-08-16 | 2016-08-16 | Network surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610675522.0A CN106229961A (en) | 2016-08-16 | 2016-08-16 | Network surge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106229961A true CN106229961A (en) | 2016-12-14 |
Family
ID=57552536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610675522.0A Pending CN106229961A (en) | 2016-08-16 | 2016-08-16 | Network surge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106229961A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711985A (en) * | 2016-12-24 | 2017-05-24 | 大连尚能科技发展有限公司 | Circuit board used for preventing surge of signals |
| CN107171308A (en) * | 2017-07-20 | 2017-09-15 | 四川赛尔特科技有限公司 | Ultrahigh speed Ethernet monitors surge protection device |
| 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 |
| CN113300347A (en) * | 2021-05-27 | 2021-08-24 | 深圳远征技术有限公司 | Surge protection circuit and communication device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200983499Y (en) * | 2006-11-23 | 2007-11-28 | 艾默生网络能源有限公司 | Thunder-prevention circuit of monitoring and collection device network interface |
| CN202190074U (en) * | 2011-07-22 | 2012-04-11 | 南京宁普防雷技术有限公司 | Lightning protection device specially for POE network power supply apparatus |
| CN202488126U (en) * | 2011-12-31 | 2012-10-10 | 青岛国华电子有限公司 | Novel single-circuit video surge protection device |
| CN204391743U (en) * | 2015-01-13 | 2015-06-10 | 四川安邦威斯特电子设备有限公司 | Surge protector |
-
2016
- 2016-08-16 CN CN201610675522.0A patent/CN106229961A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200983499Y (en) * | 2006-11-23 | 2007-11-28 | 艾默生网络能源有限公司 | Thunder-prevention circuit of monitoring and collection device network interface |
| CN202190074U (en) * | 2011-07-22 | 2012-04-11 | 南京宁普防雷技术有限公司 | Lightning protection device specially for POE network power supply apparatus |
| CN202488126U (en) * | 2011-12-31 | 2012-10-10 | 青岛国华电子有限公司 | Novel single-circuit video surge protection device |
| CN204391743U (en) * | 2015-01-13 | 2015-06-10 | 四川安邦威斯特电子设备有限公司 | Surge protector |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711985A (en) * | 2016-12-24 | 2017-05-24 | 大连尚能科技发展有限公司 | Circuit board used for preventing surge of signals |
| CN107171308A (en) * | 2017-07-20 | 2017-09-15 | 四川赛尔特科技有限公司 | Ultrahigh speed Ethernet monitors surge protection device |
| 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 |
| CN113300347A (en) * | 2021-05-27 | 2021-08-24 | 深圳远征技术有限公司 | Surge protection circuit and communication device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106229961A (en) | Network surge protection circuit | |
| CN102110980B (en) | Lightning protection circuit | |
| CN101227087B (en) | PoE port and lightning protection device thereof | |
| CN202009229U (en) | Ethernet feed port group, anti-surge protection circuit and Ethernet feed equipment | |
| CN104218557B (en) | A kind of lightning protection circuit | |
| CN203339687U (en) | High speed and high frequency signal port surge protection circuit | |
| CN201994655U (en) | Lightning protector for power supply network of Ethernet | |
| CN202159972U (en) | Signal lightning protection device | |
| CN102709902A (en) | Surge current protection device | |
| CN203674707U (en) | Network power supply two-in-one lightning protection device | |
| CN102594573A (en) | Ethernet power supply sensor network | |
| CN202142847U (en) | Multi-stage pressure limiting signal surge protector | |
| CN206041497U (en) | Middling pressure power line broadband bridge power filter module | |
| CN203415974U (en) | Novel lightning protection box | |
| CN101447877A (en) | Industrial Ethernet device based on intrinsic safety and signal processing method thereof | |
| CN106959407A (en) | It is a kind of to improve TVS diode insulation and pressure-resistant filter circuit | |
| CN204290308U (en) | A kind of lightning protection circuit | |
| CN205646796U (en) | Mining monitoring substation surge protection circuit | |
| CN102332816A (en) | Underground power supply anti-jamming protection circuit | |
| CN101976831A (en) | Gigabit LAN (Local Area Network) lightning arrester with PoE (Power on Ethernet) function | |
| CN106099893A (en) | Trigger signal surge protection circuit | |
| CN205263985U (en) | Multi -sensor fusion's electric fire monitored control system | |
| CN201854028U (en) | Gigabit network thunder preventer with function of PoE (Power over Ethernet) | |
| CN207117178U (en) | A kind of signal Surge Protector | |
| CN206806997U (en) | Band EMI and anti-lightning surge a kind of RS485 port protection circuits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161214 |
|
| WD01 | Invention patent application deemed withdrawn after publication |