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. 15, 2016
Filed:
Oct. 17, 2013
Cirrus Logic, Inc., Austin, TX (US);
Christophe Jean-Francois Amadi, Austin, TX (US);
Jason Lee Wardlaw, Austin, TX (US);
Emmanuel A. Marchais, Dripping Springs, TX (US);
Dylan Alexander Hester, Austin, TX (US);
Daniel John Allen, Austin, TX (US);
John Christopher Tucker, Austin, TX (US);
CIRRUS LOGIC, INC., Austin, TX (US);
Abstract
A DC servo loop may track DC offset changes of an input signal and apply feedback to amplifiers to adjust a DC offset of the input signal. The DC servo loop may include digital loop tracking and analog loop tracking components. The digital loop tracking components may track small changes in the DC offset. When the DC offset exceeds a certain threshold, analog loop tracking may be activated to apply feedback to the amplifiers to adjust the DC offset. The adjustments to the DC offset may be delayed until an amplitude of the input signal exceeds a threshold to reduce contribution to noise in the input signal.