CN101546909A - Protective circuit, communication equipment and method for protecting device in communication equipment - Google Patents
Protective circuit, communication equipment and method for protecting device in communication equipment Download PDFInfo
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- CN101546909A CN101546909A CN200810066182A CN200810066182A CN101546909A CN 101546909 A CN101546909 A CN 101546909A CN 200810066182 A CN200810066182 A CN 200810066182A CN 200810066182 A CN200810066182 A CN 200810066182A CN 101546909 A CN101546909 A CN 101546909A
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Abstract
The embodiment of the invention discloses a protective circuit. The protective circuit comprises a transformer, wherein a secondary winding of the transformer is connected with a device 10; primary windings of the transformer are connected with an external connection line a and an external connection line b; a high-pass filtering device 30 is connected between the external connection line a and the primary winding c of the transformer; a high-pass filtering device 50 is connected between the external connection line b and the primary winding d; a protective device v1 and a protective device v2 are connected between the external connection line a and the external connection line b; an earth wire is arranged between the protective device v1 and the protective device v2; and the protective device v1 and the protective device v2 are positioned among the high-pass filtering device 30, the high-pass filtering device 50, the external connection line a and the external connection line b. The embodiment of the invention also discloses communication equipment with the protective circuit and a method for protecting the communication equipment. The protective circuit realizes low voltage protection through the high-pass filtering devices, realizes high voltage protection through the protective device v1 and the protective device v2, and can well protect the device on the secondary side of the transformer without labor maintenance.
Description
Technical field
The present invention relates to the antistatic and the shocking preventing technology of the communications field, particularly, the present invention relates to the means of defence of device in a kind of protective circuit, a kind of communication equipment and the communication equipment.
Background technology
The balancing twisted-pair line signaling interface of using always on the communication equipment, as analog subscriber mouth, ADSL (Asymmetric Digital Subscriber Line), VDSL (Very High Bit Rate DSL) etc., when outdoor transmission range is more than 1000 meters, Lightning Electromagnetic Pulse just can be responded to bigger temporary overvoltage in these signal lines and loop thereof, the collision of high-voltage power line induction and 220V civil power also can make on these signaling interface bands than higher power-frequency voltage in addition.This temporary overvoltage and power frequency point are pressed the device that is easy to damage transformer secondary, therefore, in order to make the safe and reliable operation of this communication equipment, must take measures, and the overvoltage of signal port circuit is protected.
In the existing signaling interface overvoltage protection scheme; generally be adopt the TSS pipe (Thyristor SurgeSuppressor: Transient Suppression Diode) and fuse overvoltage is protected; this TSS pipe is a kind of FV, and the nonlinear switching characteristic of utilizing device is clamped to the magnitude of voltage that is approximately 0V with overvoltage and realizes protection to late-class circuit.See also Fig. 1, balanced line signal port protective circuit comprises: internal circuit 20, be connected in meeting outside line a and meeting outside line b on the internal circuit 20, and this connects and is in series with fuse F1 on the outside line a, and this connects and is in series with fuse F2, protection device VD1, VD2, VD3 on the outside line b.This protection device VD1, VD2, VD3 are the TSS pipe, and wherein, the two ends of VD1 are connected to and connect on the outside line a reconciliation outside line b, and VD2 is connected and connects between outside line a and the ground, and VD3 is connected and connects between outside line b and the ground.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:
This line equalize signal in actual use; touched by power induction and power line or the influence of thunder and lightning, adopt fuse F1, F2 to carry out overcurrent protection, after fuse F1, F2 are blown; usually need the artificial fuse of changing, increased the manual maintenance cost in actual use.
Summary of the invention
Embodiments of the invention provide the means of defence of device in a kind of protective circuit or a kind of communication equipment or the communication equipment; low-frequency interference signal in the signal is passed through the high pass filter filtering; interference common-mode signal in the signal is by the protection device bleed off; the device of protection transformer secondary need not manual maintenance.
The embodiment of the invention provides a kind of protective circuit, comprise transformer B1, wherein, the secondary winding interface unit 10 of described transformer B1, the elementary winding of described transformer B1 meets outside line a and meets outside line b, wherein, be connected with high-pass filtering device 30 between the described elementary winding c that meets outside line a and described transformer B1, be connected with high-pass filtering device 50 between the described elementary winding d that meets outside line b and described transformer B1; Described meet outside line a and connect be connected with protection device v1, protection device v2 between the outside line b, and between described protection device v1 and described protection device v2, an earth connection is arranged; Wherein, described protection device v1, protection device v2 are at described high-pass filtering device 30, high-pass filtering device 50 and meet outside line a, connect between the outside line b.
