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:
Jan. 02, 2007
Filed:
Sep. 10, 2004
Gary P. Mcclannahan, Rochester, MN (US);
Daniel P. Wetzel, Rochester, MN (US);
Gary M. Lippert, Kasson, MN (US);
Gary P. McClannahan, Rochester, MN (US);
Daniel P. Wetzel, Rochester, MN (US);
Gary M. Lippert, Kasson, MN (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A delay line calibration circuit and method are provided in which a programmable master delay line drives a delay clock and has a propagation delay that is a function of a delay setting. A delay counter is clocked by the delay clock and has a delay count. A reference counter is clocked by a reference clock and has a reference count. A control circuit controls the delay and reference counters, compares a representation of the delay count to a representation of the reference count and responsively generates a modified value for the delay setting to reduce a difference between the representations of delay count and the reference count.