JPS63147022U - - Google Patents

Info

Publication number
JPS63147022U
JPS63147022U JP3915187U JP3915187U JPS63147022U JP S63147022 U JPS63147022 U JP S63147022U JP 3915187 U JP3915187 U JP 3915187U JP 3915187 U JP3915187 U JP 3915187U JP S63147022 U JPS63147022 U JP S63147022U
Authority
JP
Japan
Prior art keywords
amplifying
signal
amplifying means
opening
closing
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
JP3915187U
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 JP3915187U priority Critical patent/JPS63147022U/ja
Publication of JPS63147022U publication Critical patent/JPS63147022U/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図は本考案の一実施例を示す回路図、第2
図はフオトカプラの他の実施例を示す回路図、第
3図は従来の構成による出力特性を示すグラフ図
、第4図は本考案による出力特性を示すグラフ図
である。 1:信号入力端子、2:前置増幅回路、3:主
増幅回路、4:スピーカ、5と5′:フオトカプ
ラ、6,7,8,9:抵抗、10:電源端子、1
1:スイツチングトランジスタ。

Claims (1)

  1. 【実用新案登録請求の範囲】 入力信号を増幅する増幅手段と、 該増幅手段の出力信号に応じて開閉するスイツ
    チ手段と、 該スイツチ手段の開閉により断続し、適宜前記
    増幅手段の信号の一部を前記増幅手段以外へ導く
    フオトカプラとを有することを特徴とする信号レ
    ベル制御装置。
JP3915187U 1987-03-19 1987-03-19 Pending JPS63147022U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3915187U JPS63147022U (ja) 1987-03-19 1987-03-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3915187U JPS63147022U (ja) 1987-03-19 1987-03-19

Publications (1)

Publication Number Publication Date
JPS63147022U true JPS63147022U (ja) 1988-09-28

Family

ID=30852060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3915187U Pending JPS63147022U (ja) 1987-03-19 1987-03-19

Country Status (1)

Country Link
JP (1) JPS63147022U (ja)

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