The embodiment of the invention provides a kind of communication equipment, described communication equipment is provided with interface circuit, described interface circuit comprises transformer B1, wherein, the secondary winding interface unit 10 of described transformer B1, the elementary winding of described transformer B1 meet outside line a and meet outside line b, wherein, be connected with high-pass filtering device 30 between the described elementary winding c that meets outside line a and described transformer B1, be connected with high-pass filtering device 50 between the described elementary winding d that meets outside line b and described transformer B1; Described meet outside line a and connect be connected with protection device v1, protection device v2 between the outside line b, and between described protection device v1 and described protection device v2, an earth connection is arranged; Wherein, described protection device v1, protection device v2 are at described high-pass filtering device 30, high-pass filtering device 50 and meet outside line a, connect between the outside line b.
The embodiment of the invention provides the means of defence of device in a kind of communication equipment, comprising:
Interference common-mode signal in the signal is through being connected protection device v1 and the protection device v2 between tie-in line a and the tie-in line b, the voltage of described interference common-mode signal is higher than the voltage that described protection device v1 and described protection device v2 bear, described protection device v1 and described protection device v2 conducting, described interference common-mode signal is through connecting the earth connection between described protection device v1 and the protection device v2, and bleed off is to ground; Low-frequency interference signal in the signal is carried out Filtering Processing, and through after the Filtering Processing, the high-frequency signal in the signal passes through transformer.
As seen from the above; the means of defence of device in a kind of protective circuit of the foregoing description or a kind of communication equipment or a kind of communication equipment; by the high pass filter 30 between the primary side c that meets outside line a and transformer B1; connect high pass filter 50 between the primary side d of outside line b and transformer B1 with the low-frequency interference signal filtering; disturb common-mode signal by the protection device bleed off; thereby can be good at the device of transformer B1 primary side is protected, need not manual maintenance.
Description of drawings
Fig. 1 is a kind of balanced line signal port protective circuit figure in the prior art;
Fig. 2 is a kind of protective circuit embodiment one schematic diagram of the present invention;
Fig. 3 is a kind of protective circuit embodiment two schematic diagrames of the present invention;
Fig. 4 is the schematic equivalent circuit of the embodiment of the invention two;
Fig. 5 is the schematic diagram of a kind of protective circuit embodiment three of the present invention.
Embodiment
Referring to Fig. 2, the embodiment of the invention provides a kind of protective circuit, comprise transformer B1, wherein, the secondary winding interface unit 10 of described transformer B1, the elementary winding of described transformer B1 meet outside line a and meet outside line b, wherein, be connected with high-pass filtering device 30 between the described elementary winding c that meets outside line a and described transformer B1, be connected with high-pass filtering device 50 between the described elementary winding d that meets outside line b and described transformer B1; Described meet outside line a and connect be connected with protection device v1, protection device v2 between the outside line b, and between described protection device v1 and described protection device v2, an earth connection is arranged; Wherein, described protection device v1, protection device v2 are at described high-pass filtering device 30, high-pass filtering device 50 and meet outside line a, connect between the outside line b.
Wherein, this protection device v1 and protection device v2 series connection, and between this protection device v1 and protection device v2, an earth connection is arranged.This protection device v1 and protection device v2 are in high pass filter 30 and high pass filter 50 sides and meet outside line a and connect between the outside line b side.
Further; when the differential mode voltage endurance capability of the device 10 of transformer B1 secondary winding side is more weak; can described meet outside line a and connect be connected with protection device v3 between the outside line b; described protection device v3 is at described high-pass filtering device 30, high-pass filtering device 50 and meet outside line a, connect between the outside line b, and described protection device v3 is in parallel with described protection device v1 and protection device v2.
Wherein, described protection device (v1) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v2) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v3) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube.
Described high-pass filtering device 30 is an electric capacity, and described high-pass filtering device 50 is an electric capacity.
As seen from the above; a kind of protective circuit of the foregoing description; by the high pass filter 30 between the primary side c that meets outside line a and transformer B1; connect high pass filter 50 between the primary side d of outside line b and transformer B1 with the low-frequency interference signal filtering; disturb common-mode signal by the protection device bleed off; thereby can be good at the device of transformer B1 primary side is protected, need not manual maintenance.
