JPS59125112U

JPS59125112U - amplifier

Info

Publication number: JPS59125112U
Application number: JP257083U
Authority: JP
Inventors: 司西野
Original assignee: 日本コロムビア株式会社
Priority date: 1983-01-12
Filing date: 1983-01-12
Publication date: 1984-08-23

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図は従来の増幅器を示す回路図、第２図は本考案の
前提となった増幅器を示す回路図、第３図は本考案の一
実施例を示す回路図である。２９．３０．３３及び３４・・・トランジスタ、１２．
２５及び２６・・・コンデンサ。FIG. 1 is a circuit diagram showing a conventional amplifier, FIG. 2 is a circuit diagram showing an amplifier on which the present invention is based, and FIG. 3 is a circuit diagram showing an embodiment of the present invention. 29.30.33 and 34...transistor, 12.
25 and 26... capacitor.

Claims

[Scope of utility model registration request]

first and second transistors having different conductivity types, the input electrodes of which are commonly connected to the input terminal, and the emitters of which are grounded by a series circuit of a resistor and a capacitor;
and third and second transistors having the same conductivity type as the first and second transistors, respectively connected in cascode to the first and second transistors, having their collectors commonly connected to the output terminal, and having their bases grounded in an alternating current manner. 4 transistors, a constant current source that supplies a current to a connection point between each of the cascode-connected transistors, and a bias circuit that supplies a bias to the emitters of the first and second transistors, and the output An amplifier characterized in that a load resistor, a part of which is bypassed by a condenser, is connected to the terminals.