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:
Jun. 26, 2001
Filed:
Oct. 27, 1999
Applicant:
Inventor:
Hisao Katoh, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/08 ;
U.S. Cl.
CPC ...
H03L 7/08 ;
Abstract
A phase comparator circuit reducing the effects of offset and jitter, and a data Phase Locked Loop circuit incorporating the phase comparator circuit. The phase comparator circuit includes a Delay Locked Loop circuit for outputting a delay, signal PLDTD with a delay according to an oscillation frequency of a voltage controlled oscillator, with respect to an input data PLDT, a D-type flip-flop for outputting a delay signal PLDTL by latching an input data PLCK according to an oscillation clock PLCK output from a voltage controlled oscillator, and a phase comparator for comparing phases of delay signals PLDTD and PLDTL.