JPS52141109A - Noise reduction system for demodulation signal from demodulation circuit of angle modulation wave signal - Google Patents

Noise reduction system for demodulation signal from demodulation circuit of angle modulation wave signal

Info

Publication number
JPS52141109A
JPS52141109A JP5818576A JP5818576A JPS52141109A JP S52141109 A JPS52141109 A JP S52141109A JP 5818576 A JP5818576 A JP 5818576A JP 5818576 A JP5818576 A JP 5818576A JP S52141109 A JPS52141109 A JP S52141109A
Authority
JP
Japan
Prior art keywords
signal
demodulation
angle modulation
modulation wave
noise reduction
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
JP5818576A
Other languages
Japanese (ja)
Other versions
JPS5644614B2 (en
Inventor
Yukinobu Ishigaki
Teruo Muraoka
Kohei Sasamura
Yasuo Ito
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP5818576A priority Critical patent/JPS52141109A/en
Publication of JPS52141109A publication Critical patent/JPS52141109A/en
Publication of JPS5644614B2 publication Critical patent/JPS5644614B2/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
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present

Landscapes

  • Noise Elimination (AREA)

Abstract

PURPOSE:To detect the amplitude envelope of angle modulation wave signal through envelope curve detection circuit and to reduce the noise occurring in the demodulation signal in correspondence with the existing period of disturbance signal.
JP5818576A 1976-05-20 1976-05-20 Noise reduction system for demodulation signal from demodulation circuit of angle modulation wave signal Granted JPS52141109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5818576A JPS52141109A (en) 1976-05-20 1976-05-20 Noise reduction system for demodulation signal from demodulation circuit of angle modulation wave signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5818576A JPS52141109A (en) 1976-05-20 1976-05-20 Noise reduction system for demodulation signal from demodulation circuit of angle modulation wave signal

Publications (2)

Publication Number Publication Date
JPS52141109A true JPS52141109A (en) 1977-11-25
JPS5644614B2 JPS5644614B2 (en) 1981-10-21

Family

ID=13076948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5818576A Granted JPS52141109A (en) 1976-05-20 1976-05-20 Noise reduction system for demodulation signal from demodulation circuit of angle modulation wave signal

Country Status (1)

Country Link
JP (1) JPS52141109A (en)

Also Published As

Publication number Publication date
JPS5644614B2 (en) 1981-10-21

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