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:
Aug. 07, 2012
Filed:
Jul. 07, 2010
Xicheng Jiang, Irvine, CA (US);
Jianlong Chen, Irvine, CA (US);
Xicheng Jiang, Irvine, CA (US);
Jianlong Chen, Irvine, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Disclosed is a high efficiency amplifier operable to substantially reduce electromagnetic interference (EMI). The high efficiency amplifier comprises an output stage to provide a high powered signal to a load. The high efficiency amplifier further comprises an overlap protection circuit to produce a timing non-overlap in a control signal for the output stage, and an edge control circuit to reduce a transient portion of the high powered signal to substantially reduce the EMI. The overlap protection circuit and the edge control circuit may be implemented with resistive source degeneration. Also disclosed is a related method. In one embodiment, the high efficiency amplifier and the related method may be incorporated into a cellular telephone or a mobile audio device.