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JPS57129552A - Am stereo receiver - Google Patents

Am stereo receiver

Info

Publication number
JPS57129552A
JPS57129552A JP1590481A JP1590481A JPS57129552A JP S57129552 A JPS57129552 A JP S57129552A JP 1590481 A JP1590481 A JP 1590481A JP 1590481 A JP1590481 A JP 1590481A JP S57129552 A JPS57129552 A JP S57129552A
Authority
JP
Japan
Prior art keywords
signal
wave
systems
signals
stereo
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
JP1590481A
Other languages
Japanese (ja)
Other versions
JPS6312415B2 (en
Inventor
Masaaki Maekawa
Susumu Genban
Koichi Nakano
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP1590481A priority Critical patent/JPS57129552A/en
Publication of JPS57129552A publication Critical patent/JPS57129552A/en
Publication of JPS6312415B2 publication Critical patent/JPS6312415B2/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 realize the reception of the AM stereo broadcast of plural systems through a receiver, by making active a signal processing means suited to the system of the received signal based on a pilot signal. CONSTITUTION:An AM stereo broadcast electric wave, which contains the pilot signals which are different according to the systems and is obtained by giving the modulation of amplitude to an angle modulated wave which is generally expressed by cos[omegact + phi(t)], is received 1. The IF signal is demodulated by an envelope wave detector 3 to be applied to a matrix circuit 5 in the form of a sum signal as well as to a system changeover switch SW7 and a multiplier 8 via a buffer 6. At the same time, the difference signal of the IF signal is demodulated by an FM wave detector 4, and then the IF signals applied to an LPF9 and an equalizing amplifier 10. The output of FM wave detection is applied to the multiplier 8 when a system changeover switch SW11 is on. The pilot signals extracted through the LPF9 are detected by circuits 13, 14 and 16 according to the systems, and the switches SW11, 7 and 12 are driven in accordance with each detection output. As a result, the circuit 5 can reproduce both stereo and monaural signals.
JP1590481A 1981-02-04 1981-02-04 Am stereo receiver Granted JPS57129552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1590481A JPS57129552A (en) 1981-02-04 1981-02-04 Am stereo receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1590481A JPS57129552A (en) 1981-02-04 1981-02-04 Am stereo receiver

Publications (2)

Publication Number Publication Date
JPS57129552A true JPS57129552A (en) 1982-08-11
JPS6312415B2 JPS6312415B2 (en) 1988-03-18

Family

ID=11901756

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1590481A Granted JPS57129552A (en) 1981-02-04 1981-02-04 Am stereo receiver

Country Status (1)

Country Link
JP (1) JPS57129552A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60131800A (en) * 1983-12-20 1985-07-13 富士通テン株式会社 Pilot signal identifying circuit
JPS61107819A (en) * 1984-10-31 1986-05-26 Aiwa Co Ltd Method for extracting mixed identification signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60131800A (en) * 1983-12-20 1985-07-13 富士通テン株式会社 Pilot signal identifying circuit
JPS61107819A (en) * 1984-10-31 1986-05-26 Aiwa Co Ltd Method for extracting mixed identification signal

Also Published As

Publication number Publication date
JPS6312415B2 (en) 1988-03-18

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