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. 30, 2021
Filed:
Mar. 31, 2018
Apple Inc., Cupertino, CA (US);
Christian Wicpalek, Puchenau, AT;
Andreas Roithmeier, Munich, DE;
Andreas Leistner, Grasbrunn, DE;
Thomas Gustedt, Munich, DE;
Herwig Dietl-Steinmaurer, Wels, AT;
Tobias Buckel, Linz, AT;
Apple Inc., Cupertino, CA (US);
Abstract
A digital phase-locked loop has a digitally controlled oscillator with a first coarse tuning field for coarse tuning of the oscillator frequency, a second coarse tuning field for tuning of the oscillator frequency at finer intervals than the first coarse tuning field, and a fine tuning field for tuning the oscillator to an output frequency at finer intervals than the second coarse tuning field. The second coarse tuning field provides open loop tuning and is linear and connected parallel to the first coarse tuning field. The second coarse tuning field provides wide field temperature compensation and frequency error determination at start up based on an interpolated frequency value obtained prior to start up. Faster settling is provided with less complex algorithms.