JPS62198720U - - Google Patents

Info

Publication number
JPS62198720U
JPS62198720U JP8994987U JP8994987U JPS62198720U JP S62198720 U JPS62198720 U JP S62198720U JP 8994987 U JP8994987 U JP 8994987U JP 8994987 U JP8994987 U JP 8994987U JP S62198720 U JPS62198720 U JP S62198720U
Authority
JP
Japan
Prior art keywords
capacitor
amplifier
input terminal
active filter
resistors
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
JP8994987U
Other languages
English (en)
Other versions
JPH0332101Y2 (ja
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 filed Critical
Priority to JP1987089949U priority Critical patent/JPH0332101Y2/ja
Publication of JPS62198720U publication Critical patent/JPS62198720U/ja
Application granted granted Critical
Publication of JPH0332101Y2 publication Critical patent/JPH0332101Y2/ja
Expired legal-status Critical Current

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Description

【図面の簡単な説明】
第１図は本考案の特性切換型アクテイブフイル
タを示す図、第２図は従来のフイルタ構成例を示
す図であつて、図において、１，２はフイルタ、
３は切換回路、１１は増幅器、１２，１３はコン
デンサ、１５，１６は抵抗、１７はスイツチであ
る。

Claims (1)

  1. 【実用新案登録請求の範囲】 信号入力端子１８と増幅率になる増幅器の入力
    端子間が直列に接続された第１及び第２の抵抗Ｒ
    １，Ｒ２１５，１６によつて接続され、 前記増幅器の出力端子１９と、前記第１、第２
    の抵抗Ｒ１，Ｒ２の相互結節点との間に第１のコ
    ンデンサＣ１１２が接続され、 前記第２の抵抗Ｒ２が接続される前記増幅器の
    入力端子と接地電位線との間に第２のコンデンサ
    Ｃ２１２が接続されてなる２次のローパスアクテ
    イブフイルタに於いて、 前記第２のコンデンサＣ２１２と並列に、スイ
    ツチ１３によつて接続／不接続が選択される第３
    のコンデンサＣ３１４が設けられ、 該第３のコンデンサＣ３１４が不接続の時は前
    記２次のアクテイブフイルタはｆ０＝ｆ０１且つ
    Ｑ＝Ｑ１であり、 前記第３のコンデンサＣ３１４が接続された時
    は前記２次のアクテイブフイルタはｆ０＝ｆ０２
    且つＱ＝Ｑ２であつて、 α＝Ｃ２／Ｃ１ ｍ＝Ｒ２／Ｒ１ と定義されるα及びｍの値が、 及び 但し、Ｋ：ｆ０２／ｆ０１ δ：Ｑ２／Ｑ１ Ｋ：前記増幅器の増幅率 なる関係を満たすように、前記Ｃ１，Ｃ２，Ｃ３
    ，Ｒ１，Ｒ２及びＫの値が選定されていることを
    特徴とする特性切換型ローパスアクテイブフイル
    タ。
JP1987089949U 1987-06-11 1987-06-11 Expired JPH0332101Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987089949U JPH0332101Y2 (ja) 1987-06-11 1987-06-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987089949U JPH0332101Y2 (ja) 1987-06-11 1987-06-11

Publications (2)

Publication Number Publication Date
JPS62198720U true JPS62198720U (ja) 1987-12-17
JPH0332101Y2 JPH0332101Y2 (ja) 1991-07-08

Family

ID=30949392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987089949U Expired JPH0332101Y2 (ja) 1987-06-11 1987-06-11

Country Status (1)

Country Link
JP (1) JPH0332101Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5147637U (ja) * 1974-10-07 1976-04-08
JPS5668022A (en) * 1979-11-09 1981-06-08 Toshiba Corp Active filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5147637U (ja) * 1974-10-07 1976-04-08
JPS5668022A (en) * 1979-11-09 1981-06-08 Toshiba Corp Active filter

Also Published As

Publication number Publication date
JPH0332101Y2 (ja) 1991-07-08

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