JPS5689142A - Multipath distortion detecting circuit of fm receiver - Google Patents

Multipath distortion detecting circuit of fm receiver

Info

Publication number
JPS5689142A
JPS5689142A JP16702779A JP16702779A JPS5689142A JP S5689142 A JPS5689142 A JP S5689142A JP 16702779 A JP16702779 A JP 16702779A JP 16702779 A JP16702779 A JP 16702779A JP S5689142 A JPS5689142 A JP S5689142A
Authority
JP
Japan
Prior art keywords
output
capacitor
signal
multipath distortion
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.)
Granted
Application number
JP16702779A
Other languages
Japanese (ja)
Other versions
JPS6228896B2 (en
Inventor
Takenori Ukari
Yoichi Yano
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.)
Sanyo Electric Co Ltd
Original Assignee
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP16702779A priority Critical patent/JPS5689142A/en
Priority to US06/210,378 priority patent/US4416024A/en
Priority to DE8080304577T priority patent/DE3067653D1/en
Priority to EP80304577A priority patent/EP0030874B1/en
Publication of JPS5689142A publication Critical patent/JPS5689142A/en
Publication of JPS6228896B2 publication Critical patent/JPS6228896B2/ja
Granted 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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1081—Reduction of multipath noise

Abstract

PURPOSE:To improve the detection precision of multipath distortion, by causing the output of the FM demodulating circuit to pass through a high-pass filter and by using the output as a multipath distortion detecting signal and by subjecting this signal to DC conversion to output the converted signal as the multipath distortion detection output. CONSTITUTION:The demodulation signal including distortion input to pulse noise eliminating circuit 9 is output to terminal 9a through a high-pass filter. The output is given to the base of transistor 203 through capacitor 201 and is amplified. Amplified noise and distortion components are rectified by voltage multiplying rectifier 207 and are given to the base of switching transistor 217. When the charging voltage of capacitor 223 reaches a prescribed value by the output, switching transistors 229 and 231 become conductive simultaneously. Consequently, capacitor 233 is inserted between the left signal output of the output of stereo demodulating circuit 11 and the earth, and capacitor 235 is inserted between the right signal output and the earth. As a result, high frequency components of the output of circuit 11 are reduced.
JP16702779A 1979-12-17 1979-12-21 Multipath distortion detecting circuit of fm receiver Granted JPS5689142A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP16702779A JPS5689142A (en) 1979-12-21 1979-12-21 Multipath distortion detecting circuit of fm receiver
US06/210,378 US4416024A (en) 1979-12-17 1980-11-26 Distortion reducing circuit in FM receiver
DE8080304577T DE3067653D1 (en) 1979-12-17 1980-12-17 Distortion reducing circuit for an fm receiver
EP80304577A EP0030874B1 (en) 1979-12-17 1980-12-17 Distortion reducing circuit for an fm receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16702779A JPS5689142A (en) 1979-12-21 1979-12-21 Multipath distortion detecting circuit of fm receiver

Publications (2)

Publication Number Publication Date
JPS5689142A true JPS5689142A (en) 1981-07-20
JPS6228896B2 JPS6228896B2 (en) 1987-06-23

Family

ID=15842025

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16702779A Granted JPS5689142A (en) 1979-12-17 1979-12-21 Multipath distortion detecting circuit of fm receiver

Country Status (1)

Country Link
JP (1) JPS5689142A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933355U (en) * 1982-08-25 1984-03-01 トヨタ自動車株式会社 FM radio for vehicle
JPS59108224A (en) * 1982-12-13 1984-06-22 日本高圧電気株式会社 Controller for switch
JPS59190747A (en) * 1983-04-13 1984-10-29 Sharp Corp Multipath distortion reducing device of fm receiver
JPH01174034A (en) * 1987-12-28 1989-07-10 Matsushita Electric Ind Co Ltd Radio tuner for fm broadcast reception

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5933355U (en) * 1982-08-25 1984-03-01 トヨタ自動車株式会社 FM radio for vehicle
JPS59108224A (en) * 1982-12-13 1984-06-22 日本高圧電気株式会社 Controller for switch
JPH0241855B2 (en) * 1982-12-13 1990-09-19
JPS59190747A (en) * 1983-04-13 1984-10-29 Sharp Corp Multipath distortion reducing device of fm receiver
JPH01174034A (en) * 1987-12-28 1989-07-10 Matsushita Electric Ind Co Ltd Radio tuner for fm broadcast reception

Also Published As

Publication number Publication date
JPS6228896B2 (en) 1987-06-23

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