JPS57195311A - Clock regenerating circuit - Google Patents

Clock regenerating circuit

Info

Publication number
JPS57195311A
JPS57195311A JP56079890A JP7989081A JPS57195311A JP S57195311 A JPS57195311 A JP S57195311A JP 56079890 A JP56079890 A JP 56079890A JP 7989081 A JP7989081 A JP 7989081A JP S57195311 A JPS57195311 A JP S57195311A
Authority
JP
Japan
Prior art keywords
circuit
clock
dropout
signal
vco
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
JP56079890A
Other languages
Japanese (ja)
Inventor
Isao Masuda
Kazunori Nishikawa
Yoshiki Iwasaki
Makoto Furumura
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
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP56079890A priority Critical patent/JPS57195311A/en
Publication of JPS57195311A publication Critical patent/JPS57195311A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels

Abstract

PURPOSE:To reduce deviation of a clock due to a dropout by detecting variation in the level of a clock signal component by a circuit which generates the clock signal from a digital playback signal, and making an input to the VCO in said circuit constant. CONSTITUTION:A signal having a frequency n-fold as high as a clock frequency fK extracted by a tank circuit 7 is supplied to the phase comparator 9 in a PLL14, and also supplied to an evelope detecting and comparator circuit 13. By the output signal of the circuit 13, a switch circuit 15 makes the connection between terminals (a) and (c) when no dropout is generated or between terminals (b) and (c) when a dropout is generated, thereby applying a constant voltage V to a VCO11 as a control voltage. Sharp voltage variation due to the switching is absorbed by an integral network 10. The application of the constant voltage results in the output of the VCO is set fixedly n-fold as high as the clock frequency.
JP56079890A 1981-05-26 1981-05-26 Clock regenerating circuit Pending JPS57195311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079890A JPS57195311A (en) 1981-05-26 1981-05-26 Clock regenerating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079890A JPS57195311A (en) 1981-05-26 1981-05-26 Clock regenerating circuit

Publications (1)

Publication Number Publication Date
JPS57195311A true JPS57195311A (en) 1982-12-01

Family

ID=13702854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079890A Pending JPS57195311A (en) 1981-05-26 1981-05-26 Clock regenerating circuit

Country Status (1)

Country Link
JP (1) JPS57195311A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003581A1 (en) * 1983-03-08 1984-09-13 Sony Corp Apparatus for reproducing data signal
JPS59190725A (en) * 1983-04-13 1984-10-29 Nec Corp Phase synchronizing circuit
JPS61120381A (en) * 1984-11-13 1986-06-07 デイジタル　イクイプメント　コーポレーシヨン Phase fixing loop for mfm data recording
JPS61164387A (en) * 1985-01-16 1986-07-25 Matsushita Electric Ind Co Ltd Video signal processing device
JPS61234191A (en) * 1985-04-09 1986-10-18 Matsushita Electric Ind Co Ltd Color signal processor
EP0199584A2 (en) * 1985-04-22 1986-10-29 Sony Corporation Apparatus for reproducing a digital signal
JPH028234U (en) * 1988-06-30 1990-01-19
JPH06197014A (en) * 1992-12-25 1994-07-15 Mitsubishi Electric Corp Phase locked loop circuit
JP2009272766A (en) * 2008-05-01 2009-11-19 Fujitsu Ltd Phase comparator, phase-locked loop circuit, and phase-comparison control method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003581A1 (en) * 1983-03-08 1984-09-13 Sony Corp Apparatus for reproducing data signal
JPS59190725A (en) * 1983-04-13 1984-10-29 Nec Corp Phase synchronizing circuit
JPS61120381A (en) * 1984-11-13 1986-06-07 デイジタル　イクイプメント　コーポレーシヨン Phase fixing loop for mfm data recording
JPS61164387A (en) * 1985-01-16 1986-07-25 Matsushita Electric Ind Co Ltd Video signal processing device
JPS61234191A (en) * 1985-04-09 1986-10-18 Matsushita Electric Ind Co Ltd Color signal processor
EP0199584A2 (en) * 1985-04-22 1986-10-29 Sony Corporation Apparatus for reproducing a digital signal
US4737866A (en) * 1985-04-22 1988-04-12 Sony Corporation Apparatus for reproducing a digital signal
JPH028234U (en) * 1988-06-30 1990-01-19
JPH06197014A (en) * 1992-12-25 1994-07-15 Mitsubishi Electric Corp Phase locked loop circuit
JP2009272766A (en) * 2008-05-01 2009-11-19 Fujitsu Ltd Phase comparator, phase-locked loop circuit, and phase-comparison control method

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