JPS56149122A - Radio receiver for vehicle - Google Patents

Radio receiver for vehicle

Info

Publication number
JPS56149122A
JPS56149122A JP5224580A JP5224580A JPS56149122A JP S56149122 A JPS56149122 A JP S56149122A JP 5224580 A JP5224580 A JP 5224580A JP 5224580 A JP5224580 A JP 5224580A JP S56149122 A JPS56149122 A JP S56149122A
Authority
JP
Japan
Prior art keywords
component
signal
detector
output
echo distortion
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
JP5224580A
Other languages
Japanese (ja)
Inventor
Masami Kubota
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP5224580A priority Critical patent/JPS56149122A/en
Publication of JPS56149122A publication Critical patent/JPS56149122A/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
    • H04H40/72—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 make inconspicuous a noise due to echo distortion by attenuating high- frequency components to a prescribed amount by detecting the peak value of an AM component included in an IF signal by detecting the AM component by an AM detector and then by holding the detected peak value. CONSTITUTION:When echo distortion is generated owing to a multipath, an AM component appears in IF signal (a) AGC-amplified by an IF amplifier. This AM component is extracted as a sine wave by removing an FM component by AM detector 7 to extract a half-wave component. Further, detector 7 extracts the half- wave component. Then, smoothing circuit 15 smooths the signal. Its smoothing output is waveform-shaped 16 into a DC signal by waveform shaping circuit 16 over the period when the AM component is detected. For example, if the output rises at level H, high-cut filter 11 is put in operation via the switch of control circuit 9 to attenuate the high frequency component of an FM demodulation output from IF amplifier 3 by a prescribed amount, thereby making inconspicuous a noise due to the echo distortion.
JP5224580A 1980-04-22 1980-04-22 Radio receiver for vehicle Pending JPS56149122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5224580A JPS56149122A (en) 1980-04-22 1980-04-22 Radio receiver for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5224580A JPS56149122A (en) 1980-04-22 1980-04-22 Radio receiver for vehicle

Publications (1)

Publication Number Publication Date
JPS56149122A true JPS56149122A (en) 1981-11-18

Family

ID=12909333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5224580A Pending JPS56149122A (en) 1980-04-22 1980-04-22 Radio receiver for vehicle

Country Status (1)

Country Link
JP (1) JPS56149122A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528704A (en) * 1975-07-09 1977-01-22 Sony Corp Fm receiver
JPS554190A (en) * 1978-06-26 1980-01-12 Mitsubishi Electric Corp Fm receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528704A (en) * 1975-07-09 1977-01-22 Sony Corp Fm receiver
JPS554190A (en) * 1978-06-26 1980-01-12 Mitsubishi Electric Corp Fm receiver

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