Wherein, above-mentioned protective circuit can be balanced line signal port protective circuit.
Be that balanced line signal port protective circuit is set forth below with the protective circuit.
A kind of embodiment two of balanced line signal port protective circuit; see also Fig. 3, this balanced line signal port protective circuit comprises: transformer B1, wherein; the secondary winding of this transformer B1 connects internal components 10, and the elementary winding of this transformer B1 meets outside line a, meets outside line b.Wherein, this connects between the primary side c of outside line a and transformer B1 and is in series with electric capacity c1, and this connects between the primary side d of outside line b and transformer B1 and is in series with electric capacity c2.Be connected with TSS pipe v3 between the outside line b meeting outside line a and connect.Also be connected with TSS pipe v1, TSS pipe v2 between the outside line b meeting outside line a and connect, and between TSS pipe v1 and TSS pipe v2, be connected with an earth connection.Wherein, this TSS pipe v3 is in parallel with TSS pipe v1 and TSS pipe v2, and this TSS pipe v3, TSS pipe v1, TSS manage v2 at this electric capacity c1, electric capacity c2 and meet outside line a, connect between the outside line b.
Wherein, above-mentioned balanced line signal port protective circuit can be applied to the Access Network side apparatus, or user side equipment.
For the Access Network side; local side apparatus is as ONU (Optical Network Unit optical network unit); or DSLAM (Digital Subscriber Line Access Multiplexer digital subscriber line access multiplex) equipment, design has this balanced line signal port protective circuit on this local side apparatus PCB (Printed Circuit Board) plate.Meeting outside line a and meeting outside line b and be connected with terminal equipment in this balanced line signal port protective circuit by subscribers feeder.
For user side, as the Modem modulator-demodulator, design has this balanced line signal port protective circuit in this Modem modulator-demodulator.Meeting outside line a and meeting outside line b and be connected with local side apparatus in this balanced line signal port protective circuit by subscribers feeder.
When thunderbolt produces; the overvoltage of this lightning induction can act on the subscribers feeder; thereby tie-in line a and tie-in line b are produced common-mode voltage; when thunderbolt voltage surpasses the voltage that electric capacity c1, electric capacity c2 can bear; the thunderbolt common-mode voltage that tie-in line a is unnecessary will be by tie-in line a, TSS pipe v1 bleed off to ground; the thunderbolt common-mode voltage that tie-in line b is unnecessary is managed the v2 bleed off to ground by tie-in line b, TSS, thereby has protected the effect of transformer B1 primary side device effectively, need not manual maintenance.
When subscribers feeder occurring and touch power line failure, can produce voltage difference between two users' line, at this moment between tie-in line a and tie-in line b, produce differential mode voltage.When this differential mode voltage surpasses electric capacity c1 and electric capacity c2 withstand voltage; unnecessary differential mode voltage will be by tie-in line a; TSS pipe v3, TSS pipe v1 and TSS pipe v2; tie-in line b forms the loop; thereby with unnecessary voltage bleed off; thereby reach the effect of protection transformer B1 primary side device, need not manual maintenance.
When subscribers feeder power induction fault occurring; tie-in line a and tie-in line b produce common-mode voltage; when common-mode voltage surpasses the voltage that electric capacity c1, electric capacity c2 can bear; the common-mode voltage that tie-in line a is unnecessary will be by tie-in line a, TSS pipe v1 bleed off to ground; the common-mode voltage that tie-in line b is unnecessary is managed the v2 bleed off to ground by tie-in line b, TSS; thereby protected the effect of transformer B1 primary side device effectively, need not manual maintenance.
When subscribers feeder occurring and touch power line failure, can produce differential mode voltage between tie-in line a and the tie-in line b, see also Fig. 4, be the equivalent circuit diagram of generation differential mode voltage between tie-in line a among Fig. 3 and the tie-in line b.The direction of this difference mode signal is from meeting outside line a to meeting outside line b, or from meeting outside line b to meeting outside line a.From the circuit form of Fig. 2, electric capacity c1 and electric capacity c2 are series relationship, then meet outside line a and connect the withstand voltage withstand voltage sum that equals electric capacity c1 and electric capacity c2 substantially of electric capacity between the outside line b.Like this; for balanced line signal port protective circuit; the primary side coil of electric capacity c1, electric capacity c2 and transformer B1 has been formed the high-pass filtering circuit between tie-in line a, a tie-in line b; thereby effectively filtering surge, power frequency interference etc. are from the differential mode low-frequency disturbance of outside introducing, and can normally pass through high-frequency signal.
