CN106160724A - Network interface circuit and apply the network connector module of this circuit - Google Patents
Network interface circuit and apply the network connector module of this circuit Download PDFInfo
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- CN106160724A CN106160724A CN201510156009.6A CN201510156009A CN106160724A CN 106160724 A CN106160724 A CN 106160724A CN 201510156009 A CN201510156009 A CN 201510156009A CN 106160724 A CN106160724 A CN 106160724A
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- autotransformer
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- mode choke
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- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 230000011664 signaling Effects 0.000 claims abstract description 23
- 230000008054 signal transmission Effects 0.000 claims abstract description 18
- 238000005516 engineering process Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
nullA kind of network interface circuit，It has netting twine side、Chip side、And the least one set signal transmission passage between netting twine side and chip side，Described one group of signal transmission passage includes the first signalling channel、Secondary signal passage、It is connected to first、The common mode choke of secondary signal passage and autotransformer、And it is connected on the capacitor on the first signalling channel and secondary signal passage，Described common mode choke has and is connected on first respectively、Two coils on secondary signal passage，Described autotransformer includes the first connection end being electrically connected at the first signalling channel、It is connected to the second connection end of secondary signal passage、And end and the centre cap of the second connection end electric connection it is connected with first，Described network interface circuit is additionally provided with earth terminal，Described centre cap is directly electrically connected to earth terminal，Such that it is able to improve lightning protection grade while reducing resistance and capacity cell cost.The network connector module of applicable network interface circuit discloses the most in the lump.
Description
[technical field]
The present invention is related to a kind of network interface circuit and applies the network connector module of this circuit, particularly relates to a kind of network interface circuit and applies the filter circuit of network connector module of this circuit.
[background technology]
Prior art related to the present invention, refer to Chinese CN103022818A patent application disclosed in 3 days April in 2013, it discloses a kind of network interface circuit, this network interface circuit has netting twine side (cable-side), chip side (physical side) and four groups of signal transmission passages between netting twine side and chip side.Often group signal transmission passage includes the first signalling channel, secondary signal passage, the common mode choke being connected between the first signalling channel and secondary signal passage and isolating transformer (Isolating
Transformer), one end centre cap of isolating transformer is connected with chip side, and the other end centre cap of isolating transformer is finally connected to ground by an electric capacity of connecting after four resistor coupled in parallel.Four resistor coupled in parallel and a capacitances in series are classical Bob Smith circuit (Bob-Smith
Circuit) design, but these capacitance resistance elements are when netting twine meets with thunderbolt, high surging (Surge) can be sent to isolating transformer from netting twine side through signal transmission passage, and the resistance being now connected with centre cap and electric capacity are more weak due to high-voltage resistance capability, time often to 2KV, just burnt out by height thunderbolt surging, thus cause high surging cannot connect to ground and coupled to the transformator secondary coil near chip side through the transformator primary coil near netting twine side, the chip (Chip) that such high surging is easily caused on mainboard burns out.
Chinese Patent No. CN101673613B, No. CN201323122U and U.S. Patent No. US8,861, No. 204B discloses the network connector module that can apply above-mentioned network interface circuit, and it can be RJ45 adapter or network transformer (Lan Transformer).
[summary of the invention]
The technical problem to be solved is: provide that a kind of filtering performance is good, lightning protection grade high, the network interface circuit of low cost and apply the network connector module of this circuit.
nullFor providing a kind of filtering performance good、Lightning protection grade is high、The network interface circuit of low cost，The present invention adopts the following technical scheme that a kind of network interface circuit，It has netting twine side、Chip side、And the least one set signal transmission passage between netting twine side and chip side，Described one group of signal transmission passage includes the first signalling channel、Secondary signal passage、It is connected to first、The common mode choke of secondary signal passage and autotransformer、And it is connected on the capacitor on the first signalling channel and secondary signal passage，Described common mode choke has and is connected on first respectively、Two coils on secondary signal passage，Described autotransformer includes the first connection end being electrically connected at the first signalling channel、It is connected to the second connection end of secondary signal passage、And end and the centre cap of the second connection end electric connection it is connected with first，Described network interface circuit is additionally provided with earth terminal，Described centre cap is directly electrically connected to earth terminal.
