JPS5583360A - Am stereophonic demodulator circuit - Google Patents

Am stereophonic demodulator circuit

Info

Publication number
JPS5583360A
JPS5583360A JP15637478A JP15637478A JPS5583360A JP S5583360 A JPS5583360 A JP S5583360A JP 15637478 A JP15637478 A JP 15637478A JP 15637478 A JP15637478 A JP 15637478A JP S5583360 A JPS5583360 A JP S5583360A
Authority
JP
Japan
Prior art keywords
signals
phase
signal
composite signal
direct
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
JP15637478A
Other languages
Japanese (ja)
Other versions
JPS6217423B2 (en
Inventor
Tsutomu Noda
Isao Akitake
Kazuhiko Yamazaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15637478A priority Critical patent/JPS5583360A/en
Publication of JPS5583360A publication Critical patent/JPS5583360A/en
Publication of JPS6217423B2 publication Critical patent/JPS6217423B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals

Landscapes

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

Abstract

PURPOSE:To reduce deterioration of separation caused by phase differences between a composite signal and two signals for synchronous detection by controlling gains of two variable gain amplifiers by the direct-current output voltage of a phase detector in a phase-locked loop circuit. CONSTITUTION:Two signals for synchronous detection synchronizing with an input signal are obtained by phase-locked loop circuit 2 and a composite signal is detected 7 and 8 separately and synchronously by those two signals to output right and left signals from adders 12 and 11. Here, two variable gain amplifiers 17 and 18 are inserted into at least either the sum signal or difference signal to control gains of amplifiers 17 and 18 by the direct-current output voltage of phase detector 3 in circuit 2. Consequently, deterioration in separation due to phase differences between the composite signal and two synchronous-detecting signals can be reduced.
JP15637478A 1978-12-20 1978-12-20 Am stereophonic demodulator circuit Granted JPS5583360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15637478A JPS5583360A (en) 1978-12-20 1978-12-20 Am stereophonic demodulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15637478A JPS5583360A (en) 1978-12-20 1978-12-20 Am stereophonic demodulator circuit

Publications (2)

Publication Number Publication Date
JPS5583360A true JPS5583360A (en) 1980-06-23
JPS6217423B2 JPS6217423B2 (en) 1987-04-17

Family

ID=15626349

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15637478A Granted JPS5583360A (en) 1978-12-20 1978-12-20 Am stereophonic demodulator circuit

Country Status (1)

Country Link
JP (1) JPS5583360A (en)

Also Published As

Publication number Publication date
JPS6217423B2 (en) 1987-04-17

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