CN204696672U - Network surge prevention circuit and apply the network surge prevention device of this circuit - Google Patents
Network surge prevention circuit and apply the network surge prevention device of this circuit Download PDFInfo
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- CN204696672U CN204696672U CN201520198282.0U CN201520198282U CN204696672U CN 204696672 U CN204696672 U CN 204696672U CN 201520198282 U CN201520198282 U CN 201520198282U CN 204696672 U CN204696672 U CN 204696672U
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- network
- electrically connected
- surge prevention
- chip
- netting twine
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Abstract
A kind of network surge prevention circuit and a kind of network surge prevention device, network surge prevention circuit is electrically arranged between network chip and netting twine, described network surge prevention circuit comprises: in order to be electrically connected the netting twine side of netting twine, in order to be electrically connected the chip side of netting twine chip, and at least one signal transmission passage be arranged between netting twine side and chip side, described transmission channel is provided with the isolating transformer with primary side and secondary side, described primary side is electrically connected at netting twine side, described secondary side is electrically connected at chip side, the centre cap of wherein said primary side is directly electrically connected to earth terminal, thus breach resistance and electric capacity and bear the high bottleneck restriction broken through, considerably improve the lightning protection grade of network surge prevention circuit.The network surge prevention device of application network surge prevention circuit is also open in the lump.
Description
[technical field]
The utility model is about a kind of network surge prevention circuit and the network surge prevention device applying this circuit, and the centre cap ground connection particularly relating to isolating transformer in a kind of network surge prevention circuit is arranged.
[background technology]
Figure 2 shows a kind of web filter circuit of prior art.The prior art relevant to the utility model please refer to CN101673617A Chinese patent application disclosed in 17 days March in 2010, its accompanying drawing 12a ~ 12d discloses a kind of web filter circuit, its cable-side (CABLE SIDE), network chip side (PHY SIDE) and the some signal transmission passages be connected between cable-side and network chip side, each signal transmission passage comprises isolating transformer (Isolation transformer) and common mode choke (common mode choke).The primary side of isolating transformer is connected to netting twine side, is connected to chip side after the secondary side of isolating transformer is connected to common mode choke.The centre cap of the primary side of isolating transformer is by being connected to earth terminal by metal screen case after series connection one resistance and electric capacity (Bob-smith circuit).In addition, this patent application also discloses the unit connector utilizing the stacking USB of the RJ45 of this web filter circuit.Due to the setting of resistance and electric capacity, add the manufacturing cost of connector, and because resistance and electric capacity are when netting twine is subject to being struck by lightning, high surging (surge) can cause resistance and electric capacity to burn out, thus cause network connector normally to work, even cause burning out the network chip on outside motherboard.
In addition, web filter circuit can also be used for network transformer (LAN transformer), and such as patent documentation CN203562517U and US8,861,204B disclose such network transformer.
[utility model content]
Technical problem to be solved in the utility model is: provide a kind of network surge prevention circuit and apply the network surge prevention device of this circuit, its lightning protection grade is high.
For solving the problems of the technologies described above, the utility model provides a kind of network surge prevention circuit, it is electrically arranged between network chip and netting twine, described network surge prevention circuit comprises: in order to be electrically connected the netting twine side of netting twine, in order to be electrically connected the chip side of netting twine chip, and at least one signal transmission passage be arranged between netting twine side and chip side, described transmission channel is provided with the isolating transformer with primary side and secondary side, described primary side is electrically connected at netting twine side, described secondary side is electrically connected at chip side, the centre cap of wherein said primary side is directly electrically connected to earth terminal.
A kind of network surge prevention device, it is electrically arranged between network chip and netting twine, described network surge prevention device comprises: circuit board and by least one signal transmission passage on circuit board, described transmission channel is provided with the isolating transformer with primary side and secondary side, described primary side is in order to be electrically connected at netting twine, described secondary side is in order to be electrically connected at network chip, and the centre cap of wherein said primary side is directly electrically connected to earth terminal.
Hinge structure, the utility model breaks through usual understanding, the Bob Smith circuit (Bob smith circuit) of traditional design is omitted, the primary side of isolating transformer is connected directly to earth terminal, breach resistance and electric capacity and bear the high bottleneck restriction broken through, considerably improve network surge prevention circuit and apply the lightning protection grade of this circuit.
The utility model network surge prevention circuit also comprises following improvement further:
Further, described signal transmission passage is also provided with common mode choke, and one end of described common mode choke and the secondary side of isolating transformer are electrically connected, and the other end of described common mode choke and chip side are electrically connected.
