JPS5792939A - Am stereo receiver - Google Patents

Am stereo receiver

Info

Publication number
JPS5792939A
JPS5792939A JP17001280A JP17001280A JPS5792939A JP S5792939 A JPS5792939 A JP S5792939A JP 17001280 A JP17001280 A JP 17001280A JP 17001280 A JP17001280 A JP 17001280A JP S5792939 A JPS5792939 A JP S5792939A
Authority
JP
Japan
Prior art keywords
circuit
overmodulation
output
envelope detector
shock sound
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
JP17001280A
Other languages
Japanese (ja)
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 JP17001280A priority Critical patent/JPS5792939A/en
Publication of JPS5792939A publication Critical patent/JPS5792939A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To reduce the shock sound with simple constitution, by detecting the overmodulation of an amplitude modulation wave to mute the pop noise of an angle modulation demodulated wave. CONSTITUTION:The AM stereo signal inputted from an antenna is converted to an intermediate frequency by a front end part 1 and is amplified by an intermediate frequency amplifier 2 and is distributed to an envelope detector 3 and a frequency discriminator 4. The output of the envelope detector 3 and a frequency discriminator 4. The output of the envelope detector 3 is applied to one input terminal of a matrix circuit 5 as a sum signal through a delay circuit 7, and the existence of the overmodulation in the output of the envelope detector 3 is detected by an overmodulation detecting circuit 6. Meanwhile, the difference signal of stereo signals obtained by the frequency discriminator 4 is applied to a shock sound eliminating circuit 9 through a delay circuit 8; and if the overmodulation is detected, the difference signal is muted by the output of the overmodulation detecting circuit 6 to prevent the occurrence of the shock sound. The output of the shock sound eliminating circuit 9 is applied to the other input terminal of the matrix circuit 5.
JP17001280A 1980-12-01 1980-12-01 Am stereo receiver Pending JPS5792939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17001280A JPS5792939A (en) 1980-12-01 1980-12-01 Am stereo receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17001280A JPS5792939A (en) 1980-12-01 1980-12-01 Am stereo receiver

Publications (1)

Publication Number Publication Date
JPS5792939A true JPS5792939A (en) 1982-06-09

Family

ID=15896948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17001280A Pending JPS5792939A (en) 1980-12-01 1980-12-01 Am stereo receiver

Country Status (1)

Country Link
JP (1) JPS5792939A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62265828A (en) * 1986-04-01 1987-11-18 モトロ−ラ・インコ−ポレ−テツド Am stereophonic receiver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5787638A (en) * 1980-11-21 1982-06-01 Hitachi Ltd Am stereo receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5787638A (en) * 1980-11-21 1982-06-01 Hitachi Ltd Am stereo receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62265828A (en) * 1986-04-01 1987-11-18 モトロ−ラ・インコ−ポレ−テツド Am stereophonic receiver
JPH0549138B2 (en) * 1986-04-01 1993-07-23 Motorola Inc

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