JPS5518171A - Carrier wave reproducing device - Google Patents

Carrier wave reproducing device

Info

Publication number
JPS5518171A
JPS5518171A JP9181178A JP9181178A JPS5518171A JP S5518171 A JPS5518171 A JP S5518171A JP 9181178 A JP9181178 A JP 9181178A JP 9181178 A JP9181178 A JP 9181178A JP S5518171 A JPS5518171 A JP S5518171A
Authority
JP
Japan
Prior art keywords
carrier wave
oscillator
carry
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
JP9181178A
Other languages
Japanese (ja)
Other versions
JPS5759975B2 (en
Inventor
Kazuo Ogawa
Takayuki Ozaki
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 JP9181178A priority Critical patent/JPS5518171A/en
Publication of JPS5518171A publication Critical patent/JPS5518171A/en
Publication of JPS5759975B2 publication Critical patent/JPS5759975B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop

Landscapes

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

Abstract

PURPOSE:To prevent the false lead-in and to secure the reproduction of the correct carrier wave by starting the divider to sweep the oscillation frequency of the voltage control oscillator when the differential frequency obtained through mixture exceeds the fixed level. CONSTITUTION:Part of the oscillation output of voltage control oscillator 6 is mixed 8 with the output of reference oscillator 9, and the differential frequency component is drawn out to be applied to counter 21 for counting of the frequency in a fixed cycle. Counter 21 generates the carry signal when the count value exceeds a fixed number, and the carry singnal is divided by divider 22. This division signal sweeps the control voltage of oscillator 6. Thus the false lead-in, if occurs, can be detected immediately to carry out sweeping in order to secure the reproduction of the correct carrier wave.
JP9181178A 1978-07-27 1978-07-27 Carrier wave reproducing device Granted JPS5518171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9181178A JPS5518171A (en) 1978-07-27 1978-07-27 Carrier wave reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9181178A JPS5518171A (en) 1978-07-27 1978-07-27 Carrier wave reproducing device

Publications (2)

Publication Number Publication Date
JPS5518171A true JPS5518171A (en) 1980-02-08
JPS5759975B2 JPS5759975B2 (en) 1982-12-17

Family

ID=14037004

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9181178A Granted JPS5518171A (en) 1978-07-27 1978-07-27 Carrier wave reproducing device

Country Status (1)

Country Link
JP (1) JPS5518171A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450977A (en) * 1981-04-02 1984-05-29 The Dow Chemical Company Manufacture of draw-redraw cans using film laminated or extrusion coated steel sheet material
US4452375A (en) * 1981-04-02 1984-06-05 The Dow Chemical Company Manufacture of draw-redraw cans using steel sheet material film laminated or extrusion coated with a high density polyethylene graft copolymer
US4452374A (en) * 1981-04-02 1984-06-05 The Dow Chemical Company Manufacture of draw-redraw cans using an irradiated film laminated or extrusion coated steel sheet material
JPH0335824A (en) * 1989-07-03 1991-02-15 Nippon Steel Corp Method for deep drawing titanium sheet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0285610A (en) * 1988-09-22 1990-03-27 Matsushita Electric Ind Co Ltd Continuous discharge igniter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450977A (en) * 1981-04-02 1984-05-29 The Dow Chemical Company Manufacture of draw-redraw cans using film laminated or extrusion coated steel sheet material
US4452375A (en) * 1981-04-02 1984-06-05 The Dow Chemical Company Manufacture of draw-redraw cans using steel sheet material film laminated or extrusion coated with a high density polyethylene graft copolymer
US4452374A (en) * 1981-04-02 1984-06-05 The Dow Chemical Company Manufacture of draw-redraw cans using an irradiated film laminated or extrusion coated steel sheet material
JPH0335824A (en) * 1989-07-03 1991-02-15 Nippon Steel Corp Method for deep drawing titanium sheet

Also Published As

Publication number Publication date
JPS5759975B2 (en) 1982-12-17

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