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:
Jan. 07, 2014
Filed:
Jul. 12, 2011
Tatsunori Usugi, Inagi, JP;
Daisuke Hamano, Hachioji, JP;
Tatsunori Usugi, Inagi, JP;
Daisuke Hamano, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a phase locked loop, frequency-divided clocks each of which is given a phase difference of at least one cycle of a feedback clock are inputted to a first phase comparator and a second phase comparator, respectively, which are made to perform phase comparison with a reference clock. Then, outputs of the first and second phase comparators are weighted by a result of the phase comparison of a receive signal and the feedback clock, and phase adjustment of the feedback clock is phase adjusted using the weighted outputs. Thereby, it is possible to lower a frequency of the reference clock and consequently to suppress power consumption.