As seen from the above; a kind of balanced line signal port of present embodiment protective circuit is connecing in transformer B1 primary side between the primary side c of outside line a and transformer B1 and is being connected with electric capacity c1; between the primary side d that meets outside line b and transformer B120, be connected with electric capacity c2; this electric capacity c1, electric capacity c2 can protect the low pressure overvoltage, and the high pressure overvoltage is managed v1, TSS pipe v2, TSS pipe v3 bleed off by TSS.Thereby make high-frequency signal pass through electric capacity c1, electric capacity c2 normally passes through, thus effectively filtering low-frequency interference signal, guarantee the operate as normal of transformer B1 primary side device, need not manual maintenance.
Need to prove that a kind of balanced line signal port of present embodiment protective circuit is for the balanced line signal port of different rates, the transformer B1 that selects for use, electric capacity c1, electric capacity c2 are different.General adjustment of balance line signal port commonly used is that G.SHDSL (Single-pair High-speed Digital Subscriber Line) speed is that 2MHZ speed, ADSL speed are that 8MHZ, VDSL speed are 17MHZ.
Preferably, for the G.SHDSL signaling interface, the accepted value of the inductance of transformer B1, capacitor C 1, capacitor C 2 is respectively 3.18mH, 2uF, 2uF;
For the ADSL signaling interface, the accepted value of the inductance of transformer B1, capacitor C 1, capacitor C 2 is respectively 430uH, 66nF, 66nF;
For the VDSL signaling interface, the accepted value of the inductance of transformer B1, capacitor C 1, capacitor C 2 is respectively 420uH, 52nF, 52nF.
See also Fig. 5; the difference of a kind of balanced line signal port of the present invention protective circuit embodiment and the foregoing description is: the balanced line signal port protective circuit in the embodiment of the invention three; this meets a plurality of electric capacity c1 that connect between the primary side c of outside line a and transformer B1, and this connects between the primary side d of outside line b and transformer B1 and is in series with a plurality of electric capacity c2.
As seen from the above, at different application scenarioss, at least one electric capacity c1 can be as required connects between this meets the primary side c of outside line a and transformer B1, this meets at least one electric capacity c2 that connects between the primary side d of outside line b and transformer B1, thereby satisfy different application scenarioss, reached better protection effect.
Further, for the pipe of the TSS in the foregoing description two and the embodiment three balanced line signal port protective circuits, can replace with piezo-resistance, TVS (transient voltage suppressor) pipe or gas discharge tube.
Further, more intense when the differential mode voltage endurance capability of B1 level of transformer internal components 10, the pipe of the TSS in the balanced line signal port protective circuit among embodiment two and the embodiment three v3 can be removed.
Further, TSS can be managed v1, TSS pipe v2, TSS pipe v3 is integrated in the packaged device.
Further, the transformer B1 in Fig. 3 or Fig. 5, the electric capacity of between two coils of primary side of transformer B1, can connecting.
Further, the transformer B1 in Fig. 3 or Fig. 5 can be a coil in the primary side of transformer B1.
The embodiment of the invention provides a kind of communication equipment, described communication equipment is provided with interface circuit, described interface circuit comprises transformer B1, wherein, the secondary winding interface unit 10 of described transformer B1, the elementary winding of described transformer B1 meet outside line a and meet outside line b, wherein, be connected with high-pass filtering device 30 between the described elementary winding c that meets outside line a and described transformer B1, be connected with high-pass filtering device 50 between the described elementary winding d that meets outside line b and described transformer B1; Described meet outside line a and connect be connected with protection device v1, protection device v2 between the outside line b, and between described protection device v1 and described protection device v2, an earth connection is arranged; Wherein, described protection device v1, protection device v2 are at described high-pass filtering device 30, high-pass filtering device 50 and meet outside line a, connect between the outside line b.
As seen from the above; a kind of communication equipment of the foregoing description; by the high pass filter 30 between the primary side c that meets outside line a and transformer B1; connect high pass filter 50 between the primary side d of outside line b and transformer B1 with the low-frequency interference signal filtering; disturb common-mode signal by the protection device bleed off; thereby can be good at the device of transformer B1 primary side is protected, need not manual maintenance.
