JPS6029230Y2 - Noise filter for circuit board - Google Patents
Noise filter for circuit boardInfo
- Publication number
- JPS6029230Y2 JPS6029230Y2 JP3380U JP3380U JPS6029230Y2 JP S6029230 Y2 JPS6029230 Y2 JP S6029230Y2 JP 3380 U JP3380 U JP 3380U JP 3380 U JP3380 U JP 3380U JP S6029230 Y2 JPS6029230 Y2 JP S6029230Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit board
- noise filter
- signal line
- conductors
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004020 conductor Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Filters And Equalizers (AREA)
- Structure Of Printed Boards (AREA)
Description
【考案の詳細な説明】
本考案は回路基板に設けられた入出力信号用の数条の印
刷導体の、両外側導体外の位置で回路基板に設けた貫通
孔を通して１組の分割磁芯を表裏より接合してなる回路
基板用ノイズフィルタである。[Detailed description of the invention] The present invention is to insert a set of split magnetic cores through through holes provided on the circuit board at positions outside both outer conductors of several printed conductors for input/output signals provided on the circuit board. This is a noise filter for circuit boards that is bonded from the front and back.
ディジタル回路において外部からの不要電圧、電流のノ
イズで回路が誤動作することを防止するために、入出力
回路または電源回路などにインダクタンスを結合するこ
とがある。In digital circuits, inductance is sometimes coupled to input/output circuits or power supply circuits in order to prevent circuits from malfunctioning due to noise from external unnecessary voltages and currents.
従来インダクタンスの結合方法として、別に巻いたｎ次
巻きコモンモードチョークを回路基板上に実装したり、
または０本の信号線を環状磁心に巻いてインダクタンス
として回路に挿入することが行なわれていた。Conventional inductance coupling methods include mounting a separately wound nth-order common mode choke on the circuit board,
Alternatively, zero signal lines were wound around a ring-shaped magnetic core and inserted into a circuit as an inductance.
しかしこれらの方法はチョークや磁芯の回路基板への固
定または電気的接続が煩雑になり、取りつけ以後の信頼
性に欠ける点があった。However, these methods require complicated fixing or electrical connection of the choke or magnetic core to the circuit board, resulting in a lack of reliability after installation.
本考案は回路基板上に配線された数条の印刷導体の両外
側に貫通孔を設けて、この貫通孔を通して１組の分割磁
芯を接合して閉磁路を作るようにしたノイズフィルタに
関する。The present invention relates to a noise filter in which through holes are provided on both sides of several printed conductors wired on a circuit board, and a set of divided magnetic cores are joined through the through holes to create a closed magnetic path.
第１図、および第２図の本考案の実施例に示すように回
路基板２に印刷された数条の信号線導体５の両外側のた
とえば導体１から５までの外側の基板に貫通孔３を設け
、コの字形に分割された磁芯１および４の極１′および
４′を貫通孔３に通して突き合わせて、ばね、ねじを用
いたり、接着などの方法で接合する。As shown in the embodiment of the present invention shown in FIGS. 1 and 2, through holes 3 are formed in the substrate on both sides of several signal line conductors 5 printed on the circuit board 2, for example, on the outside of conductors 1 to 5. are provided, and the poles 1' and 4' of the U-shaped magnetic cores 1 and 4 are passed through the through hole 3 and butted against each other, and are joined using a spring, screw, adhesive, or other method.
このようにして第２図に示すように磁芯１と４とは回路
基板２および数条の信号線導体５を周回して閉磁路を作
る。In this way, as shown in FIG. 2, the magnetic cores 1 and 4 go around the circuit board 2 and several signal line conductors 5 to form a closed magnetic path.
また回路基板２上の導体５は回路側から１． ２． ３
． ４゜５、と端子側へ１’、２’、３’、４’、５’
とすると１と１′、・・・５と５′に流れる電流によっ
て生ずる磁界は磁芯１，４による閉磁路の方向と一致し
、磁芯１，４は印刷導体５を往復する電流から見てイン
ダクタンスとして作用することになる。Moreover, the conductor 5 on the circuit board 2 is 1. 2. 3
．． 4゜5, and 1', 2', 3', 4', 5' to the terminal side
Then, the magnetic field generated by the current flowing through 1 and 1', . This will act as an inductance.
したがってこれを等節回路であられすと第３図のように
印刷導体１−１’、２−２’、３−３’、４−４’、５
−５’の各々にインダクタンスｈ。Therefore, if this is an equinodal circuit, printed conductors 1-1', 2-2', 3-3', 4-4', 5
-5' each with an inductance h.
Ｌ２．Ｌｓ、Ｌ４．Ｌ５が挿入されたことと等価となり
、ノイズフィルタとして作用せしめることができる。L2. Ls, L4. This is equivalent to inserting L5, and can act as a noise filter.
以上述べたように従来の如く信号線に別のインダクタン
スを挿入すると、取りつけ固定が煩雑であるが本考案に
よればあらかじめ設計段階で回路基板に貫通孔を設けて
おけばよく、信号線に対して抵抗値のないインダクタン
ス回路が挿入されたことになり外部雑音を除去するフィ
ルタ効果がある。As mentioned above, if a separate inductance is inserted into the signal line as in the past, installation and fixing is complicated, but according to the present invention, it is only necessary to provide a through hole in the circuit board at the design stage, and the signal line Since an inductance circuit with no resistance value is inserted, there is a filter effect that removes external noise.
第１図は本考案のノイズフィルタの構戊分解斜視図、第
２図は本考案のノイズフィルタの実施例の斜視図、第３
図は本考案のノイズフィルタの等価回路図である。
図において１：磁芯、２：回路基板、
孔、４：磁芯、５：信号線導体である。
３：貫通Figure 1 is an exploded perspective view of the structure of the noise filter of the present invention, Figure 2 is a perspective view of an embodiment of the noise filter of the present invention, and Figure 3 is a perspective view of an embodiment of the noise filter of the present invention.
The figure is an equivalent circuit diagram of the noise filter of the present invention. In the figure, 1: magnetic core, 2: circuit board, hole, 4: magnetic core, 5: signal line conductor. 3: Penetration
Claims (1)
導体外の前記回路基板に設けた貫通孔を通して閉磁路を
形成するように１組の分割磁芯を接合してなる回路基板
用ノイズフィルタ。For circuit boards made by joining a set of split magnetic cores so as to form a closed magnetic path through through holes provided in the circuit board outside both outer conductors of several input/output signal line conductors provided on the circuit board. Noise filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3380U JPS6029230Y2 (en) | 1980-01-07 | 1980-01-07 | Noise filter for circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3380U JPS6029230Y2 (en) | 1980-01-07 | 1980-01-07 | Noise filter for circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56102128U JPS56102128U (en) | 1981-08-11 |
| JPS6029230Y2 true JPS6029230Y2 (en) | 1985-09-04 |
Family
ID=29596901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3380U Expired JPS6029230Y2 (en) | 1980-01-07 | 1980-01-07 | Noise filter for circuit board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6029230Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018073878A (en) * | 2016-10-25 | 2018-05-10 | 矢崎総業株式会社 | Board, and noise filter structure |
-
1980
- 1980-01-07 JP JP3380U patent/JPS6029230Y2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018073878A (en) * | 2016-10-25 | 2018-05-10 | 矢崎総業株式会社 | Board, and noise filter structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56102128U (en) | 1981-08-11 |
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