JPS61121020U - - Google Patents

Info

Publication number
JPS61121020U
JPS61121020U JP422785U JP422785U JPS61121020U JP S61121020 U JPS61121020 U JP S61121020U JP 422785 U JP422785 U JP 422785U JP 422785 U JP422785 U JP 422785U JP S61121020 U JPS61121020 U JP S61121020U
Authority
JP
Japan
Prior art keywords
changeover switch
input impedance
low
amplifier
contact
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
JP422785U
Other languages
English (en)
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 JP422785U priority Critical patent/JPS61121020U/ja
Publication of JPS61121020U publication Critical patent/JPS61121020U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Description

【図面の簡単な説明】
第1図……この考案の実施例の回路図、第2図
……従来装置の回路図。 1……増幅素子、2……帰還素子、S……切
換スイツチ。

Claims (1)

    【実用新案登録請求の範囲】
  1. 負帰還ループを備えた増幅器に於て、可動接点
    をアースした1回路2接点の切換スイツチを設け
    、一端を入力回路に接続された低入力インピーダ
    ンス用抵抗の他端を切換スイツチの一方の固定接
    点に接続し、出力端子とアースとの間に直列に接
    続された2個の分圧用抵抗の接続点を切換スイツ
    チの他方の固定接点に接続し、切換スイツチの操
    作により、低入力インピーダンスかつ高利得の状
    態と高入力インピーダンスかつ低利得の状態とを
    切り換えるようにしたことを特徴とする増幅器。
JP422785U 1985-01-18 1985-01-18 Pending JPS61121020U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP422785U JPS61121020U (ja) 1985-01-18 1985-01-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP422785U JPS61121020U (ja) 1985-01-18 1985-01-18

Publications (1)

Publication Number Publication Date
JPS61121020U true JPS61121020U (ja) 1986-07-30

Family

ID=30479599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP422785U Pending JPS61121020U (ja) 1985-01-18 1985-01-18

Country Status (1)

Country Link
JP (1) JPS61121020U (ja)

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