JPS57211811A - Demodulating circuit for modulated signal - Google Patents

Demodulating circuit for modulated signal

Info

Publication number
JPS57211811A
JPS57211811A JP56095899A JP9589981A JPS57211811A JP S57211811 A JPS57211811 A JP S57211811A JP 56095899 A JP56095899 A JP 56095899A JP 9589981 A JP9589981 A JP 9589981A JP S57211811 A JPS57211811 A JP S57211811A
Authority
JP
Japan
Prior art keywords
amplifier
signal
dropouts
limiter
switch
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
JP56095899A
Other languages
Japanese (ja)
Other versions
JPS6333234B2 (en
Inventor
Yasuharu Nakajima
Kazuo Tanishika
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.)
YUNIBAASARU PAIONIA KK
Pioneer Video Corp
Universal Pioneer Corp
Original Assignee
YUNIBAASARU PAIONIA KK
Pioneer Video Corp
Universal Pioneer 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 YUNIBAASARU PAIONIA KK, Pioneer Video Corp, Universal Pioneer Corp filed Critical YUNIBAASARU PAIONIA KK
Priority to JP56095899A priority Critical patent/JPS57211811A/en
Publication of JPS57211811A publication Critical patent/JPS57211811A/en
Publication of JPS6333234B2 publication Critical patent/JPS6333234B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To appropriately compensate dropouts even if many dropouts are generated by setting up the limit level of a limiter so that an output of an amplifier exceeds the limit level when the dropouts exceeding prescribed density are detected. CONSTITUTION:A frequency-modulated audio RF signal is amplified by an amplifier 1 and inputted to a band-pass filter 2 to extract an audio carrier component and the amplitude of the extracted component is limited by a limiter 3. The amplitude-limited signal is demodulated by a demodulator 4 and outputted through a switch 5. A dropout compensating signal taken out through a level detector 6, a comparator 7, a standard voltage 7', and a pulse width expanding circuit 8 is applied to the switch 5 to turn the switch 5 off during the signal is outputted and also integrated by a low-pass filter 10. A signal corresponding to the generation density of dropouts is inputted to the amplifier 1 to control the amplifier 1 so that the output of the amplifier 1 exceeds the limit level of the limiter 3.
JP56095899A 1981-06-23 1981-06-23 Demodulating circuit for modulated signal Granted JPS57211811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56095899A JPS57211811A (en) 1981-06-23 1981-06-23 Demodulating circuit for modulated signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56095899A JPS57211811A (en) 1981-06-23 1981-06-23 Demodulating circuit for modulated signal

Publications (2)

Publication Number Publication Date
JPS57211811A true JPS57211811A (en) 1982-12-25
JPS6333234B2 JPS6333234B2 (en) 1988-07-04

Family

ID=14150142

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56095899A Granted JPS57211811A (en) 1981-06-23 1981-06-23 Demodulating circuit for modulated signal

Country Status (1)

Country Link
JP (1) JPS57211811A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111408A (en) * 1982-12-16 1984-06-27 Pioneer Electronic Corp Fm signal demodulation circuit
JPS6074272U (en) * 1983-10-26 1985-05-24 旭光学工業株式会社 Audio signal dropout correction circuit
JPS6074273U (en) * 1983-10-26 1985-05-24 旭光学工業株式会社 Audio signal dropout correction circuit
JPS6077073U (en) * 1983-11-01 1985-05-29 パイオニア株式会社 Dropout compensation circuit for recorded information playback device
JPH03187606A (en) * 1989-12-18 1991-08-15 Matsushita Electric Ind Co Ltd Fm demodulator
JPH0468981A (en) * 1990-07-09 1992-03-04 Matsushita Electric Ind Co Ltd Fm demodulator

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111408A (en) * 1982-12-16 1984-06-27 Pioneer Electronic Corp Fm signal demodulation circuit
JPH0534842B2 (en) * 1982-12-16 1993-05-25 Pioneer Electronic Corp
JPS6074272U (en) * 1983-10-26 1985-05-24 旭光学工業株式会社 Audio signal dropout correction circuit
JPS6074273U (en) * 1983-10-26 1985-05-24 旭光学工業株式会社 Audio signal dropout correction circuit
JPS6077073U (en) * 1983-11-01 1985-05-29 パイオニア株式会社 Dropout compensation circuit for recorded information playback device
JPH0229570Y2 (en) * 1983-11-01 1990-08-08
JPH03187606A (en) * 1989-12-18 1991-08-15 Matsushita Electric Ind Co Ltd Fm demodulator
JP2626102B2 (en) * 1989-12-18 1997-07-02 松下電器産業株式会社 FM demodulator
JPH0468981A (en) * 1990-07-09 1992-03-04 Matsushita Electric Ind Co Ltd Fm demodulator
JP2626193B2 (en) * 1990-07-09 1997-07-02 松下電器産業株式会社 FM demodulator

Also Published As

Publication number Publication date
JPS6333234B2 (en) 1988-07-04

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