JPS5986008U

JPS5986008U - Tape recorder muting circuit

Info

Publication number: JPS5986008U
Application number: JP18076682U
Authority: JP
Inventors: 正雄松田; 杉戸　収
Original assignee: 三洋電機株式会社
Priority date: 1982-11-30
Filing date: 1982-11-30
Publication date: 1984-06-11
Also published as: JPH0356914Y2

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 the drawing]

凶事した回路は本考案のミューティング回路の一実施例
である。主な図番の説明、１・・・第１磁気ヘツド、２・・・第
１前置増幅回路、５・・・第１主増幅回路、７・・・第
２磁気ヘツド、８．・・・第２前置増幅回路、１０・・
・第２主増幅回路、１２・・・第１ミユーテイングトラ
ンジスター、１４・・・第２ミユーテイングトランジス
ター、１６・・・第３ミユーテイングトランジスター、
１８・・・第１ミユーテイングトランジスター、２０・
・・第１スイツチ、２１・・・第２スイツチ、２２・・
・第１制御トランジスター、２７・・・第２制御トラン
ジスター、３０・・・第３制御トランジスター。The circuit that caused the mishap is an example of the muting circuit of the present invention. Explanation of main figure numbers: 1... First magnetic head, 2... First preamplifier circuit, 5... First main amplifier circuit, 7... Second magnetic head, 8. ...Second preamplifier circuit, 10...
・Second main amplifier circuit, 12...first mutating transistor, 14...second mutating transistor, 16...third mutating transistor,
18... first mutating transistor, 20...
...First switch, 21...Second switch, 22...
- First control transistor, 27... second control transistor, 30... third control transistor.

Claims

[Scope of utility model registration request]

A first tape comprising a drive mechanism for driving a first tape and a first magnetic head for reproducing signals recorded on the first tape.
A tape recorder incorporating a second tape recorder equipped with a drive mechanism for driving a second tape and a second magnetic head for reproducing signals recorded on the first tape, a first preamplifier circuit for amplifying the signal reproduced by the head;
a first main amplifier circuit to which an output signal from the first preamplifier circuit is applied and amplifies the signal; a second preamplifier circuit that amplifies the signal reproduced by the second magnetic head; a second main amplifier circuit to which output signals from the first preamplifier circuit and the second preamplifier circuit are applied and amplifies the signals; and a collector terminal between the output signal path of the first preamplifier circuit and ground. a first mutating torrent transistor that bypasses the signal of the output signal path when the main emitter path is connected and conductive; and a collector-emitter transistor between the output signal path of the first main amplifier circuit and ground. a second muting transistor for bypassing the signal in the output signal path when the path is connected and conductive; and a collector-to-emitter path connected between the output signal path of the second preamplifier circuit and ground. a third muting transistor which bypasses the signal of the output signal path when the output signal path is connected and conductive; a collector-emitter path is connected between the output signal path of the second main amplifier circuit and ground; a fourth muting transistor that bypasses the signal on the output signal path when in a conductive state; and a fourth muting transistor that conducts when the first tape recorder is in a stopped state, causing the first muting transistor and the second muting transistor to conduct. 1 control transistor and 2nd tape recorder?
a second control transistor which is conductive when the first tape recorder and the second tape recorder are in a stopped state, and which is conductive when the first tape recorder and the second tape recorder are both stopped; A muting circuit for a tape recorder comprising a third control transistor that conducts.