CN106160697B - The network connector of network signal filter circuit and the application circuit - Google Patents
The network connector of network signal filter circuit and the application circuit Download PDFInfo
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- CN106160697B CN106160697B CN201510157540.5A CN201510157540A CN106160697B CN 106160697 B CN106160697 B CN 106160697B CN 201510157540 A CN201510157540 A CN 201510157540A CN 106160697 B CN106160697 B CN 106160697B
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- transformer
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- signal
- common mode
- mode choke
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Abstract
A kind of network signal filter circuit, it is with cable side, chip side, and first group of signal transmission passage between cable side and chip side and second group of signal transmission passage, first group of signal transmission passage is equipped with the first signal path, second signal channel, the first auto-transformer being connected in parallel between the first signal path and second signal channel, the second signal transmission channel is equipped with third signal path, fourth signal channel, the second auto-transformer being connected in parallel between third signal path and fourth signal channel, wherein described first auto-transformer and the second auto-transformer are wound on same magnetic core, to which magnetic core quantity is reduced, and coiling working hour is reduced, to at low cost.The network connector of application network signal filter circuit also discloses together.
Description
【Technical field】
The present invention is about a kind of network signal filter circuit and using the network connector of the circuit, more particularly to one kind
The filter circuit of the network connector of network signal filter circuit and the application circuit.
【Background technology】
The prior art related to the present invention please refers to China the CN103022818Ath disclosed in 3 days April in 2013 specially
Profit application, it discloses a kind of network signal filter circuit, which has cable side (cable-side), chip
Side (physical side) and four groups of signal transmission passages between cable side and chip side.Every group of signal transmission passage include
First signal path, second signal channel, the common mode choke being connected between the first signal path and second signal channel and
Isolating transformer (Isolating Transformer), one end centre cap of isolating transformer are connect with chip side, and isolation becomes
The other end centre cap of depressor is finally connected by a capacitance of connecting after four resistor coupled in parallel to ground.Four resistor coupled in parallel and one
Capacitance series connection is classical Bob Smith circuit (Bob-Smith circuit) design, but these capacitance resistance elements exist
When cable meets with lightning stroke, high surging (Surge) can be sent to isolating transformer from cable side by signal transmission passage, and this
When the resistance that is connect with centre cap and capacitance since high-voltage resistance capability is weaker, often to 2KV when, just burnt by height lightning stroke surging
It is broken, so as to cause high surging can not be connected to ground and passed through primary coil of the transformer close to cable side and be coupled to transformer and lean on
The secondary coil of nearly chip side, the chip (Chip) that such high surging is easy to cause on mainboard are burnt out.One isolating transformer pair
A common mode choke is answered, causes magnetic core quantity more, coiling working hour is long, and manufacturing cost is higher.
Chinese Patent No. CN101673613B, No. CN201323122U and U.S. Patent No. US8,861,204B
The network connector of above-mentioned network signal filter circuit can be applied by disclosing, and can be RJ45 connectors or network transformer
(Lan Transformer)。
【Invention content】
The technical problem to be solved by the present invention is to：A kind of network signal filter circuit at low cost is provided and applies the electricity
The network connector on road.
To provide a kind of network signal filter circuit at low cost, the present invention adopts the following technical scheme that：A kind of network letter
Number filter circuit, with cable side, chip side and first group of signal transmission passage between cable side and chip side
With second group of signal transmission passage, first group of signal transmission passage is equipped with the first signal path, second signal channel, simultaneously
The first auto-transformer being associated between the first signal path and second signal channel, the second signal transmission channel are equipped with
Third signal path, fourth signal channel, the second self coupling transformation being connected in parallel between third signal path and fourth signal channel
Device, wherein first auto-transformer and the second auto-transformer are wound on same magnetic core.
To provide a kind of network connector at low cost, the present invention adopts the following technical scheme that：A kind of network connector,
It is installed on the first auto-transformer on circuit board, the second auto-transformer, the first common mode choke, the second common mode including circuit board
Choke coil, first auto-transformer are respectively connected to the first common mode choke with the second auto-transformer and are gripped with the second common mode
Stream circle, wherein first auto-transformer and the second auto-transformer are wound on same magnetic core and form a coil windings.
