JPS5575379A - Multiple signal demodulator - Google Patents

Multiple signal demodulator

Info

Publication number
JPS5575379A
JPS5575379A JP14931578A JP14931578A JPS5575379A JP S5575379 A JPS5575379 A JP S5575379A JP 14931578 A JP14931578 A JP 14931578A JP 14931578 A JP14931578 A JP 14931578A JP S5575379 A JPS5575379 A JP S5575379A
Authority
JP
Japan
Prior art keywords
signal
circuit
output
control
circuits
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.)
Granted
Application number
JP14931578A
Other languages
Japanese (ja)
Other versions
JPS5917589B2 (en
Inventor
Junichi Hikita
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.)
Rohm Co Ltd
Original Assignee
Rohm Co Ltd
Toyo Electronics Industry Corp
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 Rohm Co Ltd, Toyo Electronics Industry Corp filed Critical Rohm Co Ltd
Priority to JP53149315A priority Critical patent/JPS5917589B2/en
Publication of JPS5575379A publication Critical patent/JPS5575379A/en
Publication of JPS5917589B2 publication Critical patent/JPS5917589B2/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE:To prevent occurrence of the miscontrol when the control is given to the signal process system of the demodulator circuit by controlling the signal process system not only via the output of the control signal frequency deciding unit but via the logic product with the signal obtained from the subchannel signal. CONSTITUTION:The multiple signal sent from the IF amplifier circuit is applied to FM detector circuit 1 for the FM demodulation to deliver FM demodulation signal F. Signal F is applied to LPF2 and BPF3 to deliver main channel signal M, subchannel signal S and control channel signal C each. At the same time, signal M is applied to demodulator circuit 15 via amplifier 5, signal S is applied to FM demodulator 8 via amplifier 6, the output of amplifier 6 is applied to subchannel signal detector 9, and the output of demodulator 8 is applied to circuit 15 respectively. Furthermore, signal C is applied to control signal frequency deciding circuits 11 and 12 via AM detector circuit 10, and the logic product is secured through AND circuits 13 and 14 between the output signals of circuits 11 and 12 and the output of detector 9. Then the control is given to the demodulation process of circuit 15 via the output of circuits 13 and 14.
JP53149315A 1978-12-01 1978-12-01 Multiple signal demodulator Expired JPS5917589B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53149315A JPS5917589B2 (en) 1978-12-01 1978-12-01 Multiple signal demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53149315A JPS5917589B2 (en) 1978-12-01 1978-12-01 Multiple signal demodulator

Publications (2)

Publication Number Publication Date
JPS5575379A true JPS5575379A (en) 1980-06-06
JPS5917589B2 JPS5917589B2 (en) 1984-04-21

Family

ID=15472428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53149315A Expired JPS5917589B2 (en) 1978-12-01 1978-12-01 Multiple signal demodulator

Country Status (1)

Country Link
JP (1) JPS5917589B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55156483A (en) * 1979-05-24 1980-12-05 Mitsubishi Electric Corp Signal discriminating circuit
JPS55161476A (en) * 1979-05-31 1980-12-16 Matsushita Electric Ind Co Ltd Sound multiple receiving unit
JPS5714262A (en) * 1980-06-30 1982-01-25 Nec Home Electronics Ltd Malfunction preventing device for television audio multiplex receiver
JPS57162888A (en) * 1981-03-31 1982-10-06 Toshiba Corp Mode discriminating circuit
JPS588269U (en) * 1981-07-10 1983-01-19 株式会社東芝 Audio multiplex signal processing circuit
JPS5910080A (en) * 1982-07-07 1984-01-19 Nec Ic Microcomput Syst Ltd Receiver for television sound multiplex broadcast

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55156483A (en) * 1979-05-24 1980-12-05 Mitsubishi Electric Corp Signal discriminating circuit
JPS55161476A (en) * 1979-05-31 1980-12-16 Matsushita Electric Ind Co Ltd Sound multiple receiving unit
JPS6261192B2 (en) * 1979-05-31 1987-12-19 Matsushita Electric Ind Co Ltd
JPS5714262A (en) * 1980-06-30 1982-01-25 Nec Home Electronics Ltd Malfunction preventing device for television audio multiplex receiver
JPS57162888A (en) * 1981-03-31 1982-10-06 Toshiba Corp Mode discriminating circuit
JPS6130465B2 (en) * 1981-03-31 1986-07-14 Tokyo Shibaura Electric Co
JPS588269U (en) * 1981-07-10 1983-01-19 株式会社東芝 Audio multiplex signal processing circuit
JPS5910080A (en) * 1982-07-07 1984-01-19 Nec Ic Microcomput Syst Ltd Receiver for television sound multiplex broadcast

Also Published As

Publication number Publication date
JPS5917589B2 (en) 1984-04-21

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