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. 04, 2010
Filed:
Jun. 01, 2007
Jean-paul Decruyenaere, Ottawa, CA;
Ralph Mason, Ottawa, CA;
Anita Netherton, Ottawa, CA;
SMSC Holdings SARL, Luxembourg, LU;
Abstract
Systems and methods related to digital frequency locked looping to synchronize frequencies between the local signal from a local oscillator and a reference clock signal from a remote oscillator. A reference counter increments its count for every pulse in the reference clock signal. The value in the reference counter is compared to a configurable reference value. Whenever a match between the reference counter value and the reference value occurs, a hit signal is generated and the reference counter value is reinitialized. Concurrent with the above, a feedback counter increments for every pulse from the local signal. When the hit signal is generated, the value in the feedback counter is compared to a configurable feedback value (by subtraction) to generate a difference value. The difference value is then converted to a frequency adjust signal for use in either increasing or decreasing the frequency of the local oscillator. The hit signal also reinitializes the feedback counter.