Compared with the existing technology, the first auto-transformer and the second self coupling transformation in network signal filter circuit of the invention
Device is wound on same magnetic core, and to which magnetic core quantity is reduced, and coiling working hour is reduced, at low cost.
【Description of the drawings】
Fig. 1 is the line map for meeting inventive network signal filter circuit.
Fig. 2 is the front view of the network connector of network signal filter circuit shown in application drawing 1.
Fig. 3 is the guiding path figure that auto-transformer is connected on circuit board shown in Fig. 2.
Fig. 4 is the rearview of the network connector of network signal filter circuit shown in Fig. 2.
【Primary clustering symbol description】
| Network signal filter circuit | 1 | Cable side | 101 |
| Chip side | 102 | Signal transmission passage | 11、12、13、14 |
| First signal path | 111 | Second signal channel | 112 |
| First common mode choke | 113 | Magnetic core | 1131 |
| Coil | 1132 | Auto-transformer | 114 |
| First connecting pin | 1141 | Second connection end | 1142 |
| First centre cap | 1143 | First capacitor | 115 |
| Ground terminal | 116 | Third signal path | 121 |
| Fourth signal channel | 122 | Second common mode choke | 123 |
| Second auto-transformer | 124 | Second capacitor | 125 |
| Network connector | 2 | Circuit board | 21 |
| Cable side | 211 | Chip side | 212 |
| Conductive sheet | 213 | Ground terminal | 215 |
| Common mode choke | 22 | Auto-transformer | 23 |
| Toroidal core | 231 | Coiling | 232 |
| The end of a thread | 2321 | Capacitor | 24 |
Following specific implementation mode will be further illustrated the present invention in conjunction with above-mentioned attached drawing.
【Specific implementation mode】
As shown in Figure 1, to meet a kind of network signal filter circuit 1 of the present invention, with cable side 101, chip side
102 and at least two groups signal transmission passage 11,12 between cable side 101 and chip side 102.Network shown in Fig. 1 is believed
Number filter circuit 1 includes the signal transmission passage 11,12,13,14 of four groups of identical settings, this circuit is suitable for 1000Base-T
And the network of the above transmission rate, and the network of 10/100Base-T only needs the signal transmission passage of two groups of identical settings i.e.
It can.
At least two groups signal transmission passage 11,12 includes first group of signal transmission passage 11 and second group of signal transmission passage
12.First group of signal transmission passage 11 include the first signal path 111, second signal channel 112, the first common mode choke 113,
It the first auto-transformer 114 for being connected in parallel between the first signal path 111 and second signal channel 112 and is connected on respectively
Two the first capacitors 115 in first signal path 111 and second signal channel 112.Second group of signal transmission passage 12 with
First group of signal transmission passage 11 is arranged identical comprising third signal path 121, fourth signal channel 122, second are total
Mould choke coil 123, the second auto-transformer 124 being connected in parallel between third signal path 121 and fourth signal channel 122, with
And it is connected on two the second capacitors 125 in third signal path 121 and fourth signal channel 122 respectively.First self coupling becomes
Depressor 114 includes the first connecting pin (primary coil) 1141 for being connected to the first signal path 111, is connected to second signal channel
112 second connection end (secondary coil) 1142 and between the first connecting pin 1141 and second connection end 1142
One centre cap 1143, first centre cap 1143 are directly electrically connected to ground terminal 116.Second auto-transformer 124
Including being connected to the third connecting pin (primary coil) 1241 of third signal path 121, being connected to the of fourth signal channel 122
Four connecting pins (secondary coil) 1242 and the second center between third connecting pin 1241 and the 4th connecting pin 1242 are taken out
First 1243, second centre cap 1243 is connected directly to ground terminal 116.
