CN203851106U - Wave filter line - Google Patents
Wave filter line Download PDFInfo
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- CN203851106U CN203851106U CN201420142771.XU CN201420142771U CN203851106U CN 203851106 U CN203851106 U CN 203851106U CN 201420142771 U CN201420142771 U CN 201420142771U CN 203851106 U CN203851106 U CN 203851106U
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- 238000001914 filtration Methods 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 230000005764 inhibitory process Effects 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001629 suppression Effects 0.000 abstract 2
- 238000003754 machining Methods 0.000 abstract 1
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of wave filters, and particularly to a wave filter line. The wave filter line comprises the components of: a common-mode suppression unit, a low-frequency common-mode noise and differential-mode noise suppression filtering unit, and a signal coupling unit. SMD elements are adopted for the wave filter line totally. The wave filter line provided by the utility model has advantages of: standard elements, automatic production, stable quality, no restriction by human factors, low machining cost, small process variation and stable quality.
Description
Technical field
The utility model relates to wave filter technology field, relates in particular to a kind of filter circuit.
Background technology
LAN transformer is a kind of magnet assembly connecting between Ethernet transceiving chip and terminal device interface, plays signal transmission, impedance matching, waveform reparation, signal noise inhibition and high-voltage isolating effect at it between the two.The quality characteristic of lan network transformer directly affects the quality of the runnability of whole network system.
The factor restricted influences such as traditional LAN transformer wire route magnetic ring coil composition, has processing cost high, and process variation is large, and quality is unstable.
Summary of the invention
The purpose of this utility model is to provide a kind of filter circuit for the deficiencies in the prior art, has processing cost low, and process variation is little, the advantage of stay in grade.
For achieving the above object, the utility model adopts following technical scheme: a kind of filter circuit, it comprises that common mode inhibition unit, low frequency common-mode noise and differential mode noise suppress filtering unit, signal coupling unit, the output of described common mode inhibition unit connects the input of low frequency common-mode noise and differential mode noise inhibition filtering unit, and low frequency common-mode noise and differential mode noise suppress the input of the output connection signal coupling unit of filtering unit; Described common mode inhibition unit is made up of the co-mode coil being wound on same iron core, and described low frequency common-mode noise and differential mode noise suppress filtering unit by two inductance or be wound on the differential mode inductance on same iron core and the electric capacity that is parallel between circuit forms independently; Described signal coupling unit is made up of two inductance that are connected to the electric capacity of circuit and be parallel between circuit.
When the representative value of the co-mode coil of described common mode inhibition unit is 100MHz, impedance is 60 ~ 2K ohm.
The representative value that described low frequency common-mode noise and differential mode noise suppress the inductance of filtering unit is 0.1nH ~ 10uH, and the representative value of electric capacity is 0.1pF ~ 1nF.
The representative value of the electric capacity of described signal coupling unit is 80nF ~ 330nF, and the representative value of inductance is 350uH ~ 1mH.
The utility model beneficial effect is: a kind of filter circuit described in the utility model, it comprises that common mode inhibition unit, low frequency common-mode noise and differential mode noise suppress filtering unit, signal coupling unit, this filter circuit all adopts SMD part, there is standardization part and feature that can automated production, stay in grade and be not subject to the restriction of human factor, have processing cost low, process variation is little, the advantage of stay in grade.
Brief description of the drawings
Accompanying drawing 1 is line map of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described: as shown in Figure 1, a kind of filter circuit described in the utility model, it comprises that common mode inhibition unit 1, low frequency common-mode noise and differential mode noise suppress filtering unit 2, signal coupling unit 3, the output of described common mode inhibition unit 1 connects the input of low frequency common-mode noise and differential mode noise inhibition filtering unit 2, and low frequency common-mode noise and differential mode noise suppress the input of the output connection signal coupling unit 3 of filtering unit 2.Described common mode inhibition unit 1 is made up of the co-mode coil being wound on same iron core, and the input of this co-mode coil connects too net transceiving chip.Described low frequency common-mode noise and differential mode noise suppress filtering unit 2 by two inductance or be wound on the differential mode inductance on same iron core and the electric capacity that is parallel between circuit forms independently, and this electric capacity is arranged on output one side near common mode inhibition unit 1.Described signal coupling unit 3 is made up of two inductance that are connected to the electric capacity of circuit and be parallel between circuit, these two electric capacity are arranged on output one side near low frequency common-mode noise and differential mode noise inhibition filtering unit 2, and the output of signal coupling unit 3 is by cable connection terminal equipment.
