CN102118108A - Electronic device, filtering module and method for reducing common mode noise - Google Patents
Electronic device, filtering module and method for reducing common mode noise Download PDFInfo
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- CN102118108A CN102118108A CN200910266097XA CN200910266097A CN102118108A CN 102118108 A CN102118108 A CN 102118108A CN 200910266097X A CN200910266097X A CN 200910266097XA CN 200910266097 A CN200910266097 A CN 200910266097A CN 102118108 A CN102118108 A CN 102118108A
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- connector
- filtering ring
- circuit board
- electrically connected
- mode noise
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Abstract
The invention discloses an electronic device, a filtering module and a method for reducing common mode noise, wherein the filtering module comprises a circuit board, a connector, a filtering ring and a plurality of coils, the connector and the filtering ring are both arranged on the circuit board; and the plurality of coils are wound on the filtering ring and electrically connected with the connector.
Description
Technical field
The present invention relates to a kind of filtration module, especially relate to a kind of in order to filter the filtration module of common mode noise.
Background technology
(Electromagnetic Interference EMI) is a kind of physical phenomenon that is full of at large arround daily life to electromagnetic interference.Generally speaking, can cause the noise of electromagnetic interference can be divided into differential mode noise (differential mode noise) and common mode noise (common mode noise).At present, every needs are used soft arranging wire (Flat Printed Cable, FPC; Flat Flexible Cable FFC) connects the electronic installation of electronic component, and the problem of common mode noise is all arranged.If the common mode noise is excessive, just can make electronic installation to test by EMI.
See also Fig. 1, Fig. 1 utilizes a filtering ring (core) 10 for background technology and filters the schematic diagram of common mode noise.As shown in Figure 1, general electronic installation (not illustrating in the drawings) all has a motherboard 12, and the chip 16 that motherboard 12 is provided with connector (connector) 14 and is used for carrying out signal processing, wherein connector 14 is electrically connected with chip 16 by the wiring of motherboard 12.Other electron component in the electronic installation then is electrically connected connector 14 by soft arranging wire 18.In order to filter the common mode noise, usually can be on soft arranging wire 18 the sheathed one filtering ring of making by oxygen iron compound (ferrite) 10, as shown in Figure 1.
Yet sheathed filtering ring 10 on soft arranging wire 18 when assembling, need headspace, and assembly program is also comparatively numerous and diverse.If the required soft arranging wire of using 18 of electronic installation is bigger, then filtering ring 10 is also just big, and not only the internal volume of electronic installation need increase, and soft arranging wire 18 is easy to come off from connector 14 because of the preponderance of filtering ring 10.In addition, the technology of also having powerful connections is added plastic cement and is penetrated coating behind sheathed filtering ring 10 on the soft arranging wire 18.Similarly, when assembling, also need headspace, if filtering ring 10 is not fixed, just filtering ring 10 can bump with other mechanism in the electronic installation.
Summary of the invention
Therefore, one of purpose of the present invention is to provide a kind of filtration module, in order to filter the common mode noise.
According to an embodiment, filtration module of the present invention comprises a circuit board, a connector, a filtering ring and a plurality of coil.Connector and filtering ring all are arranged on the circuit board.A plurality of coils are wrapped on the filtering ring, and are electrically connected with connector.
According to another embodiment, electronic installation of the present invention comprises a motherboard, a chip, a filtration module, an electronic component and a connecting line.Filtration module comprises a circuit board, a connector, a filtering ring and a plurality of coil.The circuit board of chip and filtration module all is arranged on the motherboard.Connector and filtering ring all are arranged on the circuit board, and connector is electrically connected with chip.A plurality of coils are wrapped on the filtering ring, and are electrically connected with connector.Connecting line is electrically connected connector and electronic component.
