JPS55109046A - Stereo demodulator circuit - Google Patents

Stereo demodulator circuit

Info

Publication number
JPS55109046A
JPS55109046A JP1583579A JP1583579A JPS55109046A JP S55109046 A JPS55109046 A JP S55109046A JP 1583579 A JP1583579 A JP 1583579A JP 1583579 A JP1583579 A JP 1583579A JP S55109046 A JPS55109046 A JP S55109046A
Authority
JP
Japan
Prior art keywords
field intensity
stereo
monaural
signal
signals
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
JP1583579A
Other languages
Japanese (ja)
Other versions
JPS5853531B2 (en
Inventor
Kanji Tanaka
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP1583579A priority Critical patent/JPS5853531B2/en
Publication of JPS55109046A publication Critical patent/JPS55109046A/en
Publication of JPS5853531B2 publication Critical patent/JPS5853531B2/en
Expired 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

Landscapes

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

Abstract

PURPOSE:To avoid giving the feeling of physical disorder to the listener by switching the demodulation output from stereo to monaural mode in steps and thus improving the S/N in accordance with the field intensity. CONSTITUTION:When the field intensity is reduced, the signal applied to the control terminal decreases along with the switching signal of 38kHz decreased as well. As a result, the right-left separation of the stereo signals is deteriorated. When the field intensity reaches the prescribed level, the monaural signals are obtained through output terminals 33 and 34. At this moment, the mode transfers from stereo to monaural in sequence according to the deterioration of S/N, and thus the feeling of physical disorder caused by the improvement of S/N is not given to the listener. When the field intensity lowers down more, the value becomes approximate to each other between control signals t1 and t2 which are applied to 1st and 2nd sum signal circuits 21 and 21'. As a result, the signal being to flow to high-band cutting circuit 31 to cut the high band of the demodulation output, thus improving the S/N.
JP1583579A 1979-02-13 1979-02-13 stereo demodulation circuit Expired JPS5853531B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1583579A JPS5853531B2 (en) 1979-02-13 1979-02-13 stereo demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1583579A JPS5853531B2 (en) 1979-02-13 1979-02-13 stereo demodulation circuit

Publications (2)

Publication Number Publication Date
JPS55109046A true JPS55109046A (en) 1980-08-21
JPS5853531B2 JPS5853531B2 (en) 1983-11-30

Family

ID=11899888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1583579A Expired JPS5853531B2 (en) 1979-02-13 1979-02-13 stereo demodulation circuit

Country Status (1)

Country Link
JP (1) JPS5853531B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5672551A (en) * 1979-11-19 1981-06-16 Hitachi Ltd Frequency modulation receiver
JPS5738038A (en) * 1980-08-20 1982-03-02 Hitachi Ltd Fm receiver
JPS57208743A (en) * 1981-06-17 1982-12-21 Pioneer Electronic Corp Stereo demodulation circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5672551A (en) * 1979-11-19 1981-06-16 Hitachi Ltd Frequency modulation receiver
JPS6223501B2 (en) * 1979-11-19 1987-05-23 Hitachi Ltd
JPS5738038A (en) * 1980-08-20 1982-03-02 Hitachi Ltd Fm receiver
JPS6255742B2 (en) * 1980-08-20 1987-11-20 Hitachi Ltd
JPS57208743A (en) * 1981-06-17 1982-12-21 Pioneer Electronic Corp Stereo demodulation circuit
JPS6243624B2 (en) * 1981-06-17 1987-09-16 Pioneer Electronic Corp

Also Published As

Publication number Publication date
JPS5853531B2 (en) 1983-11-30

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