CN201774246U - Network connection common mode signal protection circuit - Google Patents
Network connection common mode signal protection circuit Download PDFInfo
- Publication number
- CN201774246U CN201774246U CN2010202518703U CN201020251870U CN201774246U CN 201774246 U CN201774246 U CN 201774246U CN 2010202518703 U CN2010202518703 U CN 2010202518703U CN 201020251870 U CN201020251870 U CN 201020251870U CN 201774246 U CN201774246 U CN 201774246U
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- electric capacity
- magnetic coil
- pressure cell
- centre cap
- protective circuit
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- Expired - Fee Related
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Abstract
A network connection common mode signal protection circuit comprises a first side, a second side, a power supply channel parallel to the first side, as well as a first signal channel, a second signal channel, a third signal channel and a fourth signal channel that are connected between the first side and the second side; each signal channel comprises a parallel transformer and a series transformer; each parallel transformer comprises a first magnetic coil and a second magnetic coil which are mutually coupled, wherein the two ends of the first magnetic coil are connected to the first side; each series transformer comprises a third magnetic coil and a fourth magnetic coil which are mutually coupled; the two ends of the second magnetic coils are respectively connected to one ends of the third coils and that of the fourth coils, and the other ends of the third coils and that of the fourth coils are connected to the second side; besides, the first magnetic coil of each signal channel is provided with a center tap, the first, the second, the third and the fourth central taps are connected to a first protection circuit after being connected in parallel, and the third and the fourth central taps are connected to the power supply channel after connected to a second protection circuit.
Description
[technical field]
The utility model is the network interface circuit that transmits power supply about a kind of, relates in particular to the common-mode signal protection of network interface circuit.
[background technology]
10/1000 network interface of conventional transmission power supply (POE RJ45 network interface) electric connector has four signal transmission passages, and two signalling channels are not transmitted power supply, two transmission power supplys.RJ45 network interface connector lightning protection specification requirement at present is more and more higher, usually the common mode test request reach 6kv or more than.Just because of the transmission power supply exists simultaneously with the signalling channel of not transmitting power supply, causing has uneven influence when the POE lightning protection is tested, and the common mode protection can reduce, and causes product not meet the requirements.
[utility model content]
Technical problem to be solved in the utility model provides a kind of common mode protection good network interface circuit.
For solving the problems of the technologies described above, the utility model provides a kind of network to connect the common-mode signal protective circuit.This network connects the common-mode signal protective circuit; first side and second side with input and output each other; be connected in first between these both sides; second; the 3rd; the 4th signalling channel; and and first side power channel arranged side by side; each signalling channel includes shunt transformer and series transformer; shunt transformer comprises first and second magnetic coil that intercouples; the two ends of first magnetic coil are connected in first side; series transformer comprises the 3rd and the 4th magnetic coil that intercouples; the two ends of second magnetic coil are connected to the 3rd; one end of the 4th coil; the 3rd; the other end of the 4th coil is connected in second side; wherein first magnetic coil of first signalling channel has first centre cap; first magnetic coil of secondary signal passage has second centre cap; first magnetic coil of the 3rd signalling channel has the 3rd centre cap; first magnetic coil of the 4th signalling channel has the 4th centre cap; described first; second; be connected to one first protective circuit, the 3rd after the 3rd and the 4th centre cap parallel connection; the 4th centre cap is connected to described power channel after being connected to one second protective circuit.
The the 3rd, the 4th centre cap of the present utility model and first, second centre cap are independent, the common mode protection that can not influence each other of its imbalance.The 3rd centre cap is connected in ground connection behind first pressure cell, and the 4th centre cap is connected in ground connection behind second pressure cell, and described first pressure cell, second pressure cell resistance when high pressure reduces, thereby the overvoltage protection to second side is provided.
[description of drawings]
Fig. 1 is the three-dimensional view with the electric connector that meets the utility model circuit.
Fig. 2 meets circuit diagram of the present utility model.
Fig. 3 is the stereogram of shown in Figure 2 first or second pressure cell (piezo-resistance).
Fig. 4 is the stereogram of the 3rd pressure cell shown in Figure 3 (thyristor).
