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:
Sep. 17, 2002
Filed:
Dec. 20, 2001
Applicant:
Inventors:
John Eisenberg, Los Altos, CA (US);
Steve Avis, Pleasanton, CA (US);
Assignee:
Spectrian Corporation, Sunnyvale, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/66 ; H03F 1/26 ; H03F 1/00 ;
U.S. Cl.
CPC ...
H03F 3/66 ; H03F 1/26 ; H03F 1/00 ;
Abstract
A closed loop, active cancellation technique (ACT)-based RF power amplifier linearization architecture injects a pilot tone as a 'pseudo distortion' signal into signal paths through first and second matched RF amplifiers, and a set of power minimization loops are closed around the RF amplifier pair. The power minimizing control loops control a set of vector modulators such that both the injected pilot tone and intermodulation distortion products are canceled, while RF carrier components constructively sum in the composite output of the two RF amplifiers.