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:
Jun. 01, 2004
Filed:
Jun. 20, 2002
Guang Fei Zhang, St. Laurent, CA;
Xing Wang, Dollard-des-Ormeaux, CA;
Fabio Concilio, Dollard-des-Ormeaux, CA;
Tjo San Jao, Beaconsfield, CA;
Harris Corporation, Melbourne, FL (US);
Abstract
A novel linearization apparatus for reducing power amplifier distortion does not require delay lines. The apparatus includes a power amplifier and an error generator. The signals provided by the error generator (error signal) and the power amplifier are combined to subtract out the distortion introduced by the power amplifier. The error generator includes two auxiliary amplifiers, wherein one of the auxiliary amplifiers is operated in it saturated region and the other is operated in its non-saturated region. The power amplifier and the two auxiliary amplifiers have the same distortion characteristics and receive the same input signal. The auxiliary amplifier operating in its saturated region introduces distortion and the auxiliary amplifier operating in its non-saturated region does not introduce distortion. The two signals provided by the auxiliary amplifiers are combined to produce an error signal having a distortion component that is an approximate replica of the power amplifier distortion.