JPS56168451A - Receiver of am stereophonic broadcast - Google Patents

Receiver of am stereophonic broadcast

Info

Publication number
JPS56168451A
JPS56168451A JP7206380A JP7206380A JPS56168451A JP S56168451 A JPS56168451 A JP S56168451A JP 7206380 A JP7206380 A JP 7206380A JP 7206380 A JP7206380 A JP 7206380A JP S56168451 A JPS56168451 A JP S56168451A
Authority
JP
Japan
Prior art keywords
signal
stereo display
level
detects
frequency
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
JP7206380A
Other languages
Japanese (ja)
Other versions
JPS6312414B2 (en
Inventor
Yasuaki Inoue
Kanji Tanaka
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP7206380A priority Critical patent/JPS56168451A/en
Publication of JPS56168451A publication Critical patent/JPS56168451A/en
Publication of JPS6312414B2 publication Critical patent/JPS6312414B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To prevent a malfunction of a stereo display element caused by an undesired signal, by providing a detecting circuit that detects an undesired signal containing the frequency of an AM stereo display signal at an output terminal of a wave detection stage. CONSTITUTION:A detection circuit 22 consists of a pair of diodes 23 and 24 connected in the opposite polarity to each other, smoothing condensers 25 and 26 plus offset bias resistances 27, 28 and 29, and detects the signals approximate to the frequency of a stereo display signal. A level detecting comparator 30 detects the level of the signal detected by the circuit 22. An AM stereo display signal ID has a low frequency as much as 5Hz as well as a certain size. On the contrary, an undesired signal, which is caused by the S curve characteristics of a phase wave detection stage 6 during a tuning operation, etc., has a level of several hundred times as high as the signal ID. In this connection, by setting the reference level of a comparator 30 properly, a control signal can be produced in response to only the undesired signal.
JP7206380A 1980-05-28 1980-05-28 Receiver of am stereophonic broadcast Granted JPS56168451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7206380A JPS56168451A (en) 1980-05-28 1980-05-28 Receiver of am stereophonic broadcast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7206380A JPS56168451A (en) 1980-05-28 1980-05-28 Receiver of am stereophonic broadcast

Publications (2)

Publication Number Publication Date
JPS56168451A true JPS56168451A (en) 1981-12-24
JPS6312414B2 JPS6312414B2 (en) 1988-03-18

Family

ID=13478553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7206380A Granted JPS56168451A (en) 1980-05-28 1980-05-28 Receiver of am stereophonic broadcast

Country Status (1)

Country Link
JP (1) JPS56168451A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11230270B2 (en) 2018-03-02 2022-01-25 Mitsuba Corporation Wiper arm

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510251A (en) * 1978-07-10 1980-01-24 Hitachi Ltd Am stereophonic demodulator circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510251A (en) * 1978-07-10 1980-01-24 Hitachi Ltd Am stereophonic demodulator circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11230270B2 (en) 2018-03-02 2022-01-25 Mitsuba Corporation Wiper arm

Also Published As

Publication number Publication date
JPS6312414B2 (en) 1988-03-18

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