JPS6025287U

JPS6025287U - Audio multiplex broadcast display circuit for television receivers

Info

Publication number: JPS6025287U
Application number: JP11558583U
Authority: JP
Inventors: 斉子　巧
Original assignee: 株式会社東芝
Priority date: 1983-07-27
Filing date: 1983-07-27
Publication date: 1985-02-20

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図は従来の音声多重放送表示回路の回路構成を示す
回路図、第２図は本考案の一実施例に係る音声多重放送
表示回路の回路構成を示す回路図、第３図は第２図の動
作説明図である。２４・・・副チヤンネル搬送波検波回路、２７・・・２
音声放送判別回路、２８・・・表示回路部、Ｑ、、　Ｑ
２、Ｑ４・・・トランジスタ、Ｑ３？　Ｑ５・・・表示
素子、Ｄ□、−Ｄ２・・・ダイオード、Ｃ□・・・コン
デンサ、Ｒ□〜Ｒ６・・・抵抗。 ■ １− 第２図＋−ｌ　　　　　　　　ｌｌ１５ −ｈ’ｔ’ｓFIG. 1 is a circuit diagram showing the circuit configuration of a conventional audio multiplex broadcast display circuit, FIG. 2 is a circuit diagram showing the circuit configuration of an audio multiplex broadcast display circuit according to an embodiment of the present invention, and FIG. It is an explanatory diagram of the operation of the figure. 24... Sub-channel carrier detection circuit, 27...2
Audio broadcast discrimination circuit, 28...display circuit section, Q,, Q
2. Q4...Transistor, Q3? Q5... Display element, D□, -D2... Diode, C□... Capacitor, R□ to R6... Resistor. ■ 1- Figure 2 +-l ll15 -h't's

Claims

[Scope of utility model registration request]

In a television receiver that receives audio multiplex broadcasts of two audio broadcasts and stereo broadcasts in addition to monaural broadcasts, broadcast discrimination means for determining one of the audio multiplex broadcasts and derives a discrimination voltage, and audio multiplex broadcasting. It has a multiplex broadcast detection means that amplitude-demodulates the carrier wave of the sub-channel signal during reception and derives a demodulated output, and a first switching element driven by the discrimination voltage, and switching of this element causes the first display element to perform display operation. and a second switching element driven by the output from the first display means and the demodulated output from the multiplex broadcast detection means, and the switching of this element causes the second display element to an audio multiplex broadcast display circuit for a television receiver, comprising: second display means for displaying;