Further; when the differential mode voltage endurance capability of the device 10 of transformer B1 secondary winding side is more weak; can described meet outside line a and connect be connected with protection device v3 between the outside line b; described protection device v3 is at described high-pass filtering device 30, high-pass filtering device 50 and meet outside line a, connect between the outside line b, and described protection device v3 is in parallel with described protection device v1 and protection device v2.
Wherein, described protection device (v1) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v2) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v3) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube.
Further, the interface circuit in the above-mentioned communication equipment can be balanced line signal port protective circuit.
Need to prove, the interface circuit in a kind of communication equipment of present embodiment, the transformer B1 that selects for use, electric capacity c1, electric capacity c2 are different.General adjustment of balance line signal port commonly used is that G.SHDSL (Single-pair High-speed Digital Subscriber Line) speed is that 2MHZ speed, ADSL speed are that 8MHZ, VDSL speed are 17MHZ.
Preferably, for G.SHDSL, the accepted value of the inductance of transformer B1, capacitor C 1, capacitor C 2 is respectively 3.18mH, 2uF, 2uF;
For ADSL, the accepted value of the inductance of transformer B1, capacitor C 1, capacitor C 2 is respectively 430uH, 66nF, 66nF;
For VDSL, the accepted value of the inductance of transformer B1, capacitor C 1, capacitor C 2 is respectively 420uH, 52nF, 52nF.
Further, connect a plurality of electric capacity of to connect between the primary side c of outside line a and transformer B1, connect a plurality of electric capacity of to connect between the primary side d of outside line b and transformer B1.
Further, for the pipe of the TSS in the foregoing description communication equipment, can replace with piezo-resistance, TVS pipe or gas discharge tube.
Further, more intense when the differential mode voltage endurance capability of B1 level of transformer internal components 10, the pipe of the TSS in embodiment communication equipment v3 can be removed.
Further, TSS can be managed v1, TSS pipe v2, TSS pipe v3 is integrated in the packaged device.
Further, the transformer B1 in the embodiment communication equipment, the electric capacity of between two coils of primary side of transformer B1, can connecting.
Among the above-mentioned communication equipment embodiment, for the Access Network side, this communication equipment can be ONU (optical network unit) or DSLAM (digital subscriber line access multiplex) equipment, or ADSL (Asymmetrical Digital Subscriber Line) equipment or VDSL (very-high-bit-rate digital subscriber loop) equipment.User side equipment can be Modem (modulator-demodulator).
The embodiment of the invention provides the means of defence of device in a kind of communication equipment, comprising:
Interference common-mode signal in the signal is through being connected protection device v1 and the protection device v2 between tie-in line a and the tie-in line b, the voltage of described interference common-mode signal is higher than the voltage that described protection device v1 and described protection device v2 bear, described protection device v1 and described protection device v2 conducting, described interference common-mode signal is through connecting the earth connection between described protection device v1 and the protection device v2, and bleed off is to ground; Low-frequency interference signal in the signal is carried out Filtering Processing by high pass filter, and through after the Filtering Processing, the high-frequency signal in the signal passes through transformer.
Wherein, the high-frequency signal in the signal can be transferred to device in the communication equipment by transformer for the normal high-frequency signal in the signal by transformer.
Need to prove that above-mentioned signal comprises the high-frequency signal that disturbs common-mode signal, low-frequency interference signal and be transferred to transformer secondary output winding side device.
As seen from the above; the means of defence of device in a kind of communication equipment of the foregoing description by high pass filter filtering low-frequency interference signal, disturbs common-mode signal by the protection device bleed off; thereby can be good at the device of transformer B1 primary side is protected, need not manual maintenance.
Further; described means of defence also comprises: the differential mode interference signal in the signal is through being connected the protection device v3 between described tie-in line a and the described tie-in line b; described differential mode interference voltage of signals is higher than the voltage that described protection device v3 bears; described protection device v3 conducting, described difference mode signal is through described protection device v3 bleed off.
The high-frequency signal that this signal disturbs common-mode signal, low-frequency interference signal, differential mode interference signal and is transferred to transformer secondary output winding side device.
