JPS6486717A - Phase locked loop circuit - Google Patents

Phase locked loop circuit

Info

Publication number
JPS6486717A
JPS6486717A JP62245107A JP24510787A JPS6486717A JP S6486717 A JPS6486717 A JP S6486717A JP 62245107 A JP62245107 A JP 62245107A JP 24510787 A JP24510787 A JP 24510787A JP S6486717 A JPS6486717 A JP S6486717A
Authority
JP
Japan
Prior art keywords
phase
frequency divider
frequency
output
clearing
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
JP62245107A
Other languages
Japanese (ja)
Inventor
Tetsuo Ishiwatari
Hitoshi Furumae
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62245107A priority Critical patent/JPS6486717A/en
Priority to US07/248,799 priority patent/US5068752A/en
Priority to DE88308932T priority patent/DE3883907T2/en
Priority to KR1019880012485A priority patent/KR920008110B1/en
Priority to EP88308932A priority patent/EP0310330B1/en
Publication of JPS6486717A publication Critical patent/JPS6486717A/en
Pending legal-status Critical Current

Links

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To shorten a phase leading-in time by clearing the count of a frequency divider in case of a considerable deviation between the phase of an input signal and that of the frequency divider output and releasing this clearing at the next phase lock point. CONSTITUTION:A voltage proportional to the phase difference between an input signal and the output of a frequency divider 5 is outputted by a phase comparator 1 and has a high frequency component eliminated by a low-pass filter 3, and the oscillation frequency of a voltage controlled oscillator 4 is controlled by the output voltage of the low-pass filter 3, and the frequency divider 5 divides the frequency of the output of the voltage controlled oscillator 4. If phase deviation is detected by a phase deviation detecting part 2, the count of the fre quency divider 5 is cleared, and this clearing is released at the next phase lock point to start counting of the frequency divider 5 again. Thus, the phase leadingin time at the time of operation start is shortened even in case of a PLL circuit which has the frequency divider having a high frequency division ratio in the feedback loop.
JP62245107A 1987-09-29 1987-09-29 Phase locked loop circuit Pending JPS6486717A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62245107A JPS6486717A (en) 1987-09-29 1987-09-29 Phase locked loop circuit
US07/248,799 US5068752A (en) 1987-09-29 1988-09-26 Apparatus for recording/reproducing a digital audio signal with a video signal
DE88308932T DE3883907T2 (en) 1987-09-29 1988-09-27 Device for recording and reproducing digital signals.
KR1019880012485A KR920008110B1 (en) 1987-09-29 1988-09-27 Digital signal recording and reproducing device
EP88308932A EP0310330B1 (en) 1987-09-29 1988-09-27 Digital signal recording/reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62245107A JPS6486717A (en) 1987-09-29 1987-09-29 Phase locked loop circuit

Publications (1)

Publication Number Publication Date
JPS6486717A true JPS6486717A (en) 1989-03-31

Family

ID=17128721

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62245107A Pending JPS6486717A (en) 1987-09-29 1987-09-29 Phase locked loop circuit

Country Status (1)

Country Link
JP (1) JPS6486717A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0575454A (en) * 1991-09-13 1993-03-26 Sanyo Electric Co Ltd Pll circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115391A (en) * 1974-07-29 1976-02-06 Tokyo Shibaura Electric Co

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115391A (en) * 1974-07-29 1976-02-06 Tokyo Shibaura Electric Co

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0575454A (en) * 1991-09-13 1993-03-26 Sanyo Electric Co Ltd Pll circuit

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