The main filtering high frequency common mode noise in described common mode inhibition unit 1, when the representative value of its co-mode coil is 100MHz, impedance is 60 ~ 2K ohm.Described low frequency common-mode noise and differential mode noise suppress filtering unit 2 for suppressing to eliminate noise, and the representative value of its inductance is 0.1nH ~ 10uH, and the representative value of electric capacity is 0.1pF ~ 1nF.The function of described signal coupling unit 3 mainly contains the injury of isolated DC electricity to motherboard IC and signal the filtering low frequency signal of coupling upper frequency, the representative value of its electric capacity is 80nF ~ 330nF, the representative value of inductance is 350uH ~ 1mH, and the Main Function of inductance is for absorbing filtering low frequency signal.
As shown in Figure 1, a kind of filter circuit described in the utility model can comprise that multiple common mode inhibition unit 1, low frequency common-mode noise and differential mode noise suppress filtering unit 2, signal coupling unit 3, in figure, MX1+, MX1-, MX2+, MX2-, MX3+, MX3-, MX4+, MX4-are input, and TD1+, TD 1-, TD 2+, TD 2-, TD 3+, TD 3-, TD 4+, TD 4-are input.
A kind of filter circuit described in the utility model, high pass unit and low pass unit that its common mode inhibition unit 1, low frequency common-mode noise and differential mode noise suppress filtering unit 2 modules form the work band pass filter of LAN Filter, thereby realize the complete performance of Novel Filter.This filter circuit all adopts SMD part, has standardization part and feature that can automated production, and stay in grade and be not subject to the restriction of human factor has processing cost low, and process variation is little, the advantage of stay in grade.
The above is only preferred embodiments of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (4)
1. a filter circuit, it is characterized in that: it comprises that common mode inhibition unit (1), low frequency common-mode noise and differential mode noise suppress filtering unit (2), signal coupling unit (3), the output of described common mode inhibition unit (1) connects the input of low frequency common-mode noise and differential mode noise inhibition filtering unit (2), and low frequency common-mode noise and differential mode noise suppress the input of the output connection signal coupling unit (3) of filtering unit (2); Described common mode inhibition unit (1) is made up of the co-mode coil being wound on same iron core, and described low frequency common-mode noise and differential mode noise suppress filtering unit (2) by two inductance or be wound on the differential mode inductance on same iron core and the electric capacity that is parallel between circuit forms independently; Described signal coupling unit (3) is made up of two inductance that are connected to the electric capacity of circuit and be parallel between circuit.
2. a kind of filter circuit according to claim 1, is characterized in that: when the representative value of the co-mode coil of described common mode inhibition unit (1) is 100MHz, impedance is 60 ~ 2K ohm.
3. a kind of filter circuit according to claim 1, is characterized in that: the representative value that described low frequency common-mode noise and differential mode noise suppress the inductance of filtering unit (2) is 0.1nH ~ 10uH, and the representative value of electric capacity is 0.1pF ~ 1nF.
4. a kind of filter circuit according to claim 1, is characterized in that: the representative value of the electric capacity of described signal coupling unit (3) is 80nF ~ 330nF, and the representative value of inductance is 350uH ~ 1mH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420142771.XU CN203851106U (en) | 2014-03-27 | 2014-03-27 | Wave filter line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420142771.XU CN203851106U (en) | 2014-03-27 | 2014-03-27 | Wave filter line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203851106U true CN203851106U (en) | 2014-09-24 |
Family
ID=51564073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420142771.XU Expired - Lifetime CN203851106U (en) | 2014-03-27 | 2014-03-27 | Wave filter line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203851106U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901645A (en) * | 2015-05-20 | 2015-09-09 | 绵阳高新区经纬达科技有限公司 | Novel network filter circuit |
-
2014
- 2014-03-27 CN CN201420142771.XU patent/CN203851106U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901645A (en) * | 2015-05-20 | 2015-09-09 | 绵阳高新区经纬达科技有限公司 | Novel network filter circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Qishi town Zhenhua Industrial Zone 523000 Guangdong city of Dongguan province Dongguan mshine Technology Co. Ltd. Patentee after: Guangdong MISUN Technology Co.,Ltd. Address before: Qishi town Zhenhua Industrial Zone 523000 Guangdong city of Dongguan province Dongguan mshine Technology Co. Ltd. Patentee before: Dongguan Polytron Technologies Inc. Address after: Qishi town Zhenhua Industrial Zone 523000 Guangdong city of Dongguan province Dongguan mshine Technology Co. Ltd. Patentee after: Dongguan Polytron Technologies Inc. Address before: Qishi town Zhenhua Industrial Zone 523000 Guangdong city of Dongguan province Dongguan mshine Technology Co. Ltd. Patentee before: DONGGUAN MISUN TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |
|
| CX01 | Expiry of patent term |