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JPS5762619A - Channel selection system for stereo and monaural station in fm or am ratio receiver - Google Patents

Channel selection system for stereo and monaural station in fm or am ratio receiver

Info

Publication number
JPS5762619A
JPS5762619A JP13686380A JP13686380A JPS5762619A JP S5762619 A JPS5762619 A JP S5762619A JP 13686380 A JP13686380 A JP 13686380A JP 13686380 A JP13686380 A JP 13686380A JP S5762619 A JPS5762619 A JP S5762619A
Authority
JP
Japan
Prior art keywords
stereo
monaural
pilot signal
station
channel selection
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
JP13686380A
Other languages
Japanese (ja)
Inventor
Genichi Hayakawa
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP13686380A priority Critical patent/JPS5762619A/en
Publication of JPS5762619A publication Critical patent/JPS5762619A/en
Pending 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
    • H04H40/81—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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/005—Control by a pilot signal
    • 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
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/342—Muting when some special characteristic of the signal is sensed which distinguishes it from noise, e.g. using speech detector
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Noise Elimination (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To select only a stereo broadcast easily, by operating a sound muting circit when a pilot signal is not detected. CONSTITUTION:When the user wants to listen to a stereo broadcast, a switch SW1 is turned on to a operate a pilot signal discriminating circuit 13. When the pilot signal from the detection output signal is discriminated, the pilot signal is sent to a muting circuit 15 to release muting. As the result, this system is advantageous for the user who wants to listen to the stereo broadcast because a monaural broadcast can be cancelled.
JP13686380A 1980-10-01 1980-10-01 Channel selection system for stereo and monaural station in fm or am ratio receiver Pending JPS5762619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13686380A JPS5762619A (en) 1980-10-01 1980-10-01 Channel selection system for stereo and monaural station in fm or am ratio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13686380A JPS5762619A (en) 1980-10-01 1980-10-01 Channel selection system for stereo and monaural station in fm or am ratio receiver

Publications (1)

Publication Number Publication Date
JPS5762619A true JPS5762619A (en) 1982-04-15

Family

ID=15185273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13686380A Pending JPS5762619A (en) 1980-10-01 1980-10-01 Channel selection system for stereo and monaural station in fm or am ratio receiver

Country Status (1)

Country Link
JP (1) JPS5762619A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555618A (en) * 1978-10-20 1980-04-23 Hitachi Ltd Radio receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555618A (en) * 1978-10-20 1980-04-23 Hitachi Ltd Radio receiver

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