Low cost, pilotless, feed forward compensation for a power...

Details Low cost, pilotless, feed forward compensation for a power... Low cost, pilotless, feed forward compensation for a power...

H - Electricity

03

F

H03F 1/32 (2006.01)

Patent

CA 2289128

The invention relates to a low cost feed forward RF power amplifier arrangement for amplifying an RF input signal using a main power amplifier operating as a class A/B amplifier. The method and apparatus modify the input signal to the main amplifier to compensate for the distortion added by the main power amplifier. The circuit provides for injecting a delayed version of the input signal, through a fixed gain-phase circuity, at a point whereby the resulting signal is amplified by the error amplifier of the second loop. A digitally controlled processor iteratively modifies various phase and gain controls to adjust the output of the amplifier. Different gain and phase control lines are iteratively updated at different rates.

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