nullFor providing a kind of filtering performance good、Lightning protection grade is high、The network connector module of low cost，The present invention adopts the following technical scheme that a kind of network connector module，It includes circuit board、Common mode choke、Autotransformer、And capacitor，Described common mode choke、Autotransformer、And capacitor is mounted on circuit board，Described circuit board has the netting twine side for being electrically connected with netting twine、For being electrically connected with the chip side of mainboard chip、And it is connected to some conductive paths of netting twine side and chip side，It is provided with least one set signal transmission passage between described netting twine side and chip side，Described one group of signal transmission passage includes the first signalling channel、Secondary signal passage、It is connected to first、The common mode choke of secondary signal passage and autotransformer、And it is connected on the capacitor on the first signalling channel and secondary signal passage，Described common mode choke has and is connected on first respectively、Two coils on secondary signal passage，Described autotransformer includes the first connection end being electrically connected at the first signalling channel、It is connected to the second connection end of secondary signal passage、And end and the centre cap of the second connection end electric connection it is connected with first，Described network connector module also has earth terminal，Described centre cap is directly electrically connected to earth terminal.
Relative to prior art, the network interface circuit of the present invention is connected directly to earth terminal by the centre cap of autotransformer, the high surging that can be struck by lightning netting twine side directly connects to earth terminal, such that it is able to improve lightning protection grade while reducing resistance and capacity cell cost；Additionally, owing to being in series with capacitor between autotransformer and common mode choke, part low frequency noise can be filtered, and common mode choke can filtering common mode noise, common mode choke, capacitor, autotransformer cooperate to have obtained more preferable Electro Magnetic Compatibility (EMC) performance.
[accompanying drawing explanation]
Fig. 1 is the layout meeting inventive network interface circuit.
Fig. 2 is the front view of the network connector module of network interface circuit shown in application drawing 1.
Fig. 3 is the guiding path figure connecting autotransformer on circuit board shown in Fig. 2.
Fig. 4 is the rearview of the network connector module of network interface circuit shown in Fig. 2.
[primary clustering symbol description]
| Network interface circuit | 1 | Netting twine side | 101 |
| Chip side | 102 | Signal transmission passage | 11 |
| First signalling channel | 111 | Secondary signal passage | 112 |
| Common mode choke | 113 | Magnetic core | 1131 |
| Coil | 1132 | Autotransformer | 114 |
| Magnetic core | 1140 | First connects end | 1141 |
| Second connects end | 1142 | Centre cap | 1143 |
| Primary coil | 1144 | Secondary coil | 1145 |
| Capacitor | 115 | Earth terminal | 116 |
| Network connector module | 2 | Circuit board | 21 |
| Netting twine side | 211 | Chip side | 212 |
| Conducting strip | 213 | Earth terminal | 215 |
| Common mode choke | 22 | Autotransformer | 23 |
| Toroidal core | 231 | Coiling | 232 |
| The end of a thread | 2321 | Capacitor | 24 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
[detailed description of the invention]
As it is shown in figure 1, be a kind of network interface circuit 1 meeting the present invention, it has netting twine side 101, chip side 102 and connection the least one set signal transmission passage 11 between netting twine side 101 and chip side 102.Network interface circuit 1 shown in Fig. 1 includes the signal transmission passage 11 of four groups of identical settings, and this circuit is applicable to 1000Base-T and the network of above transfer rate, and the network of 10/100Base-T only needs the signal transmission passage of two groups of identical settings.
One group of signal transmission passage 11 includes the first signalling channel 111, secondary signal passage 112, the autotransformer 114 being connected in parallel between the first signalling channel 111 and secondary signal passage 112, common mode choke 113 and two capacitors 115 being connected on respectively on the first signalling channel 111 and secondary signal passage 112.Autotransformer 114 includes being connected to the first connection end 1141 of the first signalling channel 111, is connected to the second connection end 1142 of secondary signal passage 112 and being positioned at and is connected end 1141 and second with first and connects the centre cap 1143 of end 1142 electric connection, and described centre cap 1143 is directly electrically connected to earth terminal 116.