Pass through the first auto-transformer 114 and the second auto-transformer 124 in the network signal filter circuit 1 of the present invention
Centre cap 1143,1243 is connected directly to ground terminal 116, and the high surging that cable side 101 can be struck by lightning directly connects
To ground terminal 116, so as to improve lightning protection grade, the first auto-transformer while reducing resistance and capacity cell cost
114 connect to the lightning protection grade of ground (Line to Ground) and can reach 15KV, and adjacent two channel (Line to Line)
Between lightning protection grade can reach 6KV, and the isolating transformer of traditional design be connected to (Line to Ground) lightning protection
Grade is at maximum up to 6KV, and the lightning protection grade between adjacent two channel (Line to Line) is at maximum up to 2KV.In addition, due to
The first capacitor 115,115 energy of the first capacitor are in series between the first auto-transformer 114 and the first common mode choke 113
Enough filter out part low frequency noise, and the first common mode choke 113 can filtering common mode noise, the first common mode choke 113, first
Capacitor 115, the first auto-transformer 114 cooperate to have obtained better Electro Magnetic Compatibility (EMC) performance, by test
Not only show that insertion loss (Insertion loss) and return loss (Return loss) performance have obtained great promotion,
And the Conduction Interference CE (conduction emission) in Electro Magnetic Compatibility and radiation interference RE (radiation
Emission it) is improved.
First auto-transformer 114 and the second auto-transformer 124 are wound on same magnetic core, and setting in this way reduces magnetic
Core quantity, and reduce coiling working hour so that production cost greatly reduces.
First auto-transformer 114 and the second auto-transformer 124 are close to cable-side 101, first common mode choke
113 and second common mode choke 123 close to chip side 102.
As shown in Figures 2 to 4, using the network connector 2 of the above network signal filter circuit 1, network connector 2 includes
The auto-transformer module 23 of common mode choke 22, two of circuit board 21, four and eight capacitors 24, the common mode chokes
Circle 22, auto-transformer module 23 and capacitor 24 are mounted on circuit board 21.Common mode choke 22 is believed corresponding to network
Common mode choke 113 in number filter circuit 1, auto-transformer module 23 correspond to the first auto-transformer 114 with second oneself
Coupling transformer 124, capacitor 24 correspond to the first capacitor 115 or the second capacitor 125.Circuit board 21 has for electrically connecting
It connects the cable side 211 of cable, the chip side 212 for being electrically connected mainboard chip and is connected to cable side 211 and chip side
Several conductive paths between 212.One auto-transformer module 23 and two common mode chokes 22 and two capacitors 24 are right
It should connect.
Circuit board 21 is equipped with several conductive sheets 213, and the auto-transformer packet 23 includes toroidal core 231 and is set around ring
Four conductive wraps 232 on shape magnetic core, two the end of a thread 2321 of every coiling 232 respectively with 213 physical connection of a conductive sheet, four
The part that root conductive wrap 232 is wound in magnetic core 231 mutually twists together, and the part outside the magnetic core 231 is scattered setting.
As shown in figures 1 and 3, the centre cap of auto-transformer module 23 connects two by the conductive path 214 on circuit board 21
The end of a thread 2321 of coiling 232 forms the first auto-transformer 114 and the second auto-transformer 124, and auto-transformer module 23
Centre cap ground terminal 215 is connected to by conductive path 214 on circuit board 21.
Four conductive wrap (enameled wire) winding toroidal cores (iron core) are needed to form, this hair compared to conventional isolating transformers
Bright auto-transformer module 23 forms the self coupling transformation in two channels using four conductive wraps 232 and a shape magnetic core 231
Device, reduces the quantity of conductive wrap and magnetic core, and reduces coiling and lineation working hour, improves lightning protection grade and electromagnetism is simultaneous
Manufacturing cost is reduced while capacitive.Need circuit board that 12 conductive sheets (pad) are set compared to two isolating transformers of tradition
It is correspondingly connected with two isolating transformers, auto-transformer packet 23 of the invention needs eight conductive sheets (pad) to come and self coupling
Transformer module 23 is correspondingly connected with, and the lateral arrangement conductive sheet 213 of circuit board 21 is reduced, so that the width of circuit board 21
Spend smaller.Compared to surface soldered formula (SMD) auto-transformer of I-shaped (or bar shaped) core structure, annular magnetic of the invention
The auto-transformer module 23 of cored structure has the inductance value of bigger, while saving conventional isolating transformers so that self coupling
The inductance value of transformer disclosure satisfy that filtering requirements.
As shown in figure 4, common mode choke 22 includes bar shaped magnetic core and the coiling being set around on bar shaped magnetic core, the common mode is gripped
Stream circle 22 is soldered to by surface soldered technology (SMT) on the conductive sheet on circuit board 21.
