JPS55120246A - Stereo demodulator - Google Patents

Stereo demodulator

Info

Publication number
JPS55120246A
JPS55120246A JP2652679A JP2652679A JPS55120246A JP S55120246 A JPS55120246 A JP S55120246A JP 2652679 A JP2652679 A JP 2652679A JP 2652679 A JP2652679 A JP 2652679A JP S55120246 A JPS55120246 A JP S55120246A
Authority
JP
Japan
Prior art keywords
comparison output
signal
phase
terminals
terminal
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
JP2652679A
Other languages
Japanese (ja)
Other versions
JPS6243381B2 (en
Inventor
Naotoshi Higashiyama
Kazuyuki Doi
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.)
NEC Corp
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering Ltd
Nippon 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 NEC Corp, NEC Engineering Ltd, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2652679A priority Critical patent/JPS55120246A/en
Publication of JPS55120246A publication Critical patent/JPS55120246A/en
Publication of JPS6243381B2 publication Critical patent/JPS6243381B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H04H40/45—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 for FM stereophonic broadcast systems receiving
    • H04H40/72—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 for FM stereophonic broadcast systems receiving for noise suppression
    • 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
    • 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
    • H04H40/45—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 for FM stereophonic broadcast systems receiving
    • H04H40/81—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 for FM stereophonic broadcast systems receiving for stereo-monaural switching

Landscapes

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

Abstract

PURPOSE:To enable reception which is never influenced by a noise when an electric field deteriorates in intensity, by controlling the supply of a subcarrier signal according to whether the phase comparison output of a pilot signal is greater or less than a reference potential. CONSTITUTION:A pilot signal arriving at terminal 17 is phase-compared 30 with a reference signal of 19kHz at terminal 18 and the comparison output is supplied via LPF40 to comparing amplifiers 1 and 2, where it is compared with reference voltage 24. This comparison output voltage sets bistable switch circuits 5-8 to supply out-of-phase subcarrier signals inputted to terminals 19 and 20 from switch circuit 50 to switching system stereo demodulator 60, and a stereo signal at terminal 28 is separated into left and right signals, which are outputted to terminals 26 and 27. On the other hand, when the phase comparison output is less than reference potential 24, circuits 5-8 are reset and the supply of the subcarrier signal from switch circuit 50 to demodulation circuit 60 is cut off, so that monoaural signals will appear at terminals 26 and 27.
JP2652679A 1979-03-07 1979-03-07 Stereo demodulator Granted JPS55120246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2652679A JPS55120246A (en) 1979-03-07 1979-03-07 Stereo demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2652679A JPS55120246A (en) 1979-03-07 1979-03-07 Stereo demodulator

Publications (2)

Publication Number Publication Date
JPS55120246A true JPS55120246A (en) 1980-09-16
JPS6243381B2 JPS6243381B2 (en) 1987-09-14

Family

ID=12195916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2652679A Granted JPS55120246A (en) 1979-03-07 1979-03-07 Stereo demodulator

Country Status (1)

Country Link
JP (1) JPS55120246A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5022561U (en) * 1973-06-25 1975-03-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5022561U (en) * 1973-06-25 1975-03-13

Also Published As

Publication number Publication date
JPS6243381B2 (en) 1987-09-14

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