Filtration module of the present invention can pass through the surface adhering technology, and (Surface Mount Technology SMT) is arranged on the motherboard in the electronic installation, to solve above-mentioned problem about background technology.In addition, the present invention can select the less filtering ring of volume for use, and increases the number of turns of coil, increases common code impedance, makes global design have more elasticity.
Can be further understood by following detailed Description Of The Invention and appended accompanying drawing about the advantages and spirit of the present invention.
Description of drawings
Fig. 1 utilizes a filtering ring for background technology and filters the schematic diagram of common mode noise;
Fig. 2 is the outside drawing of electronic installation according to an embodiment of the invention;
Fig. 3 is the partial interior part schematic diagram of the electronic installation among Fig. 2;
Fig. 4 is the enlarged drawing of the filtration module among Fig. 3;
Fig. 5 is for reducing the flow chart of the method for common mode noise according to another embodiment of the present invention.
The main element symbol description
3 electronic installations, 10,304 filtering rings
12,32 motherboards, 14,302 connectors
16,34 chips, 18 soft arranging wires
30 filtration modules, 36 electronic components
38 connecting lines, 300 circuit boards
306 coils, 320 wirings
3020 pins
Embodiment
See also Fig. 2 to Fig. 4, Fig. 2 is the outside drawing of electronic installation 3 according to an embodiment of the invention, and Fig. 3 is the partial interior part schematic diagram of the electronic installation 3 among Fig. 2, and Fig. 4 is the enlarged drawing of the filtration module 30 among Fig. 3.In this embodiment, electronic installation 3 can be a flat display apparatus, for example LCD TV, plasma television, digital frame etc., but not as limit.As shown in Figure 3, electronic installation 3 comprises a filtration module 30, a motherboard 32, a chip 34, an electronic component 36 and a connecting line 38.When electronic installation 3 was flat display apparatus, electronic component 36 can be a display floater, but not as limit.In addition, connecting line 38 can be a soft arranging wire.Motherboard 32 has a wiring 320 at least, and chip 34 is arranged on the motherboard 32 and with wiring 320 and is electrically connected, and is used for carrying out signal processing.
As shown in Figure 3 and Figure 4, filtration module 30 comprises a circuit board 300, a connector 302, a filtering ring 304 and a plurality of coil 306.In this embodiment, filtering ring 304 can be made by the oxygen iron compound.Circuit board 300 is arranged on the motherboard 32, and connector 302 all is arranged on the circuit board 300 with filtering ring 304.Coil 306 is wrapped on the filtering ring 304, and is electrically connected with connector 302.In addition, connector 302 has a plurality of pins 3020, and each pin 3020 is electrically connected with one of them of coil 306 respectively.306 wirings 320 by motherboard 32 of coil are electrically connected with chip 34.38 of connecting lines are electrically connected the connector 302 and electronic component 36 on the filtration module 30.
Thus, through behind the filtering ring 304 of filtration module 30,36 common mode noise just can weaken from connecting line 38 to electronic component, makes electronic installation 3 to test by EMI smoothly at the common mode noise.In this embodiment, the number of turns that each coil 306 is wrapped on the filtering ring 304 is all identical, but not as limit.In addition, the present invention can be according to the signal output demand of reality, the coil of winding and holding wire equal number on single filtering ring 304, that is the present invention can utilize 304 couples one whole rows' of single filtering ring holding wires to carry out the filtration of common mode noise.
See also Fig. 5, Fig. 5 is for reducing the flow chart of the method for common mode noise according to another embodiment of the present invention.See also Fig. 2 to Fig. 4, cooperate above-mentioned electronic installation 3, the method for reduction common mode noise of the present invention comprises the following step:
Step S100: motherboard 32 is provided, comprises wiring 320, chip 34 and filtration module 30 on the motherboard 32 at least, wherein filtration module 30 includes circuit board 300, connector 302, filtering ring 304 and a plurality of coil 306; And
Step S102: electronic component 36 is provided, utilizes connecting line 38 to be connected with connector 302.
