JPS6478043A - Fm stereoscopic demodulation circuit - Google Patents

Fm stereoscopic demodulation circuit

Info

Publication number
JPS6478043A
JPS6478043A JP62235442A JP23544287A JPS6478043A JP S6478043 A JPS6478043 A JP S6478043A JP 62235442 A JP62235442 A JP 62235442A JP 23544287 A JP23544287 A JP 23544287A JP S6478043 A JPS6478043 A JP S6478043A
Authority
JP
Japan
Prior art keywords
stereoscopic
signal
level
signal path
sum
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
JP62235442A
Other languages
Japanese (ja)
Inventor
Kazuhisa Ishiguro
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 JP62235442A priority Critical patent/JPS6478043A/en
Priority to US07/244,074 priority patent/US4972482A/en
Priority to DE88115018T priority patent/DE3887049T2/en
Priority to EP88115018A priority patent/EP0307887B1/en
Priority to KR1019880011988A priority patent/KR970000160B1/en
Publication of JPS6478043A publication Critical patent/JPS6478043A/en
Pending legal-status Critical Current

Links

Landscapes

  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To automatically adjust separation by performing the adjustment of the level of a signal on a stereoscopic difference signal path corresponding to the level difference of a stereoscopic sum signal path and a differential signal path netted in matrix just before at the time of delivering only a left side signal or a right side signal. CONSTITUTION:The titled circuit is equipped with a first level detection circuit 7 to detect the level of a stereoscopic sum signal, a second level detection signal 9 to detect the level of a stereoscopic differential signal, and a comparator 10 to compare the output DC voltage of a first level detection circuit with that of a second level detection circuit. And the level comparison of the signal on the stereoscopic sum signal path and the signal on the stereoscopic differential signal path netted in matrix just before is performed and only when a level difference is smaller, a variable gain amplifier circuit 4 is controlled so as to conform the level of the signal on the stereoscopic sum signal path to the signal on the stereoscopic differential signal path. In such a way, it is possible to adjust the separation automatically.
JP62235442A 1987-09-18 1987-09-18 Fm stereoscopic demodulation circuit Pending JPS6478043A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62235442A JPS6478043A (en) 1987-09-18 1987-09-18 Fm stereoscopic demodulation circuit
US07/244,074 US4972482A (en) 1987-09-18 1988-09-13 Fm stereo demodulator
DE88115018T DE3887049T2 (en) 1987-09-18 1988-09-14 FM stereo demodulators.
EP88115018A EP0307887B1 (en) 1987-09-18 1988-09-14 FM stereo demodulator
KR1019880011988A KR970000160B1 (en) 1987-09-18 1988-09-16 Fm stereo demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62235442A JPS6478043A (en) 1987-09-18 1987-09-18 Fm stereoscopic demodulation circuit

Publications (1)

Publication Number Publication Date
JPS6478043A true JPS6478043A (en) 1989-03-23

Family

ID=16986171

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62235442A Pending JPS6478043A (en) 1987-09-18 1987-09-18 Fm stereoscopic demodulation circuit

Country Status (1)

Country Link
JP (1) JPS6478043A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847201A (en) * 1971-10-15 1973-07-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4847201A (en) * 1971-10-15 1973-07-05

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