The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 2000
Filed:
Mar. 13, 1998
Norio Nakamura, Yokohama, JP;
Toshio Shiramatsu, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A phase-locked loop circuit and recording/reproducing apparatus of this invention include a distributor (11) for receiving reproduction data to distribute and output it as n reproduction data, a phase comparator group (6) having n phase comparators for sequentially receiving the distributed reproduction data to compare the phases of the reproduction data with that of a reproduction clock, a frequency comparator (5) for receiving a reference clock and the reproduction clock to compare their frequencies, a selector (7) for receiving a switching control signal, the phase comparison result, and the frequency comparison result, and selecting either one of the phase comparison result and the frequency comparison result to output the selected one as a voltage signal, a charge pump (8) for receiving the voltage signal and converting it into a current signal to output the current signal, a loop filter (9) for receiving the current signal to output a low-frequency voltage signal, and a VCO (10) for receiving the low-frequency voltage signal to output a reproduction clock having a corresponding frequency.