JPS61158722U - - Google Patents

Info

Publication number
JPS61158722U
JPS61158722U JP4061985U JP4061985U JPS61158722U JP S61158722 U JPS61158722 U JP S61158722U JP 4061985 U JP4061985 U JP 4061985U JP 4061985 U JP4061985 U JP 4061985U JP S61158722 U JPS61158722 U JP S61158722U
Authority
JP
Japan
Prior art keywords
circuit
capacitor
pulse train
voltage
train signal
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
JP4061985U
Other languages
English (en)
Other versions
JPH0448012Y2 (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 JP1985040619U priority Critical patent/JPH0448012Y2/ja
Publication of JPS61158722U publication Critical patent/JPS61158722U/ja
Application granted granted Critical
Publication of JPH0448012Y2 publication Critical patent/JPH0448012Y2/ja
Expired legal-status Critical Current

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  • 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における音量制御回
路の回路図、第2図は第1図のステツプ―制御電
圧特性図、第3図イ,ロは夫々本考案の他の実施
例におけるパルス巾・電圧変換回路の回路図、第
4図は音量制御用のパルス列信号を示す図、第5
図は従来のステツプ―制御電圧特性図である。 1…マイコン、2,4…第1、第2IC、3…
パルス巾・電圧変換回路、ZD…ツエナダイオー
ド(スイツチング素子)。

Claims (1)

  1. 【実用新案登録請求の範囲】 パルス巾が音量最小に対応する第1状態から音
    量最大に対応する第n状態まで変化し得るパルス
    列信号を作成する回路と、該パルス列信号をスイ
    ツチングするトランジスタ及び該トランジスタ出
    力を積分する積分回路とからなり、前記パルス列
    信号をパルス巾・電圧変換して制御電圧を得る回
    路と、該制御電圧により音声信号の利得を制御す
    る回路とを備える音量制御回路において、 前記積分回路の積分コンデンサの端子電圧に応
    じて該コンデンサの放電時定数を切換えるスイツ
    チング素子を前記コンデンサの放電路に挿入して
    なる音量制御回路。
JP1985040619U 1985-03-20 1985-03-20 Expired JPH0448012Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985040619U JPH0448012Y2 (ja) 1985-03-20 1985-03-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985040619U JPH0448012Y2 (ja) 1985-03-20 1985-03-20

Publications (2)

Publication Number Publication Date
JPS61158722U true JPS61158722U (ja) 1986-10-01
JPH0448012Y2 JPH0448012Y2 (ja) 1992-11-12

Family

ID=30549675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985040619U Expired JPH0448012Y2 (ja) 1985-03-20 1985-03-20

Country Status (1)

Country Link
JP (1) JPH0448012Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005252725A (ja) * 2004-03-04 2005-09-15 Clarion Co Ltd 音響装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005203040A (ja) * 2004-01-16 2005-07-28 Fujitsu Ten Ltd 音響装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024045U (ja) * 1973-06-26 1975-03-18
JPS6193018U (ja) * 1984-11-20 1986-06-16

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024045U (ja) * 1973-06-26 1975-03-18
JPS6193018U (ja) * 1984-11-20 1986-06-16

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005252725A (ja) * 2004-03-04 2005-09-15 Clarion Co Ltd 音響装置
JP4514478B2 (ja) * 2004-03-04 2010-07-28 クラリオン株式会社 音響装置

Also Published As

Publication number Publication date
JPH0448012Y2 (ja) 1992-11-12

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