JPS6047313U

JPS6047313U - amplifier circuit

Info

Publication number: JPS6047313U
Application number: JP13931283U
Authority: JP
Inventors: 孝則中野
Original assignee: 日本電気株式会社
Priority date: 1983-09-08
Filing date: 1983-09-08
Publication date: 1985-04-03

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の増幅回路を示す回路図、第２図は本考案
の実施例を示す回路図である。Ｒｓ・・・・・・信号源インピーダンス、ＲＬ・・・・
・・負荷インピーダンス、ＲＢｌｇ　’Ｒ１２・・・・
・・エミッタ抵抗、ＲｙｌｇＲｒｓ・・・・・・帰還抵
抗、Ｑ□、Ｑ２・・曲増幅用トランジスタ、１，２・・
・・・・信号入力端子、３・・・・・・バイアスコント
ロール用ボリウム、４・・・・・・インピーダンスコン
トロール用端子、５・・・・・・バイパスコンデンサ、
・６，８・・曲負荷抵抗挿入用端子、９．１０・・・・
・・差動増幅用トランジスタ、１１，１２…・・・イン
ピーダンスコントロール用トランジスタ、１３．１４・
・・・・・バイアス抵抗、１５；・量定電流回路、１６
・・・・・・エミッタフォロワトランジスタ、１７・・
・・・・カップリングコンデンサ、１８・・・・・・電
源端子、１９・・・・・・信号出力端子、２０・・・・
・・グランド用端子。FIG. 1 is a circuit diagram showing a conventional amplifier circuit, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. Rs... Signal source impedance, RL...
...Load impedance, RBlg 'R12...
...Emitter resistance, RylgRrs...Feedback resistance, Q□, Q2...Transistor for song amplification, 1,2...
... Signal input terminal, 3 ... Bias control volume, 4 ... Impedance control terminal, 5 ... Bypass capacitor,
・6, 8... Terminal for inserting curved load resistor, 9.10...
...Transistor for differential amplification, 11, 12...Transistor for impedance control, 13.14.
・・Bias resistance, 15;・Quantity constant current circuit, 16
...Emitter follower transistor, 17...
... Coupling capacitor, 18 ... Power supply terminal, 19 ... Signal output terminal, 20 ...
...Ground terminal.

Claims

[Scope of utility model registration request]

a differential amplifier including first and second transistors, and third and fourth transistors each having a collector connected to the emitter of the second transistor and an emitter connected to a constant current transistor or resistor, respectively. a terminal for externally applying a bias for impedance control to the bases of the third and fourth transistors, and an emitter follower transistor whose input is the collector output of one of the first and second transistors; and a low impedance wideband amplifier that receives this output as an input.