JPS59180513U

JPS59180513U - amplifier circuit

Info

Publication number: JPS59180513U
Application number: JP7427783U
Authority: JP
Inventors: 岩船　嘉助
Original assignee: 日本ビクター株式会社
Priority date: 1983-05-18
Filing date: 1983-05-18
Publication date: 1984-12-03

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 drawings]

第１図及び第２図Ａ、　Ｂは夫々本考案回路の一実施例
の回路図及びその動作説明用信号波形図である。２・・・アンプ、３・・・オーディオ信号入力端子、５
・・・電圧コンパレータ、６ａ、　６ｂ・・・定電流源
、７・・・ＩＣ，Ｓ・・・スイッチ、ＶＣＣ・・・電源
。FIG. 1 and FIGS. 2A and 2B are a circuit diagram of an embodiment of the circuit of the present invention and a signal waveform diagram for explaining its operation, respectively. 2...Amplifier, 3...Audio signal input terminal, 5
...Voltage comparator, 6a, 6b... Constant current source, 7... IC, S... Switch, VCC... Power supply.

Claims

[Scope of utility model registration request]

(1) A control signal when the voltage value of the power supply connected to the circuit is compared with a preset threshold value and the power supply voltage value is greater than the internuclear value. A power supply voltage comparator that outputs other control signals when the voltage is smaller than a threshold, and the negative control signal increases the power supply amount of the constant current source, and the other control signal decreases the current amount of the constant current source. An amplifier circuit consisting of constant current drive amplifiers that can be switched individually.

(2) The power supply voltage comparator has a predetermined width for its threshold value, and even if the power supply voltage value falls below the upper limit of the threshold value, it outputs the - control signal until it reaches the lower limit of the threshold value. However, even if the power supply voltage value becomes equal to or higher than the lower limit of the threshold value, the other control signal is outputted until the upper limit of the threshold value is reached. Amplification circuit.