The network interface circuit 1 of the present invention is connected directly to earth terminal 116 by the centre cap 1143 of autotransformer 114, the high surging being struck by lightning in netting twine side 101 directly can be connected to earth terminal 116, such that it is able to improve lightning protection grade while reducing resistance and capacity cell cost, autotransformer 114 connects to ground (Line
To Ground) lightning protection grade can reach 15KV, and adjacent two passage (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 be at maximum up to 6KV, and adjacent two passage (Line
To Line) between lightning protection grade be at maximum up to 2KV.Additionally, owing to being in series with capacitor 115 between autotransformer 114 and common mode choke 113, capacitor 115 can filter part low frequency noise, and common mode choke 113 can filtering common mode noise, common mode choke 113, capacitor 115, autotransformer 114 cooperate to have obtained more preferable Electro Magnetic Compatibility (EMC) performance, not only show insertion loss (Insertion loss) and return loss (Return through test
Loss) performance has obtained great lifting, and the Conduction Interference CE (conduction in Electro Magnetic Compatibility
And radiation interference RE (radiation emission) is all improved emission).
Capacitor 115 is connected between common mode choke 113 and autotransformer 114.Autotransformer 114 is near netting twine side 101, and described common mode choke 113 is near chip side 102.Autotransformer 114 includes magnetic core 1140 and the primary coil 1144 being wound on same magnetic core and secondary coil 1145, and described primary coil 1144 and secondary coil 1145 are electrically connected with and in the intermediate formation centre cap 1143 of primary coil 1144 and secondary coil 1145.Common mode choke 113 includes magnetic core 1131 and two coupling coils 1132 being wound on same magnetic core, and each coil 1132 is connected on the first signalling channel 111 and secondary signal passage 112 respectively.
As shown in Figures 2 to 4, apply the network connector module 2 of above network interface circuit 1, network connector module 2 includes that circuit board 21, common mode choke 22, autotransformer 23 and capacitor 24, described common mode choke 22, autotransformer 23 and capacitor 24 are mounted on circuit board 21.Common mode choke 22 is corresponding to the common mode choke 113 in network interface circuit 1, and autotransformer 23 is corresponding to autotransformer 114, and capacitor 24 is corresponding to capacitor 115.Circuit board 21 has the netting twine side 211 for being electrically connected with netting twine, for the chip side 212 being electrically connected with mainboard chip and the some conductive paths being connected between netting twine side 211 and chip side 212.
Circuit board 21 is provided with some conducting strips 213, described autotransformer bag 23 includes toroidal core 231 and two conductive wrap 232 being set around on toroidal core, two the end of a thread 2321 of every coiling 232 respectively with conducting strip 213 physical connection, the part that two conductive wrap 232 are wound in magnetic core 231 mutually twists together, the setting and the part being positioned at outside magnetic core 231 is scattered.As shown in Figure 3, the end of a thread 2321 that the centre cap of autotransformer 23 connects two coilings 232 by the conductive path 214 on circuit board 21 is formed, and the centre cap of autotransformer 23 is directly electrically connected to earth terminal 215 by conductive path 214 on circuit board 21.
Comparing conventional isolating transformers needs four conductive wrap (enamel-covered wire) winding toroidal core (iron core) to form, the autotransformer 23 of the present invention uses two conductive wrap 232, decrease the quantity of conductive wrap, and when reducing coiling and reason lineman, while improve lightning protection grade and Electro Magnetic Compatibility, reduce manufacturing cost.Comparing conventional isolating transformers needs circuit board to arrange the next connection corresponding with isolating transformer of six conducting strips (pad), the autotransformer bag 23 of the present invention has only to four conducting strips (pad) and carrys out connect corresponding with autotransformer 23, the laterally arrangement conducting strip 213 of circuit board 21 reduces, so that the width of circuit board 21 is less.Compare surface soldered formula (SMD) autotransformer of I shape (or bar shaped) core structure, the autotransformer 23 of the ring core structure of the present invention has bigger inductance value, while saving conventional isolating transformers so that the inductance value of autotransformer disclosure satisfy that filtering requirements.
As shown in Figure 4, common mode choke 22 includes bar shaped magnetic core and two couplings coiling (not shown) being set around on same bar shaped magnetic core, and described common mode choke 22 is soldered on the conducting strip on circuit board 21 by surface soldered technology (SMT).
