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JPH0485835U - - Google Patents

Info

Publication number
JPH0485835U
JPH0485835U JP12510690U JP12510690U JPH0485835U JP H0485835 U JPH0485835 U JP H0485835U JP 12510690 U JP12510690 U JP 12510690U JP 12510690 U JP12510690 U JP 12510690U JP H0485835 U JPH0485835 U JP H0485835U
Authority
JP
Japan
Prior art keywords
audio signal
output
noise
transmitter
detector
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
JP12510690U
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 JP12510690U priority Critical patent/JPH0485835U/ja
Publication of JPH0485835U publication Critical patent/JPH0485835U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Transmitters (AREA)

Description

【図面の簡単な説明】
第１図は本考案の実施例を示すブロツク図、第
２図は本考案の詳細回路図、第３図は本考案の回
路の入出力特性図である。 １……防騒音形マイクロフオン、２……増幅器
、３……検出回路、４……制御回路、５……利得
可変増幅器。

Claims (1)

  1. 【実用新案登録請求の範囲】 防騒音形送話器と、 該送話器からの音声信号を制御信号により増幅
    度を変えて所望の音声信号出力を得る利得可変増
    幅器と、 前記防騒音形送話器の出力音声信号を整流して
    得られる直流電圧を周囲雑音と比較して決められ
    る所定の基準電圧と比較し該直流電圧が基準電圧
    を超えたとき音声信号有りを示す出力を得る検出
    器と、 該検出器の出力が存在する時間だけ前記利得可
    変増幅器の増幅度を定められた値だけ上げるよう
    な前記制御信号を出力する制御回路と を備えた送話器回路。
JP12510690U 1990-11-29 1990-11-29 Pending JPH0485835U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12510690U JPH0485835U (ja) 1990-11-29 1990-11-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12510690U JPH0485835U (ja) 1990-11-29 1990-11-29

Publications (1)

Publication Number Publication Date
JPH0485835U true JPH0485835U (ja) 1992-07-27

Family

ID=31872725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12510690U Pending JPH0485835U (ja) 1990-11-29 1990-11-29

Country Status (1)

Country Link
JP (1) JPH0485835U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06268607A (ja) * 1993-03-11 1994-09-22 Nec Corp ディジタル携帯電話機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58115912A (ja) * 1981-12-29 1983-07-09 Mitsubishi Electric Corp 送話装置
JPS6119232A (ja) * 1984-07-05 1986-01-28 Nippon Motoroola Kk 可搬型無線機における自動送信出力電力制御装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58115912A (ja) * 1981-12-29 1983-07-09 Mitsubishi Electric Corp 送話装置
JPS6119232A (ja) * 1984-07-05 1986-01-28 Nippon Motoroola Kk 可搬型無線機における自動送信出力電力制御装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06268607A (ja) * 1993-03-11 1994-09-22 Nec Corp ディジタル携帯電話機

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