JPS58129727U

JPS58129727U - limita amplifier

Info

Publication number: JPS58129727U
Application number: JP2666182U
Authority: JP
Inventors: 秀明伊藤
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1982-02-26
Filing date: 1982-02-26
Publication date: 1983-09-02

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

[Brief explanation of the drawing]

第１図は従来のリミッタ増幅器を示す回路図、第２図は
第１図の動作説明のために示す波形図、第３図は本考案
に係るＩＪ　ミッタ増幅器の一実施例を示す回路図であ
る。５°・・・バイアス回路、１１〜１４〜差動増幅器、１
５・・・エミッタフォロワ回路、Ｑ□〜Ｑ□７・・・ト
ランジスタ、Ｒ１，Ｒ４，Ｒ７，Ｒ，、Ｒ□５．Ｒ工。、Ｒ１８・・・抵抗。Fig. 1 is a circuit diagram showing a conventional limiter amplifier, Fig. 2 is a waveform diagram shown to explain the operation of Fig. 1, and Fig. 3 is a circuit diagram showing an embodiment of the IJ limiter amplifier according to the present invention. be. 5°...bias circuit, 11-14-differential amplifier, 1
5... Emitter follower circuit, Q□ to Q□7... Transistor, R1, R4, R7, R,, R□5. R-engineer. , R18...resistance.

Claims

[Scope of utility model registration request]

at least one stage of a first differential amplifier having a differential pair transistor and an emitter-follower connected output transistor for outputting a voltage generated by a single collector resistor of the transistor; the output signal of the amplifier being connected to one input; a second differential amplifier 13 having a differential pair of transistors and an output transistor Q9 connected as an emitter follower that outputs the voltage generated by the collector resistance of one of the transistors; and an output transistor Q of this amplifier 13.
A resistor R whose one end is connected to the base of 9, and this R1
a third differential amplifier 14 having an emitter follower circuit 15 having the base of a transistor Q15 connected to the other end of the emitter follower circuit 15; and a differential pair transistor having one base connected to the emitter of the transistor Q15 of the emitter follower circuit 15; and a resistor R commonly connected in feedback from the emitter of the output transistor Q9 of the second differential amplifier 13 to the base of each one of the differential pair transistors of each of the differential amplifiers.
14, an emitter follower connected transistor for supplying power to the differential pair transistors of the first differential amplifier, and a resistor inserted between the base of this transistor and a bias circuit. limiter amplifier.