The action principle of said elements does not repeat them here as previously mentioned.
Be compared to background technology, the present invention can select the less filtering ring of volume for use, and increases the number of turns of coil, increases common code impedance, makes global design have more elasticity.Moreover filtration module of the present invention can be arranged on the motherboard in the electronic installation by the surface adhering technology, and is therefore not fragile, also is difficult for dropping.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (11)
1. filtration module comprises:
Circuit board;
Connector is arranged on this circuit board;
The filtering ring is arranged on this circuit board; And
A plurality of coils are wrapped on this filtering ring, and are electrically connected with this connector.
2. filtration module as claimed in claim 1, wherein this filtering ring is made by the oxygen iron compound.
3. filtration module as claimed in claim 1, wherein this connector has a plurality of pins, and each these a plurality of pin is electrically connected with one of them of this a plurality of coils respectively.
4. filtration module as claimed in claim 1, wherein the number of turns that is wrapped on this filtering ring of each these a plurality of coil is all identical.
5. electronic installation comprises:
Motherboard has a wiring at least;
Chip is arranged on this motherboard and with this wiring and is electrically connected;
Filtration module comprises:
Circuit board is arranged on this motherboard;
Connector is arranged on this circuit board;
The filtering ring is arranged on this circuit board; And
A plurality of coils are wrapped on this filtering ring, and are electrically connected with this connector, are electrically connected with this chip by this wiring simultaneously;
Electronic component; And
Connecting line is electrically connected this connector and this electronic component.
6. electronic installation as claimed in claim 5, wherein this filtering ring is made by the oxygen iron compound.
7. electronic installation as claimed in claim 5, wherein this connector has a plurality of pins, and each these a plurality of pin is electrically connected with one of them of this a plurality of coils respectively.
8. electronic installation as claimed in claim 5, wherein the number of turns that is wrapped on this filtering ring of each these a plurality of coil is all identical.
9. method that reduces the common mode noise comprises:
One motherboard is provided, comprises wiring, chip and filtration module on this motherboard at least, wherein this filtration module includes:
Circuit board is arranged on this motherboard;
Connector is arranged on this circuit board;
The filtering ring is arranged on this circuit board; And
A plurality of coils are wrapped on this filtering ring, and are electrically connected with this connector, are electrically connected with this chip by this wiring simultaneously; And
One electronic component is provided, utilizes a connecting line to be connected with this connector.
10. the method for reduction common mode noise as claimed in claim 9, wherein this filtering ring is made by the oxygen iron compound.
11. the method for reduction common mode noise as claimed in claim 9, wherein the number of turns that is wrapped on this filtering ring of each these a plurality of coil is all identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910266097XA CN102118108A (en) | 2009-12-31 | 2009-12-31 | Electronic device, filtering module and method for reducing common mode noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910266097XA CN102118108A (en) | 2009-12-31 | 2009-12-31 | Electronic device, filtering module and method for reducing common mode noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102118108A true CN102118108A (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910266097XA Pending CN102118108A (en) | 2009-12-31 | 2009-12-31 | Electronic device, filtering module and method for reducing common mode noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102118108A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202278A (en) * | 1995-11-22 | 1998-12-16 | 斯图尔脱联接体系股份有限公司 | Modular jack connetor |
| CN2800563Y (en) * | 2005-05-10 | 2006-07-26 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| US20080100400A1 (en) * | 2006-10-31 | 2008-05-01 | Lucas Donald J | Filter package |
-
2009
- 2009-12-31 CN CN200910266097XA patent/CN102118108A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202278A (en) * | 1995-11-22 | 1998-12-16 | 斯图尔脱联接体系股份有限公司 | Modular jack connetor |
| CN2800563Y (en) * | 2005-05-10 | 2006-07-26 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| US20080100400A1 (en) * | 2006-10-31 | 2008-05-01 | Lucas Donald J | Filter package |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110706 |