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:
Jul. 20, 2021
Filed:
Apr. 06, 2020
Movellus Circuits Incorporated, Ann Arbor, MI (US);
Frederick Christopher Candler, Toronto, CA;
Jeffrey Fredenburg, Ann Arbor, MI (US);
Movellus Circuits, Inc., Ann Arbor, MI (US);
Abstract
A method of operation in a locked-loop circuit. The locked-loop circuit includes a loop filter and a digitally-controlled oscillator (DCO) coupled to the output of the loop filter. The loop filter includes a first input to receive a digital word representing a difference between a reference clock frequency and a DCO output frequency. The method includes determining a calibration DCO codeword representing a calibration operating point for the locked-loop circuit; determining a scaling factor based on the calibration operating point, the scaling factor based on a ratio of an actual DCO gain to a nominal DCO gain; and applying the scaling factor to operating parameters of the loop filter.