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. 05, 2004
Filed:
Feb. 12, 2003
Tomonari Aoki, Kanagawa, JP;
Kazuhiro Nakajima, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A phase comparator is disclosed that can provide a phase comparison result at high speed that essentially does not vary according a power source voltage, ambient temperature and/or manufacturing process conditions, or the like. A phase comparator ( ) may include one-shot pulse generating units ( and ) that output one-shot pulses according to input data signal DAT and clock signal CLK, respectively. An R-S flip-flop ( ) can receive one-shot pulses from one-shot pulse generating units ( and ) at set and reset inputs, respectively. An output flip-flop ( ) can select between an output signal of R-S flip-flop ( ) and a delay signal “a8” generated from input data signal DAT, and latch such a result according to a delayed clocks signal CLK.