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. 10, 2011
Filed:
Dec. 17, 2008
William C. Plants, Campbell, CA (US);
Nikhil Mazumder, San Jose, CA (US);
Arunangshu Kundu, San Jose, CA (US);
James Joseph, Monument, CO (US);
Wayne W. Wong, Sunnyvale, CA (US);
William C. Plants, Campbell, CA (US);
Nikhil Mazumder, San Jose, CA (US);
Arunangshu Kundu, San Jose, CA (US);
James Joseph, Monument, CO (US);
Wayne W. Wong, Sunnyvale, CA (US);
Actel Corporation, Mountain View, CA (US);
Abstract
A DLL provides a deskew mode for aligning a reference clock that passes through a clock distribution tree to a feedback by adding additional delay to the feedback clock to align the feedback clock with reference clock at one cycle later. A 0 ns clock-to-out mode is provided by adding additional delay to account for an input buffer into a feedback path. The feedback clock can be doubled by a clock doubler with 50% duty cycle adjustment disposed in the feedback path. Flexible timing is aligning the reference clock to the feedback clock is obtained with additional delay elements disposed in the feedback and reference clock paths.