[main element symbol description]
First magnetic coil, 31 first centre caps 311
Second centre cap 312 the 3rd centre cap 313
The 4th centre cap 314 centre caps 321,322,323,
324
Second magnetic coil 32 the 3rd magnetic coil 33
The 4th magnetic coil 34 the 5th magnetic coil 35
Shunt transformer 37 series transformers 39
First signalling channel, 41 secondary signal passages 42
The 3rd signalling channel 43 the 4th signalling channel 44
First electric capacity, 51 second electric capacity 52
The 3rd electric capacity 53 first pressure cells 61
Second pressure cell 62 the 3rd pressure cell 63
The first inductance chokes line, 67 second inductance chokes lines 69
The circle circle
[embodiment]
Consult Fig. 1, be depicted as a kind of network electric connector 100 of 2X6 interface 122, the circuit of its each interface 122 all meets the utility model.Figure 2 shows that one of them network interface circuit, it can be used for having the RJ45 electric connector of four signalling channels, and provides the common-mode signal overvoltage protection for each signalling channel.This circuit has first side (cable-side) and second side (physical side) of input and output each other, and being formed with first signalling channel 41, secondary signal passage 42, the 3rd signalling channel 43, the 4th signalling channel 44 that is connected between these both sides, each signalling channel includes shunt transformer 37 and series transformer 39.Shunt transformer 37 comprises that first magnetic coil 31 that intercouples and the two ends of second magnetic coil, 32, the first magnetic coils 31 are connected in first side.Series transformer 39 comprises the 3rd magnetic coil 33 and the 4th magnetic coil 34 that intercouples, the two ends of second magnetic coil 32 are connected to an end of the 3rd magnetic coil 33, the 4th magnetic coil 34, and the other end of the 3rd magnetic coil 33, the 4th magnetic coil 34 is connected in second side.Wherein first magnetic coil 31 of first signalling channel 41, secondary signal passage 42 has first centre cap 311, second centre cap 312 respectively, and first centre cap 311, second centre cap 312 all be connected to second side, so that power supply to be provided.First magnetic coil 31 that first magnetic coil 31 of the 3rd signalling channel 43 has the 3rd centre cap 313, the four signalling channels has the 4th centre cap 314.
Second magnetic coil 32 of described each signalling channel all has centre cap 321,322,323,324, and each centre cap is respectively connected the back parallel connections of one the 5th magnetic coil 35 together, is connected in the second side joint ground after connecting one the 4th electric capacity 54 again.The 5th magnetic coil 35 is coupled in each magnetic coil of the series transformer 39 of respective signal passage.This 5th magnetic coil 35 can improve the filter effect of each signalling channel.In addition, design as an alternative also can be coupled the magnetic coil of the series transformer 39 of all signalling channels.
Described circuit also comprises first electric capacity 51, first pressure cell 61, second pressure cell 62, second electric capacity 52, the 3rd electric capacity 53 and the 3rd pressure cell 63.
Aforementioned the 3rd centre cap 313 is connected with first side the 3rd electric capacity 53, the four centre caps 314 arranged side by side and is connected with second electric capacity 52 arranged side by side with first side.And the 3rd electric capacity 53, the four centre caps 314 are connected with the power channel arranged side by side with second side.Connect first electric capacity 51 and the 3rd pressure cell 63 back ground connection that are connected in parallel after second electric capacity 52,53 parallel connections of the 3rd electric capacity again.Wherein the 3rd pressure cell 63 is in the high pressure conditions conducting, to reduce the voltage of first electric capacity, 51 carryings.When described circuit was used for electric connector, described the 3rd pressure cell 63 was a thyristor, concrete structure such as Fig. 4.As matching Design, second capacitance is 1000 pico farads.
The 3rd centre cap 313 also connects the first pressure cell 61 back ground connection arranged side by side with the 3rd electric capacity 53; the 4th centre cap 314 connects the second pressure cell 62 back ground connection arranged side by side with second electric capacity 52; described first pressure cell 61, second pressure cell 62 resistance when high pressure reduces, thereby the overvoltage protection to second side is provided.The 3rd centre cap 313 be connected with the 3rd electric capacity 53 and the first pressure cell 61 first inductance choking-winding 67 arranged side by side after be connected to second side, the 4th centre cap 314 be connected with second electric capacity 52 and the second pressure cell 62 second inductance choking-winding 69 arranged side by side after be connected to second side.Aforementioned first pressure cell 61 and second pressure cell 62 can prevent that second electric capacity 52, the 3rd electric capacity 53 are broken down by high-voltage simultaneously.When described circuit was used for electric connector 100, for the reason of part spatial placement, first pressure cell 61 and second pressure cell 62 were piezo-resistance, concrete structure such as Fig. 3.Described first capacitance is 1000 pico farads, and second electric capacity 52, the 3rd electric capacity 53 capacitances are 0.022 microfarad.
Claims (10)
1. a network connects the common-mode signal protective circuit; first side and second side with input and output each other; be connected in first between these both sides; second; the 3rd; the 4th signalling channel; and and first side power channel arranged side by side; each signalling channel includes shunt transformer and series transformer; shunt transformer comprises first and second magnetic coil that intercouples; the two ends of first magnetic coil are connected in first side; series transformer comprises the 3rd and the 4th magnetic coil that intercouples; the two ends of second magnetic coil are connected to the 3rd; one end of the 4th coil; the 3rd; the other end of the 4th coil is connected in second side; wherein first magnetic coil of first signalling channel has first centre cap; first magnetic coil of secondary signal passage has second centre cap; first magnetic coil of the 3rd signalling channel has the 3rd centre cap; first magnetic coil of the 4th signalling channel has the 4th centre cap; it is characterized in that: described first; second; be connected to one first protective circuit, the 3rd after the 3rd and the 4th centre cap parallel connection; the 4th centre cap is connected to described power channel after being connected to one second protective circuit.
