JPS5910141U

JPS5910141U - tape recorder

Info

Publication number: JPS5910141U
Application number: JP10475882U
Authority: JP
Inventors: 高倉　栄一
Original assignee: 松下電器産業株式会社
Priority date: 1982-07-09
Filing date: 1982-07-09
Publication date: 1984-01-23

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 the drawing]

第１図は従来例を示す回路図、第２図ａ、　　ｂ。Ｃは第１図の要部の電圧波形図、第３図は本考案の一実
施例を示す回路図、第４図ａ、　　ｂ、　　ｃは同要部
の電圧波形図である。１・・・マイクロフォン、２・・・録音増幅器、４・・
・音量ボリューム、５・・・電力増幅器、７・・・モー
タ電源制御装Ｍ、８・・・モータ、９．１８・・・スイ
ッチ、１０・・・電池、１１・・・ダイオード、１２．
　１４゜１７・・・抵抗、１３・・・コンデンサ、１５
．１６・・・トランジスタ。Fig. 1 is a circuit diagram showing a conventional example, and Fig. 2 a and b. C is a voltage waveform diagram of the main part of FIG. 1, FIG. 3 is a circuit diagram showing an embodiment of the present invention, and FIGS. 4a, b, and c are voltage waveform diagrams of the same main part. 1...Microphone, 2...Recording amplifier, 4...
- Volume volume, 5... Power amplifier, 7... Motor power supply control device M, 8... Motor, 9.18... Switch, 10... Battery, 11... Diode, 12.
14゜17...Resistor, 13...Capacitor, 15
．． 16...Transistor.

Claims

[Scope of utility model registration request]

A recording amplifier having a gain control circuit whose gain is controlled according to the level of an input signal from a microphone or the like to keep the recording level at an appropriate level at all times, and an output signal level of the recording amplifier above a certain level supplies electricity to a tape drive motor. a motor power control device for controlling the motor, a switch for selecting the supply of DC power or power from the motor power control device to the motor, and a switching means for switching the recovery time of the gain control circuit by means of a switch interlocked with the switch. and when a switch is changed so that the motor power is supplied from the motor power control device, the recovery time of the gain control circuit is shorter than the recovery time when the motor power is directly supplied from the DC power supply. A tape recorder configured to do this.