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:
Apr. 08, 2008
Filed:
Oct. 23, 2006
Applicants:
Takahiro Yamaguchi, Tokyo, JP;
Masahiro Ishida, Tokyo, JP;
Mani Soma, Seattle, WA (US);
Inventors:
Assignee:
Advantest Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Timing jitter sequences Δφ[n] and Δφ[n] of respective clock signals under measurement x(t) and x(t) are estimated, and a timing difference sequence between those timing jitter sequences is calculated. In addition, initial phase angles φand φof linear instantaneous phases of the x(t) and x(t) are estimated, respectively. A sum of a difference between those initial angles and the timing difference sequence is calculated to obtain a clock skew sequence between the x(t) and x(t).