JPS54112102A - Remover for unneeded signal - Google Patents

Remover for unneeded signal

Info

Publication number
JPS54112102A
JPS54112102A JP2027578A JP2027578A JPS54112102A JP S54112102 A JPS54112102 A JP S54112102A JP 2027578 A JP2027578 A JP 2027578A JP 2027578 A JP2027578 A JP 2027578A JP S54112102 A JPS54112102 A JP S54112102A
Authority
JP
Japan
Prior art keywords
signal
unneeded
circuit
level
amplifier
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
JP2027578A
Other languages
Japanese (ja)
Other versions
JPS5950145B2 (en
Inventor
Hisao Kuwabara
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2027578A priority Critical patent/JPS5950145B2/en
Publication of JPS54112102A publication Critical patent/JPS54112102A/en
Publication of JPS5950145B2 publication Critical patent/JPS5950145B2/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)
  • Noise Elimination (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To remove automatically unneeded signals without deriving any cancel signal, by equipping a circuit which removes the pilot signal of a FM stereo receiver with a hysteresis circuit making a connection and disconnection of a feedback loop to and from a negative feedback loop corresponding to the level of the unneeded signal. CONSTITUTION:A signal synchronizing with unneeded signal Vf0 in input signal VIN, outputted by PLL circuit 12, is applied via amplifier 18 to synchronous detector 14, and synchronous detection by the signal synchronized with unneeded signal Vf0 by circuit 12 is made to apply only the unneeded signal ff0 component to hysteresis circuit 16. By discriminating the level of unneeded signal ff0, circuit 16 disconnects closed loop L between voltage control amplifier 15 and detector 14 when the level is low, and turns into an ON state when high to form closed loop L, so that the out- of-phase component of unneeded signal Vf0 as a cancel signal will be outputted from amplifier 15 and then fed back to the input side of mixer 13.
JP2027578A 1978-02-23 1978-02-23 FM stereo receiver pilot signal removal device Expired JPS5950145B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2027578A JPS5950145B2 (en) 1978-02-23 1978-02-23 FM stereo receiver pilot signal removal device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2027578A JPS5950145B2 (en) 1978-02-23 1978-02-23 FM stereo receiver pilot signal removal device

Publications (2)

Publication Number Publication Date
JPS54112102A true JPS54112102A (en) 1979-09-01
JPS5950145B2 JPS5950145B2 (en) 1984-12-06

Family

ID=12022613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2027578A Expired JPS5950145B2 (en) 1978-02-23 1978-02-23 FM stereo receiver pilot signal removal device

Country Status (1)

Country Link
JP (1) JPS5950145B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093839A (en) * 1983-10-26 1985-05-25 Akai Electric Co Ltd Information transmission system using dither
JP2006074766A (en) * 2004-08-24 2006-03-16 Sony Deutsche Gmbh Backscatter interrogator reception method and interrogator for modulated backscatter system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093839A (en) * 1983-10-26 1985-05-25 Akai Electric Co Ltd Information transmission system using dither
JP2006074766A (en) * 2004-08-24 2006-03-16 Sony Deutsche Gmbh Backscatter interrogator reception method and interrogator for modulated backscatter system

Also Published As

Publication number Publication date
JPS5950145B2 (en) 1984-12-06

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