2. network as claimed in claim 1 connects the common-mode signal protective circuit; it is characterized in that: described first protective circuit comprises one first electric capacity and three pressure cell in parallel with first electric capacity, and second protective circuit comprises first, second pressure cell parallel with one another.
3. network as claimed in claim 2 connects the common-mode signal protective circuit, and it is characterized in that: described first, second pressure cell is a piezo-resistance, and the 3rd pressure cell is a thyristor.
4. network as claimed in claim 2 connects the common-mode signal protective circuit, and it is characterized in that: described the 3rd centre cap is connected with three electric capacity arranged side by side with first side, and the 4th centre cap is connected with second electric capacity arranged side by side with first side.
5. network as claimed in claim 4 connects the common-mode signal protective circuit, and it is characterized in that: described first pressure cell and the 3rd electric capacity are set up in parallel, and second pressure cell and the 4th electric capacity are set up in parallel.
6. network as claimed in claim 5 connects the common-mode signal protective circuit; it is characterized in that: ground connection behind first pressure cell that the 3rd centre cap connects and the 3rd electric capacity is arranged side by side; ground connection behind second pressure cell that the 4th centre cap connects and the 4th electric capacity is arranged side by side; described first, second pressure cell resistance when high pressure reduces, thereby the overvoltage protection to second side is provided.
7. network as claimed in claim 5 connects the common-mode signal protective circuit; it is characterized in that: the 3rd centre cap be connected with the 3rd electric capacity and first pressure cell first inductance coil arranged side by side after be connected to second side, the 4th centre cap be connected with second electric capacity and second pressure cell second inductance coil arranged side by side after be connected to second side.
8. network as claimed in claim 1 connects the common-mode signal protective circuit; it is characterized in that: described network connecting circuit also comprises three pressure cell in parallel with first electric capacity; the the 3rd, the 4th magnetic coil parallel connection of aforementioned the 3rd, the 4th signalling channel; connect ground connection behind first electric capacity be connected in parallel and the 3rd pressure cell again; wherein pressure cell is in the high pressure conditions conducting, to reduce the voltage of second electric capacity carrying.
9. network as claimed in claim 1 connects the common-mode signal protective circuit, and it is characterized in that: second capacitance is 1000 pico farads.
10. network as claimed in claim 1 connects the common-mode signal protective circuit; it is characterized in that: second magnetic coil of described each signalling channel all has centre cap; each centre cap is respectively connected behind the line chart parallel connection together, is connected in the second side joint ground after connecting one the 4th electric capacity again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202518703U CN201774246U (en) | 2010-07-08 | 2010-07-08 | Network connection common mode signal protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202518703U CN201774246U (en) | 2010-07-08 | 2010-07-08 | Network connection common mode signal protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774246U true CN201774246U (en) | 2011-03-23 |
Family
ID=43754083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202518703U Expired - Fee Related CN201774246U (en) | 2010-07-08 | 2010-07-08 | Network connection common mode signal protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201774246U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769439A (en) * | 2011-05-03 | 2012-11-07 | 富士康(昆山)电脑接插件有限公司 | Filter circuit applied to connector |
| CN102957148A (en) * | 2011-08-22 | 2013-03-06 | 富士康(昆山)电脑接插件有限公司 | Filter circuit |
| CN105470936A (en) * | 2014-08-15 | 2016-04-06 | 中国电信股份有限公司 | Network transformer lightning protection circuit for suppressing common mode surge |
| CN106330466A (en) * | 2015-07-10 | 2017-01-11 | 富士康(昆山)电脑接插件有限公司 | Ethernet powered end circuit and RJ45 connector applying same |
| CN106575922A (en) * | 2014-09-11 | 2017-04-19 | 株式会社村田制作所 | Power conversion device |
-
2010
- 2010-07-08 CN CN2010202518703U patent/CN201774246U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102769439A (en) * | 2011-05-03 | 2012-11-07 | 富士康(昆山)电脑接插件有限公司 | Filter circuit applied to connector |
| CN102957148A (en) * | 2011-08-22 | 2013-03-06 | 富士康(昆山)电脑接插件有限公司 | Filter circuit |
| CN102957148B (en) * | 2011-08-22 | 2015-05-06 | 富士康(昆山)电脑接插件有限公司 | Filter circuit |
| CN105470936A (en) * | 2014-08-15 | 2016-04-06 | 中国电信股份有限公司 | Network transformer lightning protection circuit for suppressing common mode surge |
| CN106575922A (en) * | 2014-09-11 | 2017-04-19 | 株式会社村田制作所 | Power conversion device |
| CN106575922B (en) * | 2014-09-11 | 2019-07-05 | 株式会社村田制作所 | Power-converting device |
| CN106330466A (en) * | 2015-07-10 | 2017-01-11 | 富士康(昆山)电脑接插件有限公司 | Ethernet powered end circuit and RJ45 connector applying same |
| CN106330466B (en) * | 2015-07-10 | 2019-05-17 | 富士康(昆山)电脑接插件有限公司 | Ethernet receiving end circuit and the RJ45 connector for applying it |
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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 |
Granted publication date: 20110323 Termination date: 20160708 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |