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. 20, 2004
Filed:
Aug. 25, 1999
Applicant:
Inventors:
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/24 ;
U.S. Cl.
CPC ...
H03D 3/24 ;
Abstract
A clock identification and reproduction circuit which synchronizes a clock signal with an input signal includes a voltage controlled generator for generating a clock signal, a phase comparator for detecting a phase difference between an input signal and a clock signal to generate a phase difference signal according to the phase difference, and a filter for synchronizing a clock signal of the voltage controlled generator in response to a phase difference signal, in which the phase comparator generates a phase difference signal when a specific pulse waveform of a pulse of an input signal changes.