JPS5686558A - Carrier reproduction circuit - Google Patents

Carrier reproduction circuit

Info

Publication number
JPS5686558A
JPS5686558A JP16359579A JP16359579A JPS5686558A JP S5686558 A JPS5686558 A JP S5686558A JP 16359579 A JP16359579 A JP 16359579A JP 16359579 A JP16359579 A JP 16359579A JP S5686558 A JPS5686558 A JP S5686558A
Authority
JP
Japan
Prior art keywords
frequency
carrier
phase
divider
reproduction
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
JP16359579A
Other languages
Japanese (ja)
Other versions
JPS596102B2 (en
Inventor
Tomio Murayama
Fumio Miyao
Shigefumi Takeuchi
Kazumi Tsukioka
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP54163595A priority Critical patent/JPS596102B2/en
Priority to US06/216,704 priority patent/US4415933A/en
Publication of JPS5686558A publication Critical patent/JPS5686558A/en
Publication of JPS596102B2 publication Critical patent/JPS596102B2/en
Expired 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
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H04L27/066—Carrier recovery circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To increase the stability and reliability of carrier reproduction circuit, by digitally performing the correction of carrier reproduction even during the period of video information transmission. CONSTITUTION:The reference clock CLK 5 is frequency-divided with the frequency dividing ratio set with latch circuits 8, 7 at frequency-dividers 20a, 20b, to obtain the reproduction carrier 13. The phase of the carrier 13 starts delaying in comparison with the reception signal 14, and when the delay signal 16a is continuously produced from the phase comparison circuit 16, the switch 19 is switched and the frequency-dividing output S3 small in the frequency dividing ratio from the frequency-divider 20a is fed to the frequency divider 20b to advance the phase of the carrier 13. Inversely, when the phase of the carrier 13 is advanced, the switch 18 is open and the count operation of the frequency-divider 20a is stopped, allowing to make delay the phase of the carrier 13.
JP54163595A 1979-12-18 1979-12-18 Carrier regeneration circuit Expired JPS596102B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP54163595A JPS596102B2 (en) 1979-12-18 1979-12-18 Carrier regeneration circuit
US06/216,704 US4415933A (en) 1979-12-18 1980-12-15 Carrier wave recovery circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54163595A JPS596102B2 (en) 1979-12-18 1979-12-18 Carrier regeneration circuit

Publications (2)

Publication Number Publication Date
JPS5686558A true JPS5686558A (en) 1981-07-14
JPS596102B2 JPS596102B2 (en) 1984-02-09

Family

ID=15776899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54163595A Expired JPS596102B2 (en) 1979-12-18 1979-12-18 Carrier regeneration circuit

Country Status (1)

Country Link
JP (1) JPS596102B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58223944A (en) * 1982-06-21 1983-12-26 Nec Corp Digital type phase locked circuit
JPS5966251A (en) * 1982-10-07 1984-04-14 Nippon Telegr & Teleph Corp <Ntt> Carrier wave regenerating circuit for synchronous detection
JPS60259041A (en) * 1984-06-05 1985-12-21 Sharp Corp Psk signal demodulation circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58223944A (en) * 1982-06-21 1983-12-26 Nec Corp Digital type phase locked circuit
JPS5966251A (en) * 1982-10-07 1984-04-14 Nippon Telegr & Teleph Corp <Ntt> Carrier wave regenerating circuit for synchronous detection
JPS60259041A (en) * 1984-06-05 1985-12-21 Sharp Corp Psk signal demodulation circuit

Also Published As

Publication number Publication date
JPS596102B2 (en) 1984-02-09

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