JPS6090921U - Circuit to prevent interference waves from entering telephones - Google Patents
Circuit to prevent interference waves from entering telephonesInfo
- Publication number
- JPS6090921U JPS6090921U JP11868283U JP11868283U JPS6090921U JP S6090921 U JPS6090921 U JP S6090921U JP 11868283 U JP11868283 U JP 11868283U JP 11868283 U JP11868283 U JP 11868283U JP S6090921 U JPS6090921 U JP S6090921U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- entering
- prevent interference
- interference waves
- telephones
- 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
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に用いるコモンモードチョークコイルの
原理を説明するための図、第２図は電話線に挿入したコ
モンモードチョークコイルの作用を説明するための図、
第３図は電話線にコモンモードチョークコイルを挿入し
た場合の等価回路を示す図、第４図は透磁率μ’ ＝
２０００の環状フェライトコアに単層巻きした場合の巻
回数を変数とするインピーダンスの周波数特性図、第５
図は第４図におけるコアに３通りの方法で巻線を施した
場合及び巻回数を変化した場合（破線）のコモンモード
チョークコイルのインピーダンスの周波数特性図、第６
図は本考案の一実施例による電話機への妨害波の混入防
止回路を示した回路図である。
１．２・・・・・・巻線、３・・・・・・磁性体、４・
・・・・・負荷、５・・・・・・可変インダクタンス、
６・・・・・・可変容量、ｅｌ・・・・・・妨害源電圧
、Ｚ、・・・・・・妨害波インピーダンス、Ｚｆ・・・
・・・フィルタのインピーダンス、Ｚｌ・・・・・・電
話機インピーダンス。Figure 1 is a diagram for explaining the principle of the common mode choke coil used in the present invention, Figure 2 is a diagram for explaining the action of the common mode choke coil inserted into a telephone line,
Figure 3 shows the equivalent circuit when a common mode choke coil is inserted into the telephone line, and Figure 4 shows the magnetic permeability μ' =
5th frequency characteristic diagram of impedance with the number of turns as a variable when winding a single layer around a 2000 annular ferrite core
The figure shows the impedance frequency characteristic diagram of the common mode choke coil when the core is wound in three ways in Figure 4 and when the number of windings is changed (broken line).
The figure is a circuit diagram showing a circuit for preventing interference waves from entering a telephone according to an embodiment of the present invention. 1.2... Winding wire, 3... Magnetic material, 4...
...Load, 5...Variable inductance,
6...variable capacitance, el...interference source voltage, Z,...interference wave impedance, Zf...
... Filter impedance, Zl ... Telephone impedance.
Claims (1)
ドチョークコイルと、該コモンモードチョークコイルに
結合された、可変インダクタンス素子と可変容量素子と
からなる共振回路とを有することを特徴とする電話機へ
の妨害波の混入防止回路。A telephone set comprising: a common mode choke coil inserted and connected in series to a telephone line leading to the telephone set; and a resonant circuit consisting of a variable inductance element and a variable capacitance element coupled to the common mode choke coil. A circuit to prevent interference waves from entering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983118682U JPH066614Y2 (en) | 1983-08-01 | 1983-08-01 | Circuit to prevent interference with telephones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983118682U JPH066614Y2 (en) | 1983-08-01 | 1983-08-01 | Circuit to prevent interference with telephones |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6090921U true JPS6090921U (en) | 1985-06-21 |
| JPH066614Y2 JPH066614Y2 (en) | 1994-02-16 |
Family
ID=30272686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983118682U Expired - Lifetime JPH066614Y2 (en) | 1983-08-01 | 1983-08-01 | Circuit to prevent interference with telephones |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066614Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010534947A (en) * | 2007-08-01 | 2010-11-11 | エプコス アクチエンゲゼルシャフト | Current compensation choke and circuit device having current compensation choke |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935128U (en) * | 1972-06-23 | 1974-03-28 |
-
1983
- 1983-08-01 JP JP1983118682U patent/JPH066614Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935128U (en) * | 1972-06-23 | 1974-03-28 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010534947A (en) * | 2007-08-01 | 2010-11-11 | エプコス アクチエンゲゼルシャフト | Current compensation choke and circuit device having current compensation choke |
| US9305695B2 (en) | 2007-08-01 | 2016-04-05 | Epcos Ag | Current-compensated choke and circuit arrangement with a current-compensated choke |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH066614Y2 (en) | 1994-02-16 |
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