Capacitor 24 is surface soldered formula electric capacity, and described common mode choke 22, autotransformer 23 and capacitor 24 are electrically connected with by the conductive path on circuit board 21.Described autotransformer 23 is installed on the one side of circuit board 21, and described common mode choke 22 and capacitor 24 are installed on the another side of circuit board.Common mode choke 22 and autotransformer 23 use separation design, it is easy to the Automated winding of common mode choke 22 and autotransformer 23, the end of a thread 2321 of conductive wrap 232 on autotransformer 23 passes through stitch welding machine (without tin welding) automatically sweat soldering to conducting strip 213, common mode choke 22 and capacitor 24 use SMT technology to re-pack to circuit board 21, whole process automaticity is high, low cost of manufacture.
This network connector module 2 can be as network transformer (Lan Transformer) module, it is also possible to be installed in RJ45 socket connector as internal circuit board magnetic group.When it is network transformer (Lan Transformer) module, it is installed on the outside mainboard being provided with chip, and connected by outside mainboard and a passive RJ45 adapter (passive RJ45), its earth terminal 116 is the ground plane on outside mainboard.When it is as RJ45 socket connector a part of, its netting twine side is provided with RJ terminal, its chip side installation station foot (Footer pin), circuit board is installed on insulating body, and socket connector has the metal screen case as earth terminal 116 and is connected with the earth terminal 215 on internal circuit board.Metal screen case also ground plane with outside mainboard is electrically connected with.
These are only the part better embodiment of the present invention, the change of any equivalence that technical solution of the present invention is taked by those of ordinary skill in the art by reading description of the invention, the claim being the present invention is contained.
Claims (10)
1. a network interface circuit, it has netting twine side, chip side, and the least one set signal transmission passage between netting twine side and chip side, it is characterized in that: described one group of signal transmission passage includes the first signalling channel, secondary signal passage, it is connected to first, the common mode choke of secondary signal passage and autotransformer, and it is connected on the capacitor on the first signalling channel and secondary signal passage, described common mode choke has and is connected on first respectively, two coils on secondary signal passage, described autotransformer includes the first connection end being electrically connected at the first signalling channel, it is connected to the second connection end of secondary signal passage, and end and the centre cap of the second connection end electric connection it is connected with first, described network interface circuit is additionally provided with earth terminal, described centre cap is directly electrically connected to earth terminal.
2. network interface circuit as claimed in claim 1, it is characterised in that: described capacitor is electrically connected between common mode choke and autotransformer.
3. network interface circuit as claimed in claim 1, it is characterised in that: described autotransformer is near netting twine side, and described common mode choke is near chip side.
4. network interface circuit as claimed in claim 1, it is characterized in that: described autotransformer includes magnetic core and is wound in the primary coil on same magnetic core and secondary coil, described primary coil and secondary coil are electrically connected with and in the intermediate formation centre cap of primary coil and secondary coil.
5. network interface circuit as claimed in claim 1, it is characterised in that: two coils of described common mode choke are coupled on same magnetic core.
null6. a network connector module，It includes circuit board、Common mode choke、Autotransformer、And capacitor，It is characterized in that: described common mode choke、Autotransformer、And capacitor is mounted on circuit board，Described circuit board has the netting twine side for being electrically connected with netting twine、For being electrically connected with the chip side of mainboard chip、And it is connected to some conductive paths of netting twine side and chip side，It is provided with least one set signal transmission passage between described netting twine side and chip side，Described one group of signal transmission passage includes the first signalling channel、Secondary signal passage、It is connected to first、The common mode choke of secondary signal passage and autotransformer、And it is connected on the capacitor on the first signalling channel and secondary signal passage，Described common mode choke has and is connected on first respectively、Two coils on secondary signal passage，Described autotransformer includes the first connection end being electrically connected at the first signalling channel、It is connected to the second connection end of secondary signal passage、And end and the centre cap of the second connection end electric connection it is connected with first，Described network connector module also has earth terminal，Described centre cap is directly electrically connected to earth terminal.
