JPS5819520U - low pass filter - Google Patents
low pass filterInfo
- Publication number
- JPS5819520U JPS5819520U JP11356881U JP11356881U JPS5819520U JP S5819520 U JPS5819520 U JP S5819520U JP 11356881 U JP11356881 U JP 11356881U JP 11356881 U JP11356881 U JP 11356881U JP S5819520 U JPS5819520 U JP S5819520U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- point
- pass filter
- capacitor
- low pass
- 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.)
- Pending
Links
Landscapes
- Filters And Equalizers (AREA)
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図は本考案の１実施例を示す回路図で第２図はその
周波数減衰特性を示す図である。
１・・・入力端子、２・・・出力端子、Ｌｌ・・・第１
のコイル、Ｌ２・・・第２のコイル、Ｔ・・・タップ、
Ｌ３・・・第３のコイル、Ｃ１＋ Ｃ２＋ Ｃ３・・・
コンデンサ、ＳＷ・・・切換スイッチ。FIG. 1 is a circuit diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing its frequency attenuation characteristics. 1...Input terminal, 2...Output terminal, Ll...1st
coil, L2...second coil, T...tap,
L3...Third coil, C1+ C2+ C3...
Capacitor, SW...changeover switch.
Claims (1)
路の一端を入力端子に、他端を第２のコイルのタップ点
に接続し、第２のコイルの両端と接地間に第２、第３の
コンデンサを接続し、第３のコンデンサと第２のコイル
の接続点を出力端子に接続した２つの減衰極をもつロー
パスフィルタにおいて、第２、第３のコンデンサの一方
または・ 両方の接地点を切離し、第２のコイルには
誘導結合する第３のコイルを巻回し、第３のコイルの１
端を接地し、その他端の点Ａと、前記第２、第３のコン
デンサの接地から切離された点Ｂとのいずれかを選択し
て接地させる切換スイッチをもっことを特徴とする２つ
の減衰極をもつローパスフィルタ。One end of a parallel resonant circuit consisting of a first coil and a first capacitor is connected to an input terminal, the other end is connected to a tap point of a second coil, and a second In a low-pass filter with two attenuation poles, in which a third capacitor is connected and the connection point between the third capacitor and the second coil is connected to the output terminal, the ground point of one or both of the second and third capacitors is connected. A third coil that is inductively coupled is wound around the second coil, and one of the third coils is
One end of the capacitor is grounded, and the other end is a point A, and a point B separated from the ground of the second and third capacitors is selected and has a changeover switch for grounding. A low-pass filter with an attenuation pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11356881U JPS5819520U (en) | 1981-07-30 | 1981-07-30 | low pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11356881U JPS5819520U (en) | 1981-07-30 | 1981-07-30 | low pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5819520U true JPS5819520U (en) | 1983-02-07 |
Family
ID=29907867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11356881U Pending JPS5819520U (en) | 1981-07-30 | 1981-07-30 | low pass filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819520U (en) |
-
1981
- 1981-07-30 JP JP11356881U patent/JPS5819520U/en active Pending
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