JPS6478044A - Television voice multiplex demodulation circuit - Google Patents

Television voice multiplex demodulation circuit

Info

Publication number
JPS6478044A
JPS6478044A JP23544187A JP23544187A JPS6478044A JP S6478044 A JPS6478044 A JP S6478044A JP 23544187 A JP23544187 A JP 23544187A JP 23544187 A JP23544187 A JP 23544187A JP S6478044 A JPS6478044 A JP S6478044A
Authority
JP
Japan
Prior art keywords
signal
stereoscopic
subchannel
adjustment
level 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.)
Granted
Application number
JP23544187A
Other languages
Japanese (ja)
Other versions
JP2735832B2 (en
Inventor
Akira Kabashima
Kanji Tanaka
Hirohisa Suzuki
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
Original Assignee
Sanyo Electric 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 filed Critical Sanyo Electric Co Ltd
Priority to JP62235441A priority Critical patent/JP2735832B2/en
Publication of JPS6478044A publication Critical patent/JPS6478044A/en
Application granted granted Critical
Publication of JP2735832B2 publication Critical patent/JP2735832B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To eliminate adjustment for separation by performing the level detection of an FM-modulated subchannel stereoscopic differential signal, and controlling a level change means corresponding to detected output. CONSTITUTION:The amplitude adjustment of a main signal is performed by providing a level detection circuit 18 to perform the level detection of a subchannel signal from a band-pass filter 15 which extracts the subchannel signal and controlling a variable gain amplifier circuit 13 corresponding to the amplitude of an FM-modulated subchannel signal. In such a way, it is possible to perform level alignment between a stereoscopic sum signal and the stereoscopic differential signal automatically, and to eliminate the necessity of the adjustment for the separation.
JP62235441A 1987-09-18 1987-09-18 Television sound multiplex demodulation circuit Expired - Fee Related JP2735832B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62235441A JP2735832B2 (en) 1987-09-18 1987-09-18 Television sound multiplex demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62235441A JP2735832B2 (en) 1987-09-18 1987-09-18 Television sound multiplex demodulation circuit

Publications (2)

Publication Number Publication Date
JPS6478044A true JPS6478044A (en) 1989-03-23
JP2735832B2 JP2735832B2 (en) 1998-04-02

Family

ID=16986158

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62235441A Expired - Fee Related JP2735832B2 (en) 1987-09-18 1987-09-18 Television sound multiplex demodulation circuit

Country Status (1)

Country Link
JP (1) JP2735832B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9741700B2 (en) 2015-03-23 2017-08-22 Hyundai Mobis Co., Ltd. Lighting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55104152A (en) * 1979-02-05 1980-08-09 Hitachi Ltd Am stereo demodulation circuit
JPS59151579A (en) * 1984-02-02 1984-08-30 Matsushita Electric Ind Co Ltd Sound multiplex demodulating device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55104152A (en) * 1979-02-05 1980-08-09 Hitachi Ltd Am stereo demodulation circuit
JPS59151579A (en) * 1984-02-02 1984-08-30 Matsushita Electric Ind Co Ltd Sound multiplex demodulating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9741700B2 (en) 2015-03-23 2017-08-22 Hyundai Mobis Co., Ltd. Lighting device

Also Published As

Publication number Publication date
JP2735832B2 (en) 1998-04-02

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees