JPH0450913U - - Google Patents

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Publication number
JPH0450913U
JPH0450913U JP9415190U JP9415190U JPH0450913U JP H0450913 U JPH0450913 U JP H0450913U JP 9415190 U JP9415190 U JP 9415190U JP 9415190 U JP9415190 U JP 9415190U JP H0450913 U JPH0450913 U JP H0450913U
Authority
JP
Japan
Prior art keywords
power amplifier
speaker
output level
positive feedback
drive circuit
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
JP9415190U
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 JP9415190U priority Critical patent/JPH0450913U/ja
Publication of JPH0450913U publication Critical patent/JPH0450913U/ja
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Description

【図面の簡単な説明】
第1図は本考案のスピーカ駆動回路の回路構成
図、第2図は従来のスピーカ駆動回路を含むブロ
ツク構成図、第3図はスピーカ駆動回路の具体的
な回路構成図、第4図はインピーダンスカーブと
パワーアンプの周波数特性図である。 5……パワーアンプ、6……スピーカ、9……
正帰還アンプ、10……スピーカ駆動回路、11
……帰還電流制限回路、C……コンデンサ、D
……ダイオード、Q……トランジスタ、R
〜R,R,R,R……抵抗。

Claims (1)

  1. 【実用新案登録請求の範囲】 音声信号を任意量増幅してスピーカを駆動する
    パワーアンプと、上記スピーカに流れる電流に応
    じて上記パワーアンプに正帰還をかける正帰還ア
    ンプとを少なくとも有するスピーカ駆動回路にお
    いて、 上記パワーアンプの出力レベルを検出して、該
    出力レベルが所定レベルを越えた際には正帰還量
    を減少して、上記パワーアンプの出力レベルをほ
    ぼ一定とするような、帰還電流制限回路を付加し
    て構成したことを特徴とするスピーカ駆動回路。
JP9415190U 1990-09-07 1990-09-07 Pending JPH0450913U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9415190U JPH0450913U (ja) 1990-09-07 1990-09-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9415190U JPH0450913U (ja) 1990-09-07 1990-09-07

Publications (1)

Publication Number Publication Date
JPH0450913U true JPH0450913U (ja) 1992-04-28

Family

ID=31831873

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9415190U Pending JPH0450913U (ja) 1990-09-07 1990-09-07

Country Status (1)

Country Link
JP (1) JPH0450913U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015204600A (ja) * 2014-04-16 2015-11-16 ヤマハ株式会社 駆動装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5726909A (en) * 1980-07-25 1982-02-13 Toshiba Corp Distortion rejector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5726909A (en) * 1980-07-25 1982-02-13 Toshiba Corp Distortion rejector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015204600A (ja) * 2014-04-16 2015-11-16 ヤマハ株式会社 駆動装置

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