7. network connector module as claimed in claim 6, it is characterized in that: described circuit board is provided with some conducting strips, described autotransformer includes toroidal core and two conductive wrap being set around on toroidal core, two the end of a thread of every coiling respectively with a conducting strip physical connection, the end of a thread that the centre cap of described autotransformer connects two coilings by the conductive path on circuit board is formed.
8. network connector module as claimed in claim 7, it is characterised in that: the part that described two conductive wrap are wound in magnetic core mutually twists together, and the part being positioned at outside magnetic core is scattered setting.
9. network connector module as claimed in claim 7, it is characterised in that: described common mode choke includes bar shaped magnetic core and the coiling being set around on bar shaped magnetic core, and described common mode choke is soldered on the conducting strip on circuit board by surface soldered technology.
10. network connector module as claimed in claim 9, it is characterized in that: described capacitor is surface soldered formula electric capacity, described common mode choke, autotransformer and capacitor are electrically connected with by the conductive path on circuit board, described autotransformer is installed on the one side of circuit board, and described common mode choke and capacitor are installed on the another side of circuit board.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156009.6A CN106160724A (en) | 2015-04-03 | 2015-04-03 | Network interface circuit and apply the network connector module of this 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 |
|---|---|---|---|
| CN201510156009.6A CN106160724A (en) | 2015-04-03 | 2015-04-03 | Network interface circuit and apply the network connector module of this circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106160724A true CN106160724A (en) | 2016-11-23 |
Family
ID=57338429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156009.6A Pending CN106160724A (en) | 2015-04-03 | 2015-04-03 | Network interface circuit and apply the network connector module of this circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106160724A (en) |
Cited By (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 |
| CN108737117A (en) * | 2018-04-13 | 2018-11-02 | 四川斐讯信息技术有限公司 | A kind of system that Ethernet is transmitted based on custom interface |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5971813A (en) * | 1998-04-01 | 1999-10-26 | Regal Electronics, Inc. | RJ-45 modular connector with microwave-transmission-line integrated signal conditioning for high speed networks |
| US20110243254A1 (en) * | 2010-04-06 | 2011-10-06 | Broadcom Corporation | Communications interface to differential-pair cabling |
| US20110304411A1 (en) * | 2010-06-10 | 2011-12-15 | Hon Hai Precision Industry Co., Ltd. | Magnetic interface circuit |
| CN203851110U (en) * | 2014-03-28 | 2014-09-24 | 弘邺科技有限公司 | Circuit for filtering noises in network signals |
| CN204179420U (en) * | 2014-08-06 | 2015-02-25 | 东莞建冠塑胶电子有限公司 | A kind of surge prevention operator guards for the integrated connector of RJ45 |
| CN204697044U (en) * | 2015-04-03 | 2015-10-07 | 富士康(昆山)电脑接插件有限公司 | Network interface circuit and apply the network connector module of this circuit |
-
2015
- 2015-04-03 CN CN201510156009.6A patent/CN106160724A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5971813A (en) * | 1998-04-01 | 1999-10-26 | Regal Electronics, Inc. | RJ-45 modular connector with microwave-transmission-line integrated signal conditioning for high speed networks |
| US20110243254A1 (en) * | 2010-04-06 | 2011-10-06 | Broadcom Corporation | Communications interface to differential-pair cabling |
| US20110304411A1 (en) * | 2010-06-10 | 2011-12-15 | Hon Hai Precision Industry Co., Ltd. | Magnetic interface circuit |
| CN203851110U (en) * | 2014-03-28 | 2014-09-24 | 弘邺科技有限公司 | Circuit for filtering noises in network signals |
| CN204179420U (en) * | 2014-08-06 | 2015-02-25 | 东莞建冠塑胶电子有限公司 | A kind of surge prevention operator guards for the integrated connector of RJ45 |
| CN204697044U (en) * | 2015-04-03 | 2015-10-07 | 富士康(昆山)电脑接插件有限公司 | Network interface circuit and apply the network connector module of this circuit |
Cited By (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 |
| CN108737117A (en) * | 2018-04-13 | 2018-11-02 | 四川斐讯信息技术有限公司 | A kind of system that Ethernet is transmitted based on custom interface |
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