JPS5621481A - Automatic gain control circuit - Google Patents

Automatic gain control circuit

Info

Publication number
JPS5621481A
JPS5621481A JP9763179A JP9763179A JPS5621481A JP S5621481 A JPS5621481 A JP S5621481A JP 9763179 A JP9763179 A JP 9763179A JP 9763179 A JP9763179 A JP 9763179A JP S5621481 A JPS5621481 A JP S5621481A
Authority
JP
Japan
Prior art keywords
carrier signal
sampling
gain control
shaping circuit
pulse
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
JP9763179A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kashiwagi
Masashi Fukuyo
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9763179A priority Critical patent/JPS5621481A/en
Publication of JPS5621481A publication Critical patent/JPS5621481A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00095—Systems or arrangements for the transmission of the picture signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To make always the gain control voltage fixed according to the input voltage, by sampling the carrier signal by sampling pulses which hold always a fixed relation to the phase of the carrier signal. CONSTITUTION:Now, when the carrier signal is input to PLL15, the output wave having a frequency and a phase equal to those of the input signal is obtained from the output of PLL15. When pulse shaping circuit 17 is driven by this output wave, pulse shaping circuit 17 is triggerred by a prescribed level of the output wave to obtained. If pulse width shaping circuit 20 is triggerred by this trigger pulse, sampling pulses having a prescribed width required for sampling of the carrier signal are obtained.
JP9763179A 1979-07-31 1979-07-31 Automatic gain control circuit Pending JPS5621481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9763179A JPS5621481A (en) 1979-07-31 1979-07-31 Automatic gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9763179A JPS5621481A (en) 1979-07-31 1979-07-31 Automatic gain control circuit

Publications (1)

Publication Number Publication Date
JPS5621481A true JPS5621481A (en) 1981-02-27

Family

ID=14197505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9763179A Pending JPS5621481A (en) 1979-07-31 1979-07-31 Automatic gain control circuit

Country Status (1)

Country Link
JP (1) JPS5621481A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5853306A (en) * 1981-09-28 1983-03-29 Nippon Kokan Kk <Nkk> Rolling method for thick plate
JPS60166104A (en) * 1984-02-09 1985-08-29 Keiichiro Yoshida Forming method of ribbion wire by rolling

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5853306A (en) * 1981-09-28 1983-03-29 Nippon Kokan Kk <Nkk> Rolling method for thick plate
JPS60166104A (en) * 1984-02-09 1985-08-29 Keiichiro Yoshida Forming method of ribbion wire by rolling
JPH0453601B2 (en) * 1984-02-09 1992-08-27 Keiichiro Yoshida

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