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:
Oct. 27, 2020
Filed:
Oct. 04, 2019
Applicant:
Silicon Laboratories Inc., Austin, TX (US);
Inventors:
Timothy A. Monk, Hudson, NH (US);
Douglas F. Pastorello, Hudson, NH (US);
Assignee:
Silicon Laboratories Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/08 (2006.01); H03L 7/087 (2006.01); H03L 7/22 (2006.01); H03L 7/23 (2006.01); H03L 7/093 (2006.01); G01R 31/317 (2006.01);
U.S. Cl.
CPC ...
H03L 7/093 (2013.01); G01R 31/31709 (2013.01); H03L 7/0802 (2013.01);
Abstract
A spur target frequency is periodically determined to cancel a spur using a spur cancellation circuit in a first phase-locked loop (PLL) in a system with at least a second PLL that is in lock with the first PLL. The spur target frequency is periodically determined utilizing divide ratios of the first PLL and the second PLL to determine the updated spur target frequency. As one or more of the divide ratios change, the spur frequency changes and the spur target frequency is updated to reflect the change.