JPS5769507A - Fm demodulating circuit - Google Patents

Fm demodulating circuit

Info

Publication number
JPS5769507A
JPS5769507A JP55144384A JP14438480A JPS5769507A JP S5769507 A JPS5769507 A JP S5769507A JP 55144384 A JP55144384 A JP 55144384A JP 14438480 A JP14438480 A JP 14438480A JP S5769507 A JPS5769507 A JP S5769507A
Authority
JP
Japan
Prior art keywords
signal
supplied
amplifying circuit
carrier component
bands
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
JP55144384A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kimura
Shinichi Ohashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55144384A priority Critical patent/JPS5769507A/en
Publication of JPS5769507A publication Critical patent/JPS5769507A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/02—Analogue recording or reproducing
    • G11B20/06—Angle-modulation recording or reproducing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To demodulate an FM signal with less distortion, by selectively amplifying and emphasizing the carrier component of the FM signal by using a selective amplifying circuit, etc. CONSTITUTION:An FM signal having unbalance between both side wave bands of a low carrier FM system is supplied from an input 4 to a BPF1 to eliminate the signal in an unnecessary band, and then the resulting signal is supplied to a selective amplifying circuit 20 to be amplified so that the level of the carrier component is emphasized more than that of both side-bands. The output of the elective amplifying circuit 20 is passed through a limiter amplifier 2 to eliminate an AM component and supplied to an FM detector 3 to generate a carrier component at an output 5. In this case, the carrier component of the FM signal supplied to an FM detector 5 is emphasized by the selective amplifying circuit 20, large distortion is not generated even if both side-bands become unbalanced. Thus, the FM signal is demodulated stably with less distortion.
JP55144384A 1980-10-17 1980-10-17 Fm demodulating circuit Pending JPS5769507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55144384A JPS5769507A (en) 1980-10-17 1980-10-17 Fm demodulating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55144384A JPS5769507A (en) 1980-10-17 1980-10-17 Fm demodulating circuit

Publications (1)

Publication Number Publication Date
JPS5769507A true JPS5769507A (en) 1982-04-28

Family

ID=15360872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55144384A Pending JPS5769507A (en) 1980-10-17 1980-10-17 Fm demodulating circuit

Country Status (1)

Country Link
JP (1) JPS5769507A (en)

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