Capacitor 24 is surface soldered formula capacitance, the common mode choke 22, auto-transformer module 23 and capacitor
24 are electrically connected by the conductive path on circuit board 21.The auto-transformer module 23 is installed on the side of circuit board 21
Face, the common mode choke 22 are installed on the another side of circuit board with capacitor 24.Common mode choke 22 and auto-transformer
Module 23 uses separation design, is convenient for the Automated winding of common mode choke 22 and auto-transformer module 23, self coupling transformation
The end of a thread 2321 of conductive wrap 232 on device module 23 by stitch welding machine (no tin welding) automatically sweat soldering to leading
Electric piece 213, common mode choke 22 are re-packed using SMT modes to circuit board 21 with capacitor 24, whole process the degree of automation
Height, manufacturing cost are low.
The network connector 2 can be used as network transformer (Lan Transformer) module, can also be used as internal electricity
Road plate magnetism group is installed in RJ45 socket connectors.When it is network transformer (Lan Transformer) module, peace
Loaded on the external mainboard equipped with chip, and it is connect with a passive RJ45 connectors (passive RJ45) by external mainboard,
Ground terminal 116 is the ground plane on external mainboard.When its part as RJ45 socket connectors, cable side is equipped with
RJ terminals, chip side installation station foot is sub (Footer pin), and circuit board is installed on insulating body, and socket connector has
It is electrically connected as the ground terminal 215 on the metal screen case and internal circuit board of ground terminal 116.
It these are only the part better embodiment of the present invention, those of ordinary skill in the art are by reading explanation of the invention
Book and to any equivalent variation that technical solution of the present invention is taken, be that the claim of the present invention is covered.
Claims (9)
1. a kind of network signal filter circuit, with cable side, chip side and between cable side and chip side
One group of signal transmission passage and second group of signal transmission passage, first group of signal transmission passage are logical equipped with the first signal
Road, second signal channel, the first auto-transformer being connected in parallel between the first signal path and second signal channel, described second
Signal transmission passage is equipped with third signal path, fourth signal channel, is connected in parallel on third signal path and fourth signal channel
Between the second auto-transformer, it is characterised in that：First auto-transformer and the second auto-transformer are wound in same
On magnetic core, first group of signal transmission passage and second group of signal transmission passage are respectively equipped with the first common mode choke and second
Common mode choke is additionally provided between first auto-transformer and the first common mode choke and is connected on the first signal path respectively
Two the first capacitors on second signal channel, are additionally provided between second auto-transformer and the second common mode choke
Two the second capacitors being connected on respectively in third signal path and fourth signal channel.
2. network signal filter circuit as described in claim 1, it is characterised in that：First auto-transformer is equipped with connection
In the first signal path primary coil, be connected to the secondary coil in second signal channel and be set to primary coil and secondary
Also there is ground terminal, the centre cap directly electrically to connect for centre cap between grade coil, the network signal filter circuit
It is connected to ground terminal.
3. network signal filter circuit as described in claim 1, it is characterised in that：Second auto-transformer is equipped with connection
In third signal path primary coil, be connected to the secondary coil in fourth signal channel and be set to primary coil and secondary
Centre cap between grade coil, the centre cap are directly electrically connected to ground terminal.
4. network signal filter circuit as described in claim 1, it is characterised in that：First auto-transformer and second is certainly
Coupling transformer is close to cable-side, and first common mode choke and the second common mode choke are close to chip side.
5. a kind of network connector comprising circuit board is installed on the first auto-transformer on circuit board, the second self coupling transformation
Device, the first common mode choke, the second common mode choke, first auto-transformer are respectively connected to the second auto-transformer
First common mode choke and the second common mode choke, it is characterised in that：First auto-transformer and the second auto-transformer
Be wound on same magnetic core and form a coil windings, the first auto-transformer, the second auto-transformer, the first common mode choke,
Second common mode choke is formed with first group of signal transmission passage and second group of signal transmission passage, first group of signal transmission
Channel is equipped with the first signal path and second signal channel, and first auto-transformer is connected in parallel on the first signal path and the
Between binary signal channel, the second signal transmission channel be equipped with third signal path and fourth signal channel, described second
Auto-transformer is connected in parallel between third signal path and fourth signal channel, first group of signal transmission passage and second group
Signal transmission passage is respectively equipped with the first common mode choke and the second common mode choke, and first auto-transformer and first are total to
Two the first capacitors being connected on respectively in the first signal path and second signal channel are additionally provided between mould choke coil, it is described
It is additionally provided between second auto-transformer and the second common mode choke and is connected on third signal path and fourth signal channel respectively
On two the second capacitors.