More than the means of defence of a kind of protective circuit of the embodiment of the invention, a kind of communication equipment and a kind of communication equipment is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; part in specific embodiments and applications all can change; in sum, the content of this specification embodiment should not be construed as limitation of the present invention.
Claims (16)
1, a kind of protective circuit, comprise transformer (B1), wherein, the secondary winding interface unit (10) of described transformer (B1), the elementary winding of described transformer (B1) meets outside line a and meets outside line b, it is characterized in that, be connected with high-pass filtering device (30) between the described elementary winding c that connects outside line a and described transformer (B1), be connected with high-pass filtering device (50) between the described elementary winding d that connects outside line b and described transformer (B1); Described meet outside line a and connect be connected with protection device (v1), protection device (v2) between the outside line b, and between described protection device (v1) and described protection device (v2), an earth connection is arranged; Wherein, described protection device (v1), protection device (v2) are positioned at described high-pass filtering device (30), high-pass filtering device (50) and meet outside line a, connect between the outside line b.
2, protective circuit according to claim 1; it is characterized in that; described connect outside line (a) and connect be connected with protection device (v3) between the outside line (b); described protection device (v3) is positioned at described high-pass filtering device (30), high-pass filtering device (50) and meets outside line a, connects between the outside line b, and described protection device (v3) is in parallel with described protection device (v1) and protection device (90) TSS pipe (v2).
3, protective circuit according to claim 2 is characterized in that, described protection device (v1), protection device (v2), protection device (v3) are integrated in the packaged device.
4, protective circuit according to claim 2 is characterized in that, described protection device (v1) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v2) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v3) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube.
5, protective circuit according to claim 1 is characterized in that, described high-pass filtering device (30) is electric capacity (c1), and described high-pass filtering device (50) is electric capacity (c2).
6, protective circuit according to claim 5 is characterized in that,
For the G.SHDSL signaling interface, the accepted value of the inductance of transformer (B1), electric capacity (c1), electric capacity (c2) is respectively 3.18mH, 2uF, 2uF; Or
For the ADSL signaling interface, the accepted value of the inductance of transformer (B1), electric capacity (c1), electric capacity (c2) is respectively 430uH, 66nF, 66nF; Or
For the VDSL signaling interface, the accepted value of the inductance of transformer (B1), electric capacity (c1), electric capacity (c2) is respectively 420uH, 52nF, 52nF.
7, protective circuit according to claim 1 is characterized in that, described protective circuit is a balanced line signal port protective circuit.
8, a kind of communication equipment, described communication equipment is provided with interface circuit, described interface circuit comprises transformer (B1), wherein, the secondary winding interface unit (10) of described transformer (B1), the elementary winding of described transformer (B1) meets outside line a and meets outside line b, it is characterized in that, be connected with high-pass filtering device (30) between the described elementary winding c that connects outside line a and described transformer (B1), be connected with high-pass filtering device (50) between the described elementary winding d that connects outside line b and described transformer (B1); Described meet outside line a and connect be connected with protection device (v1), protection device (v2) between the outside line b, and between described protection device (v1) and described protection device (v2), an earth connection is arranged; Wherein, described protection device (v1), protection device (v2) are positioned at described high-pass filtering device (30), high-pass filtering device (50) and meet outside line a, connect between the outside line b.
9, communication equipment according to claim 8; it is characterized in that; described connect outside line (a) and connect be connected with protection device (v3) between the outside line (b); described protection device (v3) is positioned at described high-pass filtering device (30), high-pass filtering device (50) and meets outside line a, connects between the outside line b, and described protection device (v3) is in parallel with described protection device (v1) and protection device (90) TSS pipe (v2).
10, communication equipment according to claim 9 is characterized in that, described protection device (v1) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v2) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube;
Described protection device (v3) is the TSS pipe, or piezo-resistance, or the TVS pipe, or gas discharge tube.
11, protective circuit according to claim 8 is characterized in that, described high-pass filtering device (30) is electric capacity (c1), and described high-pass filtering device (50) is electric capacity (c2).
12, communication equipment according to claim 8 is characterized in that, described communication equipment is Access Network side apparatus or user side equipment.
13, communication equipment according to claim 12 is characterized in that, described Access Network side apparatus is ONU optical network unit or DSLAM equipment or adsl equipment or VDSL equipment;
Described user side equipment is a modulator-demodulator.
14, communication equipment according to claim 8 is characterized in that, described interface circuit is a balanced line signal port protective circuit.
