CN102222894A - Network connection common-mode signal protection circuit - Google Patents
Network connection common-mode signal protection circuit Download PDFInfo
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- CN102222894A CN102222894A CN2010101457641A CN201010145764A CN102222894A CN 102222894 A CN102222894 A CN 102222894A CN 2010101457641 A CN2010101457641 A CN 2010101457641A CN 201010145764 A CN201010145764 A CN 201010145764A CN 102222894 A CN102222894 A CN 102222894A
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Abstract
The invention discloses a network connection common-mode signal protection circuit, which is provided with a cable side and a physical side. A first signal channel, a second signal channel, a third signal channel and a fourth signal channel which are connected between the two sides are formed, wherein each signal channel comprises a parallel transformer and a series transformer; the parallel transformer comprises a first magnetic coil and a second magnetic coil which are coupled with each other; two ends of the first magnetic coil are connected to the cable side; the series transformer comprises a third magnetic coil and a fourth magnetic coil which are coupled with each other; two ends of the second magnetic coil are connected to one end of the third magnetic coil and one end of the fourth magnetic coil; and the other ends of the third and fourth magnetic coils are connected to the physical side; and two center taps of the first magnetic coils in the first and second signal channels and center taps of the third and fourth magnetic coils are independently grounded respectively.
Description
[technical field]
The invention relates to a kind of network interface circuit that transmits power supply, relate 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.
[summary of the invention]
Technical problem to be solved by this invention provides a kind of common mode protection good network interface circuit.
For solving the problems of the technologies described above, the invention provides a kind of network and connect the common-mode signal protective circuit.This protective circuit has first side and second side of input and output each other, and is formed with first, second, third, fourth signalling channel that is connected between these both sides.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 an end of the 3rd, the 4th coil, and the other end of the 3rd, the 4th coil is connected in second side.Wherein first magnetic coil of first, second signalling channel has first, second centre cap, and first, second centre cap is connected to second side.Described the 3rd, the 4th magnetic coil has the 3rd, the 4th centre cap, the 3rd, the 4th centre cap by with first, second centre cap circuit ground independently.
The the 3rd, the 4th centre cap of the present invention and first, second centre cap are independent, the common mode protection that can not influence each other of its imbalance.
[description of drawings]
Fig. 1 is the three-dimensional view with the electric connector that meets circuit of the present invention.
Fig. 2 is a circuit diagram according to the invention.
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
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 the 4th electric capacity 54
The 5th electric capacity 55 first pressure cells 61
The first inductance chokes line, 67 second inductance chokes lines 69
The circle circle
[embodiment]
Consult Fig. 1, be depicted as a kind of 2X6 and connect 122 network electric connector 100, the circuit of its each interface 122 all meets the present invention.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.Described the 3rd magnetic coil 33, the 4th magnetic coil 34 have respectively the 3rd centre cap 313, the 4th centre cap 314, the three centre caps 313, the 4th centre cap 314 by with first centre cap 311, second centre cap 312 circuit ground independently.First centre cap 311, second centre cap 312 and the 3rd centre cap 313, the 4th centre cap that connect second side were arranged in 314 minutes, avoid the imbalance of common mode signal, reduce the effect of overvoltage protection.
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 5th electric capacity 55 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 second electric capacity 52 and the 3rd pressure cell 63, aforementioned the 3rd centre cap 313,314 parallel connections of the 4th centre cap, connect second electric capacity 52 and the 3rd pressure cell 63 back ground connection that are connected in parallel again, wherein the 3rd pressure cell 63 is in the high pressure conditions conducting, to reduce the voltage of second electric capacity, 52 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.
Claims (10)
1. a network connects the common-mode signal protective circuit; first side and second side with input and output each other; and be formed with and be connected in first between these both sides; second; the 3rd; the 4th signalling channel; 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; first magnetic coil of secondary signal passage has first; second centre cap; and first; second centre cap is connected to second side; it is characterized in that: the described the 3rd; the 4th magnetic coil has the 3rd; the 4th centre cap, the 3rd; the 4th centre cap is by with first; second centre cap is circuit ground independently.
