JPS57170677A - Discriminating circuit of switching control signal for sound multiplex broadcasting - Google Patents

Discriminating circuit of switching control signal for sound multiplex broadcasting

Info

Publication number
JPS57170677A
JPS57170677A JP56054904A JP5490481A JPS57170677A JP S57170677 A JPS57170677 A JP S57170677A JP 56054904 A JP56054904 A JP 56054904A JP 5490481 A JP5490481 A JP 5490481A JP S57170677 A JPS57170677 A JP S57170677A
Authority
JP
Japan
Prior art keywords
output
terminal
signal
switching control
control signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56054904A
Other languages
Japanese (ja)
Inventor
Shunichi Nezu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56054904A priority Critical patent/JPS57170677A/en
Publication of JPS57170677A publication Critical patent/JPS57170677A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/607—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals for more than one sound signal, e.g. stereo, multilanguages

Abstract

PURPOSE:To operate a entitled device stably and precisely by dividing an output of a chrominance subcarrier generator so as to be used as a standard signal and comparing the frequency between the standard signal and a switching control signal. CONSTITUTION:A standard signal formed by dividing it from a chrominance subcarrier is inputted to a terminal (a) of a frequency comparator 11. When the frequency of an output of an AM detector 2 is higher than that of the standard signal, the output of a terminal (c) is ''1'' and the output of a terminal (d) is ''0''. When a signal with the frequency lower than that of the standard signal is inputted to a terminal (b), the output of the terminal (c) is ''0'' and the output of the terminal (d) is ''1''. Thus, AND gates 8, 9 generate outputs only at the output of a stereophonic signal and a double signal, enabling to discriminate the switching control signal. Thus, stable and precise operation can be performed and IC configulation can be easily formed, saving electric power.
JP56054904A 1981-04-10 1981-04-10 Discriminating circuit of switching control signal for sound multiplex broadcasting Pending JPS57170677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56054904A JPS57170677A (en) 1981-04-10 1981-04-10 Discriminating circuit of switching control signal for sound multiplex broadcasting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56054904A JPS57170677A (en) 1981-04-10 1981-04-10 Discriminating circuit of switching control signal for sound multiplex broadcasting

Publications (1)

Publication Number Publication Date
JPS57170677A true JPS57170677A (en) 1982-10-20

Family

ID=12983587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56054904A Pending JPS57170677A (en) 1981-04-10 1981-04-10 Discriminating circuit of switching control signal for sound multiplex broadcasting

Country Status (1)

Country Link
JP (1) JPS57170677A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61277278A (en) * 1985-05-31 1986-12-08 Nec Home Electronics Ltd Pal system television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61277278A (en) * 1985-05-31 1986-12-08 Nec Home Electronics Ltd Pal system television receiver

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