JPS5769982A - Audio reception circuit for television receiver - Google Patents

Audio reception circuit for television receiver

Info

Publication number
JPS5769982A
JPS5769982A JP55147151A JP14715180A JPS5769982A JP S5769982 A JPS5769982 A JP S5769982A JP 55147151 A JP55147151 A JP 55147151A JP 14715180 A JP14715180 A JP 14715180A JP S5769982 A JPS5769982 A JP S5769982A
Authority
JP
Japan
Prior art keywords
audio
signal
circuit
output
detection
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
JP55147151A
Other languages
Japanese (ja)
Inventor
Takemitsu Nishimori
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP55147151A priority Critical patent/JPS5769982A/en
Publication of JPS5769982A publication Critical patent/JPS5769982A/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

Abstract

PURPOSE:To avoid the circuit system from being affected by video signals, by directly picking up an audio IF signal with a narrow band filter from a tuner output and obtaining audio signal through direct detection of this signal. CONSTITUTION:An audio IF signal is picked up with an audio IF filter 14 by a signal inputted to an audio signal system 3 from a tuner 1, and after this signal is amplified at an audio IF amplifying circuit 15, it is in phase detection 18 directly to obtain the audio signal. On the other hand, the output of the amplifying circuit 15 is detected at an AM detection circuit 16, the output is applied to an AGC circuit 17 and the amplifying circuit 15 is in AGC control through the output of a circuit 17. In this case, the detected output of the detection circuit 16 is proportional to the received electric field strength and since the circuit 15 is in AGC control, allowing to obtain the audio IF signal with a constant amplitude independently of the reception electric field strength and video carrier level to audio level ratio (P/S).
JP55147151A 1980-10-20 1980-10-20 Audio reception circuit for television receiver Pending JPS5769982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55147151A JPS5769982A (en) 1980-10-20 1980-10-20 Audio reception circuit for television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55147151A JPS5769982A (en) 1980-10-20 1980-10-20 Audio reception circuit for television receiver

Publications (1)

Publication Number Publication Date
JPS5769982A true JPS5769982A (en) 1982-04-30

Family

ID=15423734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55147151A Pending JPS5769982A (en) 1980-10-20 1980-10-20 Audio reception circuit for television receiver

Country Status (1)

Country Link
JP (1) JPS5769982A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4102859A1 (en) * 1991-01-31 1992-08-20 Thomson Brandt Gmbh BROADCAST RECEIVER WITH NICAM DECODER
EP0624030A1 (en) * 1993-05-05 1994-11-09 Philips Patentverwaltung GmbH Circuit for controlling the amplitude of a sound signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4102859A1 (en) * 1991-01-31 1992-08-20 Thomson Brandt Gmbh BROADCAST RECEIVER WITH NICAM DECODER
EP0624030A1 (en) * 1993-05-05 1994-11-09 Philips Patentverwaltung GmbH Circuit for controlling the amplitude of a sound signal

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