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:
May. 12, 2020
Filed:
Jan. 16, 2019
Applicant:
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Inventors:
Assignee:
Cirrus Logic, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/38 (2006.01); H03F 1/02 (2006.01); H03F 1/56 (2006.01); H03F 3/183 (2006.01); H03F 3/217 (2006.01); H03G 3/30 (2006.01); H03F 1/30 (2006.01); H03F 1/32 (2006.01); H03F 3/187 (2006.01); H03M 1/08 (2006.01); H03M 1/66 (2006.01);
U.S. Cl.
CPC ...
H03F 1/0233 (2013.01); H03F 1/30 (2013.01); H03F 1/3247 (2013.01); H03F 1/3264 (2013.01); H03F 1/56 (2013.01); H03F 3/183 (2013.01); H03F 3/187 (2013.01); H03F 3/217 (2013.01); H03F 3/2171 (2013.01); H03F 3/2175 (2013.01); H03G 3/3005 (2013.01); H03G 3/3089 (2013.01); H03M 1/08 (2013.01); H03F 2200/03 (2013.01); H03F 2200/351 (2013.01); H03F 2200/387 (2013.01); H03F 2200/391 (2013.01); H03F 2200/421 (2013.01); H03F 2200/459 (2013.01); H03F 2201/3233 (2013.01); H03M 1/66 (2013.01);
Abstract
Resistor mismatch may be digitally compensated based on a known resistor mismatch, power supply information, and/or other operating parameters of the amplifier. The digital compensation may be applied to the digital input signal before conversion for processing and amplification in the analog domain. An amplifier with digital compensation for resistor mismatch may be used in a class-D amplifier with a closed loop and feedforward feedback. A class-D or other amplifier with digital compensation may be integrated with electronic devices such as mobile phones.