JPS59180208U

JPS59180208U - Emphasis switching circuit

Info

Publication number: JPS59180208U
Application number: JP7324883U
Authority: JP
Inventors: 文夫太田
Original assignee: 三洋電機株式会社
Priority date: 1983-05-17
Filing date: 1983-05-17
Publication date: 1984-12-01

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図は従来のエンファシス切り換え回路の結線図、第
２図以下の図面はこの考案のエンファシス切り換え回路
の１実施例を示し、第２図は結線図、第３図ａ　”−ｅ
は第２図の動作説明用タイミレグチャートである。５・・・ラインアンプ回路、６・・・信号出力端子、７
　　′・・・エンファシス切り換え入力端子、１ｏ・・
・ミューティング指令入力端子、１１・・・ミューティ
ング用リレースイッチ、１３・・・半導体スイッチ回路
、１４・・・論理ゲート回路、１５・・・第３時定数回
路、Ｑ２・・・第２トランジスタ。Figure 1 is a wiring diagram of a conventional emphasis switching circuit, Figure 2 and the following drawings show an embodiment of the emphasis switching circuit of this invention, Figure 2 is a wiring diagram, and Figure 3 a''-e.
is a timing leg chart for explaining the operation of FIG. 5... Line amplifier circuit, 6... Signal output terminal, 7
'...Emphasis switching input terminal, 1o...
- Muting command input terminal, 11... Muting relay switch, 13... Semiconductor switch circuit, 14... Logic gate circuit, 15... Third time constant circuit, Q2... Second transistor .

Claims

[Scope of utility model registration request]

An emphasis switching circuit that switches an operating time constant of an emphasis circuit according to a level change of an emphasis switching signal includes a semiconductor switch circuit that switches based on the -emphasis switching signal and switches the operating time constant, and a semiconductor switch circuit that delays a level change of the emphasis switching signal. a time constant circuit that outputs a delayed switching signal; a logic gate circuit that receives both of the switching signals and outputs a muting pulse signal when the level of the emphasis switching signal changes; and a logic gate circuit that outputs a muting pulse signal when the level of the emphasis switching signal changes; An emphasis switching circuit equipped with a muting circuit for muting a signal.