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. 30, 2010
Filed:
May. 15, 2007
Johan Grundlingh, Kinburn, CA;
Howard James Smith, Bishop's Stortford, GB;
John Nisbet, Nepean, CA;
Gordon G. Rabjohn, Ottawa, CA;
Johan Grundlingh, Kinburn, CA;
Howard James Smith, Bishop's Stortford, GB;
John Nisbet, Nepean, CA;
Gordon G. Rabjohn, Ottawa, CA;
SiGe Semiconductor Inc., Ottawa, Ontario, CA;
Abstract
A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining baseband error signals with the appropriate phase shift with baseband input signals, the baseband error signals generated by subtractively combining delayed fed-forward portions of the baseband input signals with baseband converted portions of a fed-back amplified output signal, the amplified output signal being a distorted replica of combined up-converted baseband input signals. The baseband error signals being filtered prior to the combining function, and also providing inputs to a controller which adjusts active elements of the amplification and fed-back paths in order to minimize the distortion within the output of the amplifier.