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:
Feb. 17, 2004
Filed:
Mar. 19, 2002
George W. Alexander, Durham, NC (US);
Jinhwan Lee, Raleigh, NC (US);
Infineon Technologies AG, Munich, DE;
Abstract
A delay lock loop circuit includes a forward delay circuit having a plurality of delay elements. Each delay element has a delay time of one unit delay time. The forward delay circuit and each of the delay elements are powered by a supply voltage. The supply voltage is set to thereby set the duration of a unit delay time. Moreover, a feedback delay circuit is provided in order to cause a feedback delay time being substantially equal to a propagation delay of the IC. As the operating conditions of IC change, and the propagation delay thereof increases or decreases, the feedback delay time changes accordingly, and thus the delay caused by forward delay circuit tracks the change in the propagation delay of the IC.