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. 20, 2007
Filed:
Mar. 24, 2005
Raymond S. Pengelly, Hillsborough, NC (US);
E. James Crescenzi, Cambria, CA (US);
Simon M. Wood, Sunnyvale, CA (US);
Tom Stewart Dekker, Durham, NC (US);
Raymond S. Pengelly, Hillsborough, NC (US);
E. James Crescenzi, Cambria, CA (US);
Simon M. Wood, Sunnyvale, CA (US);
Tom Stewart Dekker, Durham, NC (US);
Cree, Inc., Durham, NC (US);
Abstract
A high power Doherty RF amplifier utilizes multi-stage amplifier modules for both the main amplifier and the peak amplifiers. In one embodiment of a two way two stage amplifier, the first stage of each amplifier module can include signal pre-distortion whereby the first stage compensates for distortion in both the first and second stages. The design is simple and results in a high efficiency amplifier with high gain. In one embodiment, a commercially available CREE PFM19030SM power module is used in both the main amplifier and the peak amplifier.