JPS5816917U - amplifier bias circuit - Google Patents

amplifier bias circuit

Info

Publication number
JPS5816917U
JPS5816917U JP11087981U JP11087981U JPS5816917U JP S5816917 U JPS5816917 U JP S5816917U JP 11087981 U JP11087981 U JP 11087981U JP 11087981 U JP11087981 U JP 11087981U JP S5816917 U JPS5816917 U JP S5816917U
Authority
JP
Japan
Prior art keywords
output stage
stage transistor
bias circuit
current
amplifier bias
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
JP11087981U
Other languages
Japanese (ja)
Other versions
JPS6334338Y2 (en
Inventor
伸悟 神谷
Original Assignee
ヤマハ株式会社
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 ヤマハ株式会社 filed Critical ヤマハ株式会社
Priority to JP11087981U priority Critical patent/JPS5816917U/en
Publication of JPS5816917U publication Critical patent/JPS5816917U/en
Application granted granted Critical
Publication of JPS6334338Y2 publication Critical patent/JPS6334338Y2/ja
Granted legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の増幅器のバイアス回路の一構成を示す回
路図、第２図はこの考案の基本構成を示すブロック図、
第３図はこの考案の一実施例の構成を示す回路図である
。 ２ａ〜２Ｃ，３ａ〜３Ｃ・・・・・・出力段トランジス
タ、１１ａ、１１ｂ・・・・・・電流検出用抵抗（エミ
ッタ抵抗）、１２・・・・・・最小電圧保持回路、１３
・・・・・・電流制御回路。Figure 1 is a circuit diagram showing the configuration of a conventional amplifier bias circuit, Figure 2 is a block diagram showing the basic configuration of this invention,
FIG. 3 is a circuit diagram showing the configuration of an embodiment of this invention. 2a to 2C, 3a to 3C... Output stage transistor, 11a, 11b... Current detection resistor (emitter resistance), 12... Minimum voltage holding circuit, 13
...Current control circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 出力段トランジスタに直列に介挿され同出力段トランジ
スタに流れる電流を検出する電流検出用抵抗と、この電
流検出用抵抗の両端間に発生する電圧の所定時間内にお
ける最小値を豚次検出して保持する最小電圧保持回路と
、この最小電圧保持回路の出力が所定の一定値となるよ
うに前記出力段トランジスタのアイドリング電流を変化
させる電流制御回路とを具備してなることを特徴とする
増幅器のバイアス回路。A current detection resistor is inserted in series with the output stage transistor to detect the current flowing through the output stage transistor, and the minimum value of the voltage generated between both ends of this current detection resistor is detected within a predetermined time. An amplifier comprising: a minimum voltage holding circuit; and a current control circuit changing the idling current of the output stage transistor so that the output of the minimum voltage holding circuit maintains a predetermined constant value. bias circuit.
JP11087981U 1981-07-25 1981-07-25 amplifier bias circuit Granted JPS5816917U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11087981U JPS5816917U (en) 1981-07-25 1981-07-25 amplifier bias circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11087981U JPS5816917U (en) 1981-07-25 1981-07-25 amplifier bias circuit

Publications (2)

Publication Number Publication Date
JPS5816917U true JPS5816917U (en) 1983-02-02
JPS6334338Y2 JPS6334338Y2 (en) 1988-09-12

Family

ID=29905235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11087981U Granted JPS5816917U (en) 1981-07-25 1981-07-25 amplifier bias circuit

Country Status (1)

Country Link
JP (1) JPS5816917U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5374348A (en) * 1976-12-15 1978-07-01 Toshiba Corp Transistor amplifying circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5374348A (en) * 1976-12-15 1978-07-01 Toshiba Corp Transistor amplifying circuit

Also Published As

Publication number Publication date
JPS6334338Y2 (en) 1988-09-12

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