Method and apparatus for a cartesian error feedback circuit to correct distortion within a power amplifier

Method and apparatus for a cartesian error feedback circuit to correct distortion within a power amplifier

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...

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Hauptverfasser: SMITH HOWARD JAMES, GRUNDLINGH JOHAN, NISBET JOHN, RABJOHN GORDON G
Format: Patent
Sprache:eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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creator SMITH HOWARD JAMES
GRUNDLINGH JOHAN
NISBET JOHN
RABJOHN GORDON G
description 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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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
title Method and apparatus for a cartesian error feedback circuit to correct distortion within a power amplifier
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