JPS6017025U - variable filter - Google Patents

variable filter

Info

Publication number
JPS6017025U
JPS6017025U JP10735583U JP10735583U JPS6017025U JP S6017025 U JPS6017025 U JP S6017025U JP 10735583 U JP10735583 U JP 10735583U JP 10735583 U JP10735583 U JP 10735583U JP S6017025 U JPS6017025 U JP S6017025U
Authority
JP
Japan
Prior art keywords
amplifier
conversion circuit
capacitor
changed
filter
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
Application number
JP10735583U
Other languages
Japanese (ja)
Inventor
山根　秀雄
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP10735583U priority Critical patent/JPS6017025U/en
Publication of JPS6017025U publication Critical patent/JPS6017025U/en
Pending legal-status Critical Current

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  • Networks Using Active Elements (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

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

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 信号ラインにつながるコイルと、このフィルタにつなが
るインピーダンス変換回路と、印加電圧によりその抵抗
が変化する半導体素子と、増幅器及び増幅器の出力とイ
ンピーダンス変換回路の入力との間につながるキャパシ
タとで構成される可変フィルタにおいて、半導体素子に
加える電圧を変化させることにより、インピーダンス変
換回路入力と増幅器出力間の利得を変え、それによって
等節約にキャパシタの容量を変化させて、コイル及びキ
ャパシタの等価容量で決定されるフィルタの中心周波数
を変えるようにしたことを特徴とする可変フィルタ。It consists of a coil connected to the signal line, an impedance conversion circuit connected to this filter, a semiconductor element whose resistance changes depending on the applied voltage, and an amplifier and a capacitor connected between the output of the amplifier and the input of the impedance conversion circuit. In a variable filter, by changing the voltage applied to the semiconductor element, the gain between the input of the impedance conversion circuit and the output of the amplifier is changed, and thereby the capacitance of the capacitor is changed equally sparingly, and the value is determined by the equivalent capacitance of the coil and capacitor. A variable filter characterized in that the center frequency of the filter is changed.
JP10735583U 1983-07-11 1983-07-11 variable filter Pending JPS6017025U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10735583U JPS6017025U (en) 1983-07-11 1983-07-11 variable filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10735583U JPS6017025U (en) 1983-07-11 1983-07-11 variable filter

Publications (1)

Publication Number Publication Date
JPS6017025U true JPS6017025U (en) 1985-02-05

Family

ID=30250870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10735583U Pending JPS6017025U (en) 1983-07-11 1983-07-11 variable filter

Country Status (1)

Country Link
JP (1) JPS6017025U (en)

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