JPH02179015A - Ac line filter - Google Patents

Ac line filter

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Publication number
JPH02179015A
JPH02179015A JP33437688A JP33437688A JPH02179015A JP H02179015 A JPH02179015 A JP H02179015A JP 33437688 A JP33437688 A JP 33437688A JP 33437688 A JP33437688 A JP 33437688A JP H02179015 A JPH02179015 A JP H02179015A
Authority
JP
Japan
Prior art keywords
line filter
coils
bead
midpoint
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.)
Granted
Application number
JP33437688A
Other languages
Japanese (ja)
Other versions
JP2808626B2 (en
Inventor
Akio Nakatani
中谷　昭男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP63334376A priority Critical patent/JP2808626B2/en
Publication of JPH02179015A publication Critical patent/JPH02179015A/en
Application granted granted Critical
Publication of JP2808626B2 publication Critical patent/JP2808626B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To eliminate a disturbance in existence from a high to a low frequency with one line filter through the combination of plural coils and bead inductance by connecting a bypass capacitor to a midpoint between 1st and 2nd coils connecting to two AC power lines via the bead inductance. CONSTITUTION:An AC power line is connected between input terminals 8 and 8' of an AC line filter, 1st and 2nd coils 1 are connected to the terminals 8, 8', and noise prevention capacitors 3, 3' are connected to the midpoint of the 1st and 2nd coils 1 via bead inductances 2, 2'. Moreover, the connection midpoint of the noise prevention capacitors 3, 3' is brought into a ground level, output terminals 8, 8' of the line filter are connected to the inductors 2, 2' via a coil 4, the noise prevention capacitor 5 is connected to the output terminals 8, 8' and the disturbance in existence from a high to a low frequency is eliminated with one line filter through the combination of plural coils and bead inductance.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、電子機器回路に使用されるラインフィルタに
関するもので、複数のコイルに異なった周波数特性をも
たせ、ビーズインダクタンスと一体化し高域、低域ノイ
ズを除去出来るようにしたものである。[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a line filter used in electronic device circuits, in which multiple coils have different frequency characteristics and are integrated with bead inductance to provide high-frequency and low-frequency filters. It is designed to remove noise.

従来の技術 電子機器回路に使用される電源は電子機器内より発生し
たノイズが流出したり、外部より侵入したりする通路と
なる。この対策のため第３図に示すようにラインフィル
タ９、ＩＯを１個或いは複数個電源ラインに使用してい
る。ところで、最近デジタル機器化が進み、クロック周
波数等の高い周波数が使用されているが、この高周波の
ノイズは従来のラインフィルタでは除去することは出来
ない。BACKGROUND OF THE INVENTION A power supply used in a circuit of an electronic device serves as a path through which noise generated within the electronic device flows out or enters from the outside. As a countermeasure against this problem, one or more line filters 9 and IO are used in the power supply line as shown in FIG. Incidentally, with the recent progress in digital equipment, high frequencies such as clock frequencies are being used, but this high frequency noise cannot be removed by conventional line filters.

従って、高域ノイズは二次側で対策するため、プリント
基板の面積も広くなりコストアップとなっていた。Therefore, since high-frequency noise is taken care of on the secondary side, the area of the printed circuit board becomes large, leading to an increase in cost.

発明が解決しようとする課題 上記の様な手段を用いた場合、ＡＣラインフィルタ、以
外に高い周波数の妨害除去のために、２次側に特性の良
いフィルタ、インダクタンス、貫通コンデンサー等を用
いないと妨害を除去することは出来ないものである。Problems to be Solved by the Invention When using the above-mentioned means, in addition to the AC line filter, it is necessary to use a filter with good characteristics, an inductance, a feed-through capacitor, etc. on the secondary side to remove high frequency interference. Disturbances cannot be removed.

本発明は上記問題点を解決するものであり、更に小型化
を図ったＡＣラインフィルタを提供しようとするもので
ある。The present invention is intended to solve the above-mentioned problems and to provide an AC line filter that is further miniaturized.

課題を解決するための手段 上記課題を解決するため本発明の、ＡＣラインフィルタ
は、１つのフィルタの中に特性の異なったコイルを複数
個設け、更にビーズインダクタンスや、コンデンサーと
組合せ高い周波数から低い周波数までの妨害を排除する
ものである。Means for Solving the Problems In order to solve the above problems, the AC line filter of the present invention has a plurality of coils with different characteristics in one filter, and is further combined with bead inductance and a capacitor to reduce the frequency from high to low. This eliminates interference up to this frequency.

作用 本発明のＡＣラインフィルタは周波数特性の異なったコ
イルとビーズインダクタンスを組み合わせた構造により
高域と低域ノイズを同時に除去できる。Operation The AC line filter of the present invention can simultaneously remove high-frequency and low-frequency noises due to its structure that combines coils with different frequency characteristics and bead inductances.

実施例 以下図面により本発明の一実施例を説明する。Example An embodiment of the present invention will be described below with reference to the drawings.

