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. 01, 2011
Filed:
Nov. 14, 2007
Ronald Duane Mccallister, Scottsdale, AZ (US);
Eric M. Brombaugh, Mesa, AZ (US);
Ronald Duane McCallister, Scottsdale, AZ (US);
Eric M. Brombaugh, Mesa, AZ (US);
Crestcom, Inc., Scottsdale, AZ (US);
Abstract
An RF transmitter () includes an RF amplifier () that experiences gain-droop distortion as a result of self-heating. A heat compensator () is included to insert a gain boost of an amount which is the inverse of the gain droop experienced by the RF amplifier (). The amount of gain boost is determined by generating a heat signal () from low-pass filtering () the squared magnitude () of a communication signal (). The heat signal () is scaled by a weighting signal () estimated by monitoring the amplified RF signal () at the output of the RF amplifier (). A nonlinear relationship section () then transforms the scaled signal into a gain-boost signal () that corresponds to the inverse of gain droop in the RF amplifier ().