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:
Mar. 19, 2019
Filed:
Apr. 25, 2018
Applicant:
Microsemi Semiconductor Ulc, Kanata, CA;
Inventors:
Qu Gary Jin, Kanata, CA;
Chao Zhao, Kanata, CA;
Assignee:
Microsemi Semiconductor ULC, Kanata, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03B 21/00 (2006.01); G06F 1/12 (2006.01); H03L 7/099 (2006.01); H03L 7/093 (2006.01); H03L 7/07 (2006.01);
U.S. Cl.
CPC ...
G06F 1/12 (2013.01); H03L 7/07 (2013.01); H03L 7/093 (2013.01); H03L 7/0991 (2013.01); H03L 2207/50 (2013.01);
Abstract
A clock synthesizer for synthesizing an output clock locked to a selected reference clock input has a pair of phase locked loops locked to respective reference clock inputs first generating first and second frequencies. One of the frequencies is selected to control a controlled oscillator for generating an output clock. The frequency offset between the first and second frequencies at the time of switching is stored and added to the frequency controlling the controlled oscillator.