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:
May. 07, 2002
Filed:
Dec. 22, 1998
Andrew Bowen, San Jose, CA (US);
David L. Dignam, Belmont, CA (US);
Nathaniel D. Naegle, Pleasanton, CA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A system and method for the phase alignment of signals of arbitrary relative frequency are described. A phase difference detector detects a phase difference between a first signal pulse and a corresponding second signal pulse. A phase comparator compares this detected phase difference to a calculated expected phase difference, to produce an error signal proportional to the difference. The clock generator adjusts the frequency of one of the signals by an amount based on the error signal, in order to phase align the first signal to the second signal. In a preferred embodiment, the first and second signals are video signals with a common frame rate and different line rates.