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:
Jul. 12, 2005
Filed:
Nov. 05, 2003
Applicants:
Kazuaki Oishi, Kawasaki, JP;
Hideki Ishida, Kawasaki, JP;
Inventors:
Kazuaki Oishi, Kawasaki, JP;
Hideki Ishida, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R023/02 ;
U.S. Cl.
CPC ...
Abstract
A frequency measurement circuit measures a frequency of an input signal. The frequency measurement circuit includes a frequency measurement unit for counting a reference clock during a counting period having a predetermined number of waves of the input signal. The frequency measurement unit counts the reference clock by using a lighter amount of weighting to each count at a starting time and an ending time of the counting period than the amount of weighting at the other times of the counting period.