JPS5694857A - Demodulating circuit of am stereo signal - Google Patents

Demodulating circuit of am stereo signal

Info

Publication number
JPS5694857A
JPS5694857A JP17229979A JP17229979A JPS5694857A JP S5694857 A JPS5694857 A JP S5694857A JP 17229979 A JP17229979 A JP 17229979A JP 17229979 A JP17229979 A JP 17229979A JP S5694857 A JPS5694857 A JP S5694857A
Authority
JP
Japan
Prior art keywords
output
signal
synchronous
phase
stereo 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
JP17229979A
Other languages
Japanese (ja)
Inventor
Hideki Iwasaki
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP17229979A priority Critical patent/JPS5694857A/en
Publication of JPS5694857A publication Critical patent/JPS5694857A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To prevent a sudden S/N deterioration in a minute range of the input electric power in comparison with an envelope system, by demodulating the stereo signal by the synchronous wave detection system using no + or -pi/4 phase shifter. CONSTITUTION:The output of the VCO4 is applied to the synchronous phase wave detector 6 which detects the phase modulation component of the output of the limiter 2. On the other hand, the output sinwct of the VCO4 has a shift deflected by 90 deg. to the AM stereo signal es(t) and is thus shifted by 90 deg. by the phase shifter 7. Thus the signal of cosphi with a synchronous phase detection is obtained from the output of the detector 6. The signal cosphi is then applied to the subtractor circuit 8 to give a subtraction to the IF output es(t), and thus only the amplitude modulation signal component is delivered from the circuit 8. This signal is put into the synchronous detection circuits 9 and 10 to receive a synchronous detection by sinwct and coswct and then applied to the matrix circuit 11 for demodulation.
JP17229979A 1979-12-28 1979-12-28 Demodulating circuit of am stereo signal Pending JPS5694857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17229979A JPS5694857A (en) 1979-12-28 1979-12-28 Demodulating circuit of am stereo signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17229979A JPS5694857A (en) 1979-12-28 1979-12-28 Demodulating circuit of am stereo signal

Publications (1)

Publication Number Publication Date
JPS5694857A true JPS5694857A (en) 1981-07-31

Family

ID=15939345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17229979A Pending JPS5694857A (en) 1979-12-28 1979-12-28 Demodulating circuit of am stereo signal

Country Status (1)

Country Link
JP (1) JPS5694857A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008128136A (en) * 2006-11-22 2008-06-05 Diesel United:Kk Fuel injection valve and its usage
JP2009281346A (en) * 2008-05-26 2009-12-03 Denso Corp Fuel injection device
US8752774B2 (en) 2007-09-20 2014-06-17 Toyota Jidosha Kabushiki Kaisha Fuel injection control device of engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008128136A (en) * 2006-11-22 2008-06-05 Diesel United:Kk Fuel injection valve and its usage
US8752774B2 (en) 2007-09-20 2014-06-17 Toyota Jidosha Kabushiki Kaisha Fuel injection control device of engine
JP2009281346A (en) * 2008-05-26 2009-12-03 Denso Corp Fuel injection device

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