15, the means of defence of device in a kind of communication equipment is characterized in that, comprising:
Interference common-mode signal in the signal is through being connected protection device (v1) and the protection device (v2) between tie-in line a and the tie-in line b, the voltage of described interference common-mode signal is higher than the voltage that described protection device (v1) and described protection device (v2) are born, described protection device (v1) and described protection device (v2) conducting, described interference common-mode signal is through connecting the earth connection between described protection device (v1) and the protection device (v2), and bleed off is to ground; Low-frequency interference signal in the signal is carried out Filtering Processing by high pass filter, and through after the Filtering Processing, the high-frequency signal in the signal passes through transformer.
16, means of defence according to claim 15 is characterized in that, described means of defence also comprises:
Differential mode interference signal in the signal is through being connected the protection device (v3) between described tie-in line a and the described tie-in line b; described differential mode interference voltage of signals is higher than the voltage that described protection device (v3) is born; described protection device (v3) conducting, described difference mode signal is through described protection device (v3) bleed off.
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| CN200810066182A CN101546909A (en) | 2008-03-25 | 2008-03-25 | Protective circuit, communication equipment and method for protecting device in communication equipment |
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| CN200810066182A CN101546909A (en) | 2008-03-25 | 2008-03-25 | Protective circuit, communication equipment and method for protecting device in communication equipment |
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| WO2017032168A1 (en) * | 2015-08-27 | 2017-03-02 | 中兴通讯股份有限公司 | Protection circuit for interface with oscillation characteristic and method thereof |
| CN106961098A (en) * | 2016-01-08 | 2017-07-18 | 西门子公司 | A kind of surge protection circuit and surge protection method |
| CN112865837A (en) * | 2020-12-31 | 2021-05-28 | 深圳市普威技术有限公司 | Communication apparatus and communication system |
| CN112910484A (en) * | 2021-01-21 | 2021-06-04 | 睿高(广州)通信技术有限公司 | Lightning protection system for communication port of airborne power amplifier equipment |
| CN113382121A (en) * | 2020-03-09 | 2021-09-10 | 华为技术有限公司 | Single-board circuit, transformer and DSL client device |
| CN114123149A (en) * | 2021-11-26 | 2022-03-01 | 上海创远仪器技术股份有限公司 | Circuit structure for realizing enhanced port electrostatic protection |
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2008
- 2008-03-25 CN CN200810066182A patent/CN101546909A/en active Pending
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| CN103066584A (en) * | 2012-12-28 | 2013-04-24 | 李怀东 | Low-capacitance large-surge protective circuit |
| WO2017032168A1 (en) * | 2015-08-27 | 2017-03-02 | 中兴通讯股份有限公司 | Protection circuit for interface with oscillation characteristic and method thereof |
| CN106486992A (en) * | 2015-08-27 | 2017-03-08 | 中兴通讯股份有限公司 | A kind of interface protective circuit with oscillating characteristic and method |
| CN106961098A (en) * | 2016-01-08 | 2017-07-18 | 西门子公司 | A kind of surge protection circuit and surge protection method |
| CN108463933A (en) * | 2016-01-08 | 2018-08-28 | 西门子股份公司 | A kind of surge protection circuit and surge protection method |
| CN108463933B (en) * | 2016-01-08 | 2020-08-04 | 西门子股份公司 | Surge protection circuit and surge protection method |
| US11025053B2 (en) | 2016-01-08 | 2021-06-01 | Siemens Aktiengesellschaft | Surge protection circuit and surge protection method |
| CN113382121A (en) * | 2020-03-09 | 2021-09-10 | 华为技术有限公司 | Single-board circuit, transformer and DSL client device |
| CN113382121B (en) * | 2020-03-09 | 2023-07-07 | 华为技术有限公司 | Single board circuit, transformer and DSL client device |
| CN112865837A (en) * | 2020-12-31 | 2021-05-28 | 深圳市普威技术有限公司 | Communication apparatus and communication system |
| CN112910484A (en) * | 2021-01-21 | 2021-06-04 | 睿高(广州)通信技术有限公司 | Lightning protection system for communication port of airborne power amplifier equipment |
| CN114123149A (en) * | 2021-11-26 | 2022-03-01 | 上海创远仪器技术股份有限公司 | Circuit structure for realizing enhanced port electrostatic protection |
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