JPS54157402A - Am stereo demodulator circuit - Google Patents

Am stereo demodulator circuit

Info

Publication number
JPS54157402A
JPS54157402A JP6581078A JP6581078A JPS54157402A JP S54157402 A JPS54157402 A JP S54157402A JP 6581078 A JP6581078 A JP 6581078A JP 6581078 A JP6581078 A JP 6581078A JP S54157402 A JPS54157402 A JP S54157402A
Authority
JP
Japan
Prior art keywords
signals
circuit
phase
output
shifter
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
JP6581078A
Other languages
Japanese (ja)
Inventor
Isao Akitake
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 JP6581078A priority Critical patent/JPS54157402A/en
Publication of JPS54157402A publication Critical patent/JPS54157402A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving

Landscapes

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

Abstract

PURPOSE:To obtain a motor-roller system stereo demodulator circuit which does not need the phase-shifter circuit so far required by obtaining the synchronous signal for demodulation of the right-left channel signals by using the output signals of the PLL circuit and the 90 deg. phase-shifter circuit. CONSTITUTION:The cosphi of the function of the sum/differential signals of the right and left signals R and L is deleted from stereo input signal fS via amplitude controller 3, PLL circuit 6, 90 deg. phase-shifter 7, multiplier 5, low-pass filter 4 and divider 2 each. Output fS' of divider 2 is applied to multipliers 10 and 11 along with output fS2=sinomegact of circuit 6 and output FS3=cosomegact of phase-shifter 7 which are used as the synchronous signals. These multipliers deliver the sum and differential signals of the right and left signals, and adders 16 and 17 separate the right and left signals of the sum and differential signals. And the separated signals are drawn out through low-pass filters 12 and 13.
JP6581078A 1978-06-02 1978-06-02 Am stereo demodulator circuit Pending JPS54157402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6581078A JPS54157402A (en) 1978-06-02 1978-06-02 Am stereo demodulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6581078A JPS54157402A (en) 1978-06-02 1978-06-02 Am stereo demodulator circuit

Publications (1)

Publication Number Publication Date
JPS54157402A true JPS54157402A (en) 1979-12-12

Family

ID=13297746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6581078A Pending JPS54157402A (en) 1978-06-02 1978-06-02 Am stereo demodulator circuit

Country Status (1)

Country Link
JP (1) JPS54157402A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5691409U (en) * 1979-12-14 1981-07-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5691409U (en) * 1979-12-14 1981-07-21

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