Method and apparatus for distortion correction of RF amplifiers
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United States of America Patent
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Issued Date -
Nov 27, 2008
app pub date -
May 25, 2007
filing date -
May 25, 2007
priority date (Note) -
Abandoned
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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.
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