JPH02108423U - - Google Patents

Info

Publication number
JPH02108423U
JPH02108423U JP1669289U JP1669289U JPH02108423U JP H02108423 U JPH02108423 U JP H02108423U JP 1669289 U JP1669289 U JP 1669289U JP 1669289 U JP1669289 U JP 1669289U JP H02108423 U JPH02108423 U JP H02108423U
Authority
JP
Japan
Prior art keywords
amplification factor
power supply
switching
circuit
drive voltage
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
JP1669289U
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 JP1669289U priority Critical patent/JPH02108423U/ja
Publication of JPH02108423U publication Critical patent/JPH02108423U/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図は本考案の増幅率切換回路を備えたテー
プレコーダの構成模式図である。 ２……電力増幅回路、４……スイツチング回路
、５……電圧比較回路。

Claims (1)

  1. 【実用新案登録請求の範囲】 増幅回路に対する駆動電圧の大きさを検出して
    該駆動電圧の電源が商用交流電源であるか電池電
    源であるかを検出する電源検出手段と、 この電源検出手段からの検出出力が電池電源を
    示すときに、前記増幅回路の増幅率を低下させる
    方向に切り換えるスイツチング手段と、 を備えたことを特徴とする増幅率切換回路。
JP1669289U 1989-02-15 1989-02-15 Pending JPH02108423U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1669289U JPH02108423U (ja) 1989-02-15 1989-02-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1669289U JPH02108423U (ja) 1989-02-15 1989-02-15

Publications (1)

Publication Number Publication Date
JPH02108423U true JPH02108423U (ja) 1990-08-29

Family

ID=31229840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1669289U Pending JPH02108423U (ja) 1989-02-15 1989-02-15

Country Status (1)

Country Link
JP (1) JPH02108423U (ja)

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