2. network as claimed in claim 1 connects the common-mode signal protective circuit, and it is characterized in that: first centre cap is connected with three electric capacity arranged side by side with second side, and second centre cap is connected with four electric capacity arranged side by side with second side.
3. network as claimed in claim 2 connects the common-mode signal protective circuit, it is characterized in that: three, connect ground connection behind one first electric capacity after the 4th electric capacity parallel connection.
4. network as claimed in claim 3 connects the common-mode signal protective circuit; it is characterized in that: ground connection behind first pressure cell that first centre cap connects and the 3rd electric capacity is arranged side by side; ground connection behind second pressure cell that second 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.
5. network as claimed in claim 4 connects the common-mode signal protective circuit; it is characterized in that: first 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, second centre cap be connected with the 4th electric capacity and second pressure cell second inductance coil arranged side by side after be connected to second side.
6. network as claimed in claim 5 connects the common-mode signal protective circuit, and it is characterized in that: described first capacitance is 1000 pico farads, and the 3rd, the 4th capacitance is 0.022 microfarad.
7. network as claimed in claim 1 connects the common-mode signal protective circuit; it is characterized in that: described network connecting circuit also comprises second electric capacity and the 3rd pressure cell; aforementioned the 3rd, the 4th magnetic coil parallel connection; connect ground connection behind second 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.
8. network as claimed in claim 7 connects the common-mode signal protective circuit, and it is characterized in that: described second pressure cell is a thyristor.
9. network as claimed in claim 7 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 coil parallel connection together, is connected in the second side joint ground after connecting one the 5th electric capacity again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010145764.1A CN102222894B (en) | 2010-04-13 | 2010-04-13 | Network connection common-mode signal protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010145764.1A CN102222894B (en) | 2010-04-13 | 2010-04-13 | Network connection common-mode signal protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102222894A true CN102222894A (en) | 2011-10-19 |
| CN102222894B CN102222894B (en) | 2015-05-06 |
Family
ID=44779355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010145764.1A Active CN102222894B (en) | 2010-04-13 | 2010-04-13 | Network connection common-mode signal protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102222894B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290681A (en) * | 2010-06-15 | 2011-12-21 | 富士康(昆山)电脑接插件有限公司 | Network electric connector |
| CN103457252A (en) * | 2012-06-01 | 2013-12-18 | 富士康(昆山)电脑接插件有限公司 | Common-mode signal protective circuit and electric connector with same |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200959605Y (en) * | 2006-05-31 | 2007-10-10 | 富士康(昆山)电脑接插件有限公司 | Interface circuit of electric connector |
| CN201207652Y (en) * | 2008-03-25 | 2009-03-11 | 富士康(昆山)电脑接插件有限公司 | Network interface circuit and electric connector having the circuit |
| CN201266942Y (en) * | 2008-07-24 | 2009-07-01 | 富士康(昆山)电脑接插件有限公司 | Network interface circuit |
| CN201278411Y (en) * | 2008-08-13 | 2009-07-22 | 中兴通讯股份有限公司 | Ethernet connector with lightning protection function |
-
2010
- 2010-04-13 CN CN201010145764.1A patent/CN102222894B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200959605Y (en) * | 2006-05-31 | 2007-10-10 | 富士康(昆山)电脑接插件有限公司 | Interface circuit of electric connector |
| CN201207652Y (en) * | 2008-03-25 | 2009-03-11 | 富士康(昆山)电脑接插件有限公司 | Network interface circuit and electric connector having the circuit |
| CN201266942Y (en) * | 2008-07-24 | 2009-07-01 | 富士康(昆山)电脑接插件有限公司 | Network interface circuit |
| CN201278411Y (en) * | 2008-08-13 | 2009-07-22 | 中兴通讯股份有限公司 | Ethernet connector with lightning protection function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290681A (en) * | 2010-06-15 | 2011-12-21 | 富士康(昆山)电脑接插件有限公司 | Network electric connector |
| CN103457252A (en) * | 2012-06-01 | 2013-12-18 | 富士康(昆山)电脑接插件有限公司 | Common-mode signal protective circuit and electric connector with same |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102222894B (en) | 2015-05-06 |
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