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:
Nov. 03, 2020
Filed:
Jun. 24, 2019
Applicant:
Silicon Laboratories Inc., Austin, TX (US);
Inventors:
Abdulkerim L. Coban, Austin, TX (US);
Wenhuan Yu, Austin, TX (US);
Mustafa H. Koroglu, Austin, TX (US);
Assignee:
Silicon Laboratories Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/08 (2006.01); H03K 21/00 (2006.01); H03K 3/03 (2006.01); H03L 7/099 (2006.01); H03H 11/04 (2006.01); H03H 11/12 (2006.01);
U.S. Cl.
CPC ...
H03L 7/0805 (2013.01); H03H 11/0472 (2013.01); H03H 11/1291 (2013.01); H03K 3/0315 (2013.01); H03K 21/00 (2013.01); H03L 7/0995 (2013.01); H03H 2210/04 (2013.01); H03H 2210/043 (2013.01);
Abstract
A calibration operation adjusts a frequency of a ring oscillator to a desired frequency by adjusting programmable RC circuits in the stages of the ring oscillator. The programmable RC circuits have programmable capacitors, resistors, or both. The RC circuits account for most of the delay through the ring oscillator. Another circuit with its own RC time constant is calibrated based on the adjustments made to the RC circuits in the ring oscillator to achieve the desired frequency.