JPS58150351A - 受話増幅用ａｇｃ回路 - Google Patents

受話増幅用ａｇｃ回路

Info

Publication number
JPS58150351A
JPS58150351A JP57033390A JP3339082A JPS58150351A JP S58150351 A JPS58150351 A JP S58150351A JP 57033390 A JP57033390 A JP 57033390A JP 3339082 A JP3339082 A JP 3339082A JP S58150351 A JPS58150351 A JP S58150351A
Authority
JP
Japan
Prior art keywords
capacitor
transistor
agc circuit
agc
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
JP57033390A
Other languages
English (en)
Japanese (ja)
Other versions
JPS644687B2 (enExample
Inventor
Masaharu Sato
正春 佐藤
Hiroshi Kawabe
河辺　博
Mitsuo Sato
光男 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP57033390A priority Critical patent/JPS58150351A/ja
Publication of JPS58150351A publication Critical patent/JPS58150351A/ja
Publication of JPS644687B2 publication Critical patent/JPS644687B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
JP57033390A 1982-03-02 1982-03-02 受話増幅用ａｇｃ回路 Granted JPS58150351A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57033390A JPS58150351A (ja) 1982-03-02 1982-03-02 受話増幅用ａｇｃ回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57033390A JPS58150351A (ja) 1982-03-02 1982-03-02 受話増幅用ａｇｃ回路

Publications (2)

Publication Number Publication Date
JPS58150351A true JPS58150351A (ja) 1983-09-07
JPS644687B2 JPS644687B2 (enExample) 1989-01-26

Family

ID=12385256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57033390A Granted JPS58150351A (ja) 1982-03-02 1982-03-02 受話増幅用ａｇｃ回路

Country Status (1)

Country Link
JP (1) JPS58150351A (enExample)

Also Published As

Publication number Publication date
JPS644687B2 (enExample) 1989-01-26

Similar Documents

Publication Publication Date Title
US4490585A (en) Hearing aid
CA1058340A (en) Two-way loudspeaking device for telephone stations
US4025728A (en) Speaker telephone
US3553386A (en) Telephone subscriber paging arrangement
JPS58150351A (ja) 受話増幅用ａｇｃ回路
JPS6199451A (ja) 電話機
JPH0425745B2 (enExample)
KR880010566A (ko) 증폭기의 이득 제어 회로
GB1349734A (en) Arrangements for amplifying and reproducing audio frequency signals
JPH0456450A (ja) 増幅回路
JPH0631797Y2 (ja) 受話増幅回路
JPS6348998Y2 (enExample)
JPH0445323Y2 (enExample)
JPS59180595A (ja) 音声認識装置
JPS58114659A (ja) インタ−ホン装置
JP3389430B2 (ja) 信号発生装置
JPS5880912A (ja) 送話回路
JPS6128261A (ja) 音響機器の電源装置
KR850003253Y1 (ko) 전화기의 대기음 발생장치
KR860003243Y1 (ko) 원격제어 정보신호 감지 입력회로
KR880002140Y1 (ko) 전화기의 송ㆍ수화회로
JPS56156055A (en) Automatic answering telephone set having time recording function
JPS62114097A (ja) 警報音等の発生装置
JPH0728331B2 (ja) 送受話切換回路
JPH10247969A (ja) 携帯電話用ハンズフリー装置