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:
Dec. 23, 2003
Filed:
Sep. 20, 2002
Paul Joseph Kramer, Fort Collins, CO (US);
Jered Michael Sandner, Wellington, CO (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A frequency divider circuit utilizes an asynchronous slip request signal to provide an output clock signal according to a programmable divide ratio “R”. A high frequency input clock signal has a frequency divided by a first factor to produce a divided signal when a slip signal is inactive. The output clock signal is produced by functionally dividing the frequency of the divided signal by a second factor. The second factor is determined by the programmable divide ratio divided by the first factor such that the frequency of the output clock signal is related to the frequency of the input clock signal and the programmable divide ratio. An asynchronous slip request signal is generated when the programmable divide ratio is a non-multiple of the first factor. The asynchronous slip request signal activates the slip signal such that a transition of the divided signal is skipped.