6. network connector as claimed in claim 5, it is characterised in that：The circuit board is equipped with several conductive sheets and several
Conductive path, the coil windings include four conductive wraps, two the end of a thread of every coiling respectively with a conductive sheet physical connection,
The centre cap of first, second auto-transformer connects the end of a thread shape of two coilings by the conductive path on circuit board
At.
7. network connector as claimed in claim 6, it is characterised in that：First auto-transformer and the second self coupling transformation
The centre cap of device is directly electrically connected to ground terminal by the conductive path on circuit board.
8. network connector as claimed in claim 6, it is characterised in that：First auto-transformer and the second self coupling transformation
The part that four coilings of device are wound in magnetic core mutually twists together, and the part outside the magnetic core is scattered setting.
9. network connector as claimed in claim 5, it is characterised in that：First common mode choke and the second common mode chokes
The coiling that circle respectively includes bar shaped magnetic core and is set around on bar shaped magnetic core, first auto-transformer and the second auto-transformer
It is installed on the one side of circuit board, first common mode choke and the second common mode choke surface are installed on the another of circuit board
Side.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510157540.5A CN106160697B (en) | 2015-04-03 | 2015-04-03 | The network connector of network signal filter circuit and the application circuit |
| US15/088,147 US9985600B2 (en) | 2015-04-03 | 2016-04-01 | Printed circuit board assembly for filtering noise of network signal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510157540.5A CN106160697B (en) | 2015-04-03 | 2015-04-03 | The network connector of network signal filter circuit and the application circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106160697A CN106160697A (en) | 2016-11-23 |
| CN106160697B true CN106160697B (en) | 2018-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510157540.5A Expired - Fee Related CN106160697B (en) | 2015-04-03 | 2015-04-03 | The network connector of network signal filter circuit and the application circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106160697B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108737225A (en) * | 2018-04-13 | 2018-11-02 | 四川斐讯信息技术有限公司 | A kind of ethernet signal transmission interface circuit, method and the network equipment |
| CN108880610B (en) * | 2018-07-19 | 2023-11-10 | 深圳振华富电子有限公司 | Low-loss network information transmission device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2306671A1 (en) * | 2000-04-18 | 2001-10-18 | Luke Yu | Magnetic type harmonic filters for electrical systems |
| CN201160176Y (en) * | 2008-01-17 | 2008-12-03 | 富士康(昆山)电脑接插件有限公司 | Electric connector equipped with coil die set |
| CN201204329Y (en) * | 2008-04-02 | 2009-03-04 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN102769438A (en) * | 2011-05-03 | 2012-11-07 | 富士康(昆山)电脑接插件有限公司 | Filter circuit |
| CN204697025U (en) * | 2015-04-03 | 2015-10-07 | 富士康(昆山)电脑接插件有限公司 | Network signal filter circuit and apply the network connector of this circuit |
-
2015
- 2015-04-03 CN CN201510157540.5A patent/CN106160697B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2306671A1 (en) * | 2000-04-18 | 2001-10-18 | Luke Yu | Magnetic type harmonic filters for electrical systems |
| CN201160176Y (en) * | 2008-01-17 | 2008-12-03 | 富士康(昆山)电脑接插件有限公司 | Electric connector equipped with coil die set |
| CN201204329Y (en) * | 2008-04-02 | 2009-03-04 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN102769438A (en) * | 2011-05-03 | 2012-11-07 | 富士康(昆山)电脑接插件有限公司 | Filter circuit |
| CN204697025U (en) * | 2015-04-03 | 2015-10-07 | 富士康(昆山)电脑接插件有限公司 | Network signal filter circuit and apply the network connector of this circuit |
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| Publication number | Publication date |
|---|---|
| CN106160697A (en) | 2016-11-23 |
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