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. 10, 2008
Filed:
May. 22, 2003
Mitsuo Baba, Tokyo, JP;
Mitsuo Baba, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A phase comparator has a flip-flop circuit and a logic circuit. The flip-flop circuit compares an input clock signal with a leading edge and a trailing edge of an input data signal to produce a leading phase comparison result signal indicative of a leading phase comparison result related to the leading edge of the input data signal and a trailing phase comparison result signal indicative of a trailing phase comparison result related to the trailing edge of the input data signal. The logic circuit produces an output up signal when both of the leading and the trailing phase comparison result signals indicate a lag phase of the input clock signal. The logic circuit produces an output down signal when both of the leading and the trailing phase comparison result signals indicate a lead phase of the input clock signal.