Further, described common mode choke is three-wire type common mode choke, is connected to chip side after the centre cap of secondary side and common mode choke are electrically connected.
Further, described common mode choke is twin wire common mode choke, and the centre cap of secondary side is connected directly to earth terminal.
Further, described at least one signal transmission passage is the signalling channel of two identical settings or the signalling channel of four identical settings.
The utility model network surge prevention device also comprises following improvement further:
Further, described network surge prevention device is RJ45 network connector, described network surge prevention device comprises the metal shell of grounding connection, described circuit board to be arranged in metal screen case and to be electrically connected with metal shell, and the centre cap of described primary side is directly electrically connected to metal screen case by the conductive path on circuit board.
Further, described RJ45 network connector also comprises and docks terminal and the mounting terminal for being mounted to outside motherboard, on described network chip motherboard mounted externally for eight of contacting with netting twine.
Further, described network surge prevention device is network transformer, and described network chip is also installed on circuit board, and described circuit board is also provided with passive type RJ45 connector, and described passive type RJ45 connection device has the docking terminal for being connected with netting twine.
Further, described circuit board is also provided with common mode choke, one end of described common mode choke is electrically connected by the conductive path on circuit board and isolating transformer, and the other end of described common mode choke and network chip are electrically connected.
[accompanying drawing explanation]
Fig. 1 is the circuit diagram of the network surge prevention circuit meeting the utility model.
Fig. 2 is the circuit diagram of the web filter circuit of prior art.
[primary clustering symbol description]
| Netting twine side | 10 | Chip side | 11 |
| Signal transmission passage | 13 | Isolating transformer | 14 |
| Primary side | 141 | Centre cap | 1411 |
| Secondary side | 142 | Centre cap | 1421 |
| Common mode choke | 15 | Earth terminal | 16 |
Following embodiment will further illustrate the utility model in conjunction with above-mentioned accompanying drawing.
[embodiment]
As shown in Figure 1, for meeting a kind of network surge prevention circuit 100 of the present utility model, it is electrically arranged between network chip and netting twine.
Network surge prevention circuit 100 comprises: in order to be electrically connected netting twine netting twine side 10, in order to the chip side 11 that is electrically connected netting twine chip and at least one signal transmission passage 13 be arranged between netting twine side 10 and chip side 11.Described signal transmission passage 13 is provided with the isolating transformer 14 with primary side 141 and secondary side 142, described primary side 141 is electrically connected at netting twine side 10, described secondary side 142 is electrically connected at chip side 11, and the centre cap 1411 of described primary side 141 is directly electrically connected to earth terminal 16.
Signal transmission passage 13 is also provided with common mode choke 15, and one end of described common mode choke 15 and the secondary side 142 of isolating transformer 14 are electrically connected, and the other end and the chip side 11 of described common mode choke 15 are electrically connected.Described common mode choke 15 is three-wire type common mode choke or twin wire common mode choke, and common mode choke 15 shown in Fig. 2 is three-wire type common mode choke, is connected to chip side 11 after the centre cap 1421 of secondary side 142 and common mode choke 15 are electrically connected.When common mode choke 15 is twin wire common mode choke, the centre cap 1421 of secondary side 142 is connected directly to earth terminal 16.
When network surge prevention circuit 100 is for 10/100M Base-TX, 100, network surge prevention circuit needs the signal transmission passage of two identical settings; And when network surge prevention circuit 100 for 1000M Base-T and higher time, network surge prevention circuit 100 needs the signalling channel of four identical settings.Embodiment illustrated in fig. 2 is the signal transmission passage of four identical settings.
Network surge prevention circuit 100 can be applied to the band RJ45 network connector of filter element or the network surge prevention device of network transformer, this network surge prevention device is electrically arranged between network chip and netting twine, described network surge prevention device comprises: circuit board and by least one signal transmission passage on circuit board, described transmission channel is provided with the isolating transformer with primary side and secondary side, described primary side is in order to be electrically connected at netting twine, described secondary side is in order to be electrically connected at network chip, the centre cap of described primary side is directly electrically connected to earth terminal.Described circuit board is also provided with common mode choke, and one end of described common mode choke is electrically connected by the conductive path on circuit board and isolating transformer, and the other end of described common mode choke and network chip are electrically connected.
