JPS6095715U

JPS6095715U - Muting circuit

Info

Publication number: JPS6095715U
Application number: JP18834283U
Authority: JP
Inventors: 池内　康博; 井沢　克美
Original assignee: 株式会社東芝; 東芝オーデイオ・ビデオエンジニアリング株式会社
Priority date: 1983-12-06
Filing date: 1983-12-06
Publication date: 1985-06-29

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！ま従来のミューティング回路を示す構成説明図
、第２図はこの考案によるミューティング回路の一実施
例を示す構成説明図である。Ｓ４１、？　”１２・・・ミューティング用スイッチ回
路、十Ｂ・・・直流電源、Ｑ□・・・トランジスタ、Ｒ
１−Ｒ５・・・抵抗、Ｃ□、Ｃ２・・・コンデンサ、Ｔ
１・・・微分回路、Ｔ２・・・時定数回路、ＩＣ・・・
主回路。Figure 1! FIG. 2 is an explanatory diagram showing a configuration of a conventional muting circuit, and FIG. 2 is an explanatory diagram showing an embodiment of a muting circuit according to this invention. S41,? ``12... Muting switch circuit, 10B... DC power supply, Q□... Transistor, R
1-R5...Resistor, C□, C2...Capacitor, T
1... Differential circuit, T2... Time constant circuit, IC...
Main circuit.

Claims

[Scope of utility model registration request]

A muting switch circuit added to a function switch that can be switched between the first and second modes, a semiconductor switching element that is switched in response to switching of this switch circuit, and a semiconductor switching element that is turned on and off by this semiconductor switching element. A differentiating circuit and a time constant circuit that separately generate a muting signal and an NF amount switching signal from a power supply line, and an amplifier to which the muting signal and NF amount switching signal from the differentiating circuit and time constant circuit are supplied. 1. A muting circuit comprising: a brush circuit having a section;