JPS58591U

JPS58591U - Automatic monauralization device

Info

Publication number: JPS58591U
Application number: JP9397881U
Authority: JP
Inventors: 縫村　義己
Original assignee: 株式会社東芝
Priority date: 1981-06-25
Filing date: 1981-06-25
Publication date: 1983-01-05

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ａ、　　ｂはそれぞれステレオ再生用ヘッドホン
の接続用ジャックにヘッドホンのプラグとイヤホンのプ
ラグが挿入された状態を示す図、−第２図はこの考案に
係る自動モノラル化装置の一実施例を示すブロック回路
図、第３図は第２図の具体的回路構成の一例を示す回路
図である。１２・・・・・・ヘッドホン、１２１・・・・・・プラ
グ、１３・・・・・・イヤホン、１３１・・・・・・プ
ラグ、２１・・・・・・混合回路、２２．２３・・・・
・・音声出力回路、２４・・曲ジャック、２５・・・・
・・バイアス検出回路、２４１−−−−−−左側信号出
力端子、２４２・・・・・・右側信号出力端子、２４３
・・・・・−ＧＮＤ端子。Figures 1a and 1b are diagrams showing a state in which a headphone plug and an earphone plug are inserted into the stereo playback headphone connection jack, respectively, - Figure 2 is an embodiment of the automatic monauralization device according to this invention FIG. 3 is a circuit diagram showing an example of the specific circuit configuration of FIG. 2. 12...Headphones, 121...Plug, 13...Earphones, 131...Plug, 21...Mixing circuit, 22.23. ...
...Audio output circuit, 24...Song jack, 25...
...Bias detection circuit, 241------Left signal output terminal, 242...Right signal output terminal, 243
...-GND terminal.

Claims

[Scope of utility model registration request]

(1) It has a first output terminal to which the left side signal of the stereo signal is led and a second output terminal to which the right side signal of the stereo signal is led, and the plug for taking out the stereo signal and the plug for taking out the monaural signal can be selectively connected. a jack connectable to the jack; a detection means for detecting which of the stereo signal extraction plug or the monaural signal extraction plug is connected to the jack; and a detection means for detecting whether the stereo signal extraction plug is connected to the stereo signal extraction plug. If it is detected that the left side signal and the right side signal are connected to the jack, the left side signal and the right side signal are supplied separately to the jack, and when it is detected that the monaural signal output plug is connected, the first and second signals are connected to the jack. An automatic monauralization device comprising mixing means for supplying a mixed signal of the left signal and the right signal to at least the terminals of the output terminals that are not short-circuited to the reference potential terminal.

(2) The detection means detects a bias change in an audio output circuit connected to the first output terminal and the second output terminal of the jack □ due to a load short circuit, thereby causing the jack - The automatic monauralization device according to claim 1, wherein the automatic monauralization device is configured to detect which of the signal extraction plug and the monaural signal extraction plug is connected.