When network surge prevention device is RJ45 network connector, described network surge prevention device comprises the metal shell (being equivalent to earth terminal 16) of grounding connection, described circuit board to be arranged in metal screen case and to be electrically connected with metal shell, and the centre cap of described primary side is directly electrically connected to metal screen case by the conductive path on circuit board.Described RJ45 network connector also comprises and docks terminal and the mounting terminal for being mounted to outside motherboard, on described network chip motherboard mounted externally for eight of contacting with netting twine.
When network surge prevention device is network transformer, described network chip is also installed on circuit board, and described circuit board is also provided with passive type RJ45 connector, and described passive type RJ45 connection device has the docking terminal for being connected with netting twine.
The foregoing is only better embodiment of the present utility model, the change of those of ordinary skill in the art by reading the utility model specification to any equivalence that technical solutions of the utility model are taked, is claim of the present utility model and contains.
Claims (10)
1. a network surge prevention circuit, it is electrically arranged between network chip and netting twine, described network surge prevention circuit comprises: in order to be electrically connected netting twine netting twine side, in order to the chip side that is electrically connected netting twine chip and at least one signal transmission passage be arranged between netting twine side and chip side, described transmission channel is provided with the isolating transformer with primary side and secondary side, described primary side is electrically connected at netting twine side, described secondary side is electrically connected at chip side, it is characterized in that: the centre cap of described primary side is directly electrically connected to earth terminal.
2. network surge prevention circuit as claimed in claim 1, it is characterized in that: described signal transmission passage is also provided with common mode choke, one end of described common mode choke and the secondary side of isolating transformer are electrically connected, and the other end of described common mode choke and chip side are electrically connected.
3. network surge prevention circuit as claimed in claim 2, is characterized in that: described common mode choke is three-wire type common mode choke, is connected to chip side after the centre cap of secondary side and common mode choke are electrically connected.
4. network surge prevention circuit as claimed in claim 2, is characterized in that: described common mode choke is twin wire common mode choke, and the centre cap of secondary side is connected directly to earth terminal.
5. network surge prevention circuit as claimed in claim 1, is characterized in that: described at least one signal transmission passage is the signalling channel of two identical settings or the signalling channel of four identical settings.
6. a network surge prevention device, it is electrically arranged between network chip and netting twine, described network surge prevention device comprises: circuit board and by least one signal transmission passage on circuit board, described transmission channel is provided with the isolating transformer with primary side and secondary side, described primary side is in order to be electrically connected at netting twine, described secondary side, in order to be electrically connected at network chip, is characterized in that: the centre cap of described primary side is directly electrically connected to earth terminal.
7. network surge prevention device as claimed in claim 6, it is characterized in that: described network surge prevention device is RJ45 network connector, described network surge prevention device comprises the metal shell of grounding connection, described circuit board to be arranged in metal screen case and to be electrically connected with metal shell, and the centre cap of described primary side is directly electrically connected to metal screen case by the conductive path on circuit board.
8. network surge prevention device as claimed in claim 7, it is characterized in that: described RJ45 network connector also comprises and docks terminal and the mounting terminal for being mounted to outside motherboard, on described network chip motherboard mounted externally for eight of contacting with netting twine.
9. network surge prevention device as claimed in claim 6, it is characterized in that: described network surge prevention device is network transformer, described network chip is also installed on circuit board, described circuit board is also provided with passive type RJ45 connector, and described passive type RJ45 connection device has the docking terminal for being connected with netting twine.
10. network surge prevention device as claimed in claim 6, it is characterized in that: described circuit board is also provided with common mode choke, one end of described common mode choke is electrically connected by the conductive path on circuit board and isolating transformer, and the other end of described common mode choke and network chip are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520198282.0U CN204696672U (en) | 2015-04-03 | 2015-04-03 | Network surge prevention circuit and apply the network surge prevention device of this circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520198282.0U CN204696672U (en) | 2015-04-03 | 2015-04-03 | Network surge prevention circuit and apply the network surge prevention device of this circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204696672U true CN204696672U (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520198282.0U Expired - Fee Related CN204696672U (en) | 2015-04-03 | 2015-04-03 | Network surge prevention circuit and apply the network surge prevention device of this circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204696672U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105897212A (en) * | 2015-12-08 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Electromagnetic interference suppression method and device |
-
2015
- 2015-04-03 CN CN201520198282.0U patent/CN204696672U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105897212A (en) * | 2015-12-08 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Electromagnetic interference suppression method and device |
| WO2017096806A1 (en) * | 2015-12-08 | 2017-06-15 | 乐视控股（北京）有限公司 | Method and apparatus for suppressing electromagnetic interference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20160403 |