JPS5986045U

JPS5986045U - Tape recorder control circuit

Info

Publication number: JPS5986045U
Application number: JP18076782U
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

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]

、図示した回路は本考案の制御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、６・・・第１主増幅回路、８・・・第
２磁気ヘツド、９・・・第２前置増幅回路、１１・・・
第２主増幅回路、１３・・・第１ミユーテイングトラン
ジ　　□スター、１５・・・第２ミユーテイングトラン
ジスター、１７・・・第３ミユーテイングトランジスタ
ー、１９・・・第１スイツチ、２０・・・第２スイツチ
、２１・・・第１制御トランジスター、２６・・・第２
制御トランジスター、３０・・・選択スイッチ、３１・
・・無信号部検出回路、３２・・・制御スイッチ、３３
・・・スイッチングトランジスター。, the illustrated circuit is one embodiment of the control circuit of the present invention. Explanation of main figure numbers: 1...first magnetic head, 2...first preamplifier circuit, 6...first main amplifier circuit, 8...second magnetic head, 9... Second preamplifier circuit, 11...
2nd main amplifier circuit, 13... 1st mutating transistor □ star, 15... 2nd muting transistor, 17... 3rd mutating transistor, 19... 1st switch, 20... second switch, 21...first control transistor, 26...second
Control transistor, 30... Selection switch, 31...
・・No-signal part detection circuit, 32 ・・Control switch, 33
...Switching transistor.

Claims

[Scope of utility model registration request]

In a tape recorder equipped with a song selection function that switches to a playback operation state by detecting a no-signal portion between signals recorded on a magnetic tape in a fast forward or rewind state, the following music selection operation is performed during playback operation. A magnetic head for reproducing signals recorded on a magnetic tape, a preamplifier circuit to which the signals reproduced by the magnetic head are input and amplify the signals, and a preamplifier circuit for amplifying the signals. A collector emitter path is connected between the main amplifier circuit that receives the input signal and amplifies the signal, and the output signal path of the preamplifier circuit and ground, and when the output signal path is in a conductive state. a first muting circuit for bypassing a signal; a second muting circuit having a collector-emitter path connected between the transistor and ground on the output signal path of the main amplifier circuit; and a second circuit for bypassing a signal on the output signal path when in a conductive state; a muting transistor; a control transistor that is conductive when the tape recorder is in a stopped state; and a control transistor that conducts the first muting transistor and the second muting transistor; and a control transistor that conducts or deconducts the first muting transistor during a music selection operation. a no-signal portion detection circuit that receives the output signal of the supplementary preamplifier circuit and detects a no-signal portion regardless of the input signal, and a switching transistor that conducts during fast forwarding or rewinding operation and makes the control transistor conductive. A control circuit for a tape recorder.