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. 31, 2011
Filed:
Sep. 02, 2009
Applicants:
Lorenzo Crespi, Costa Mesa, CA (US);
Ketan B Patel, Lake Forest, CA (US);
Kyehyung Lee, Irvine, CA (US);
Inventors:
Lorenzo Crespi, Costa Mesa, CA (US);
Ketan B Patel, Lake Forest, CA (US);
Kyehyung Lee, Irvine, CA (US);
Assignee:
Conexant Systems, Inc., Newport Beach, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
Class-D amplifiers have evolved from using binary pulse-width modulation (PWM) modulators to three-level PWM modulators. Three-level PWM drivers for audio applications offer the benefits of eliminating costly elements at the output of an audio system. However, they also introduce increased common-mode interference. Three-level PWM generates three states, but one state has two interchangeable representations which can be scrambled in order to shape the common-mode output spectrum.