第１図はその対策回路図を示す。第２図はコイルのボビ
ンの構造を示す図である。その対策回路の第１図よりコ
イル１、ビーズインダクタンス２．２゛、雑音防止コン
デンサ３．３”と組み合わせ、高域ノイズを除去する。Figure 1 shows a countermeasure circuit diagram. FIG. 2 is a diagram showing the structure of a coil bobbin. According to the countermeasure circuit shown in Fig. 1, it is combined with coil 1, bead inductance 2.2'', and noise prevention capacitor 3.3'' to eliminate high frequency noise.

更にコイル４、雑音防止コンデンサー５に依って低域ノ
イズを除去するビーズインダクタンス２．２“およびコ
ンデンサ３．３′はコイル１．４の中間点に挿入してい
る。そしてコンデンサ３．３“の他端はともに接地して
いる。Furthermore, a bead inductance 2.2" and a capacitor 3.3', which eliminate low-frequency noise using a coil 4 and a noise prevention capacitor 5, are inserted at the midpoint of the coil 1.4. Both ends are grounded.

以上のように異なった周波数特性をもった複数のコイル
１．４とビーズインダクタンス２．２゛と、更にコンデ
ンサ３．３゛を組み合わせ妨害排除能力の向上にしたＡ
Ｃラインフィルタを得る。As mentioned above, multiple coils 1.4 with different frequency characteristics, bead inductance 2.2゛, and a capacitor 3.3゛ are combined to improve the interference rejection ability.
Obtain a C line filter.

このＡＣラインフィルタにて５００　ｋ　Ｈｚ〜５０Ｍ
Ｈｚ帯域のノイズを排除することができる。500kHz~50M with this AC line filter
Noise in the Hz band can be eliminated.

なお、第１図、第２図において、６．６”は入力端子、
７．７′は中間端子、８．８°は出力端子、９はコイル
ボビンである。In addition, in Figures 1 and 2, 6.6" is the input terminal,
7.7' is an intermediate terminal, 8.8° is an output terminal, and 9 is a coil bobbin.

発明の詳細 な説明した様に本発明の如く、複数のコイルとビーズイ
ンダクタンスを組み合わせる構造により高域から低域の
妨害を１つのラインフィルタで除去することができ、そ
の実用的価値は極めて大なるものがある。As explained in detail, the structure of the present invention, which combines multiple coils and bead inductances, allows interference from high to low frequencies to be removed with a single line filter, and its practical value is extremely great. There is something.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の一実施例におけるＡＣラインフィル
タの回路図、第２図は同フィルタの構成を示す側面図、
第３図は従来のＡ、Ｃラインフィルタの回路図である。 １・・・・・・コイル、２．２’　・旧・・ビーズイン
ダクタンス、３，３゛　・・・・・′・ＭｆＦ［化コン
デンサ、４・旧・・コイル、５・旧・・雑音防止コンデ
ンサ。 代理人の氏名　弁理士　粟野重孝　はか１名／　、４−
Ｅ　、ｆ　７／ 鶴　２　図FIG. 1 is a circuit diagram of an AC line filter in an embodiment of the present invention, and FIG. 2 is a side view showing the configuration of the filter.
FIG. 3 is a circuit diagram of a conventional A and C line filter. 1...Coil, 2.2' ・Old...Bead inductance, 3,3゛...'...MfF capacitor, 4.Old...Coil, 5.Old...Noise prevention capacitor. Name of agent: Patent attorney Shigetaka Awano, 1 person/, 4-
E, f 7/ Crane 2 figure

Claims (1)

【特許請求の範囲】[Claims] 　２つの交流電源ラインに、おのおの第１、第２のコイ
ルを接続し、第１、第２のコイル中間点をビーズインダ
クタンスを介してバイパスコンデンサにて接地し、高域
並びに低域のノイズ成分を除去するようにした、ＡＣラ
インフィルタ。The first and second coils are connected to two AC power lines, and the midpoint between the first and second coils is grounded via a bead inductance with a bypass capacitor to eliminate high- and low-frequency noise components. AC line filter that removes it.
JP63334376A 1988-12-28 1988-12-28 AC line filter Expired - Lifetime JP2808626B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63334376A JP2808626B2 (en) 1988-12-28 1988-12-28 AC line filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63334376A JP2808626B2 (en) 1988-12-28 1988-12-28 AC line filter

Publications (2)

Publication Number Publication Date
JPH02179015A true JPH02179015A (en) 1990-07-12
JP2808626B2 JP2808626B2 (en) 1998-10-08

Family

ID=18276678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63334376A Expired - Lifetime JP2808626B2 (en) 1988-12-28 1988-12-28 AC line filter

Country Status (1)

Country Link
JP (1) JP2808626B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59173313U (en) * 1983-05-07 1984-11-19 株式会社村田製作所 Inductor for unbalanced noise prevention
JPS61140620U (en) * 1985-02-22 1986-08-30

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59173313U (en) * 1983-05-07 1984-11-19 株式会社村田製作所 Inductor for unbalanced noise prevention
JPS61140620U (en) * 1985-02-22 1986-08-30

Also Published As

Publication number Publication date
JP2808626B2 (en) 1998-10-08

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