SE450984B - Reglerkrets for att reglera separationsforhallandet av fm-stereodemoduleringsutsignal - Google Patents

Reglerkrets for att reglera separationsforhallandet av fm-stereodemoduleringsutsignal

Info

Publication number
SE450984B
SE450984B SE8404344A SE8404344A SE450984B SE 450984 B SE450984 B SE 450984B SE 8404344 A SE8404344 A SE 8404344A SE 8404344 A SE8404344 A SE 8404344A SE 450984 B SE450984 B SE 450984B
Authority
SE
Sweden
Prior art keywords
circuit
current
amplifier
control
transistor
Prior art date
Application number
SE8404344A
Other languages
English (en)
Swedish (sv)
Other versions
SE8404344L (sv
SE8404344D0 (sv
Inventor
T Kuwajima
K Amazawa
Original Assignee
Nec Corp
Clarion 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, Clarion Co Ltd filed Critical Nec Corp
Publication of SE8404344D0 publication Critical patent/SE8404344D0/xx
Publication of SE8404344L publication Critical patent/SE8404344L/
Publication of SE450984B publication Critical patent/SE450984B/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • 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
    • H04B1/1661—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels
    • H04B1/1669—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal
    • H04B1/1676—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal of the sum or difference signal
    • 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
    • H04H40/63—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 separation improvements or adjustments
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Stereo-Broadcasting Methods (AREA)
SE8404344A 1983-09-02 1984-08-31 Reglerkrets for att reglera separationsforhallandet av fm-stereodemoduleringsutsignal SE450984B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58162379A JPS6053342A (ja) 1983-09-02 1983-09-02 制御回路

Publications (3)

Publication Number Publication Date
SE8404344D0 SE8404344D0 (sv) 1984-08-31
SE8404344L SE8404344L (sv) 1985-03-03
SE450984B true SE450984B (sv) 1987-09-07

Family

ID=15753454

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8404344A SE450984B (sv) 1983-09-02 1984-08-31 Reglerkrets for att reglera separationsforhallandet av fm-stereodemoduleringsutsignal

Country Status (4)

Country Link
US (1) US4612662A (enExample)
JP (1) JPS6053342A (enExample)
DE (1) DE3432175A1 (enExample)
SE (1) SE450984B (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202537A (ja) * 1985-03-06 1986-09-08 Clarion Co Ltd Ｆｍステレオ受信機におけるステレオ雑音低減回路
JPH0669150B2 (ja) * 1985-05-16 1994-08-31 クラリオン株式会社 Ｆｍ受信機
JPH088511B2 (ja) * 1987-01-23 1996-01-29 クラリオン株式会社 パルス性雑音除去装置
US4901350A (en) * 1989-04-20 1990-02-13 Delco Electronics Corporation Closed-loop audio attenuator
JP3802536B2 (ja) * 2004-02-20 2006-07-26 沖電気工業株式会社 オートゲインコントロール回路

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823268A (en) * 1972-06-07 1974-07-09 Mc Intosh Labor Inc Dynamic stereo separation control
JPS5243303A (en) * 1975-10-01 1977-04-05 Pioneer Electronic Corp Reversion circuit of fm stereo
US3999132A (en) * 1975-10-31 1976-12-21 Motorola, Inc. Stereo inhibit circuit
JPS539403A (en) * 1976-07-14 1978-01-27 Pioneer Electronic Corp Fm stereophonic receiver
JPS5646346A (en) * 1979-09-21 1981-04-27 Hitachi Ltd Control system for fm stereo demodulation
US4390749A (en) * 1981-04-13 1983-06-28 Superscope, Inc. Noise control system for FM radio

Also Published As

Publication number Publication date
US4612662A (en) 1986-09-16
JPS6053342A (ja) 1985-03-27
SE8404344L (sv) 1985-03-03
DE3432175A1 (de) 1985-03-21
JPS6349415B2 (enExample) 1988-10-04
SE8404344D0 (sv) 1984-08-31

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