Patent Document ID: 7834688
Application ID: 11960988
Patent Flag: 1

Claim One:
1. Apparatus for amplifying a signal comprising: a) an input to receive an input signal; b) a splitter to split the input signal into a main signal and a reference signal; c) a predistorter to process the main signal; d) an amplifier to amplify the main signal to produce an amplified main signal; e) a processor to subtract the reference signal from a sample of the main signal to produce an error signal representative of residual errors in the main signal after amplification; f) a trainer to train the predistorter to more accurately model the amplifier's characterstics, the trainer training the predistorter using the error signal; g) an error amplifier to amplify the error signal to produce an amplified error signal; and h) a differentiator to subtract the amplified error signal from the amplified main signal to produce an output signal.