Patent ID: 6211733
Filing Date: 2001-04-03
Classification: H03F

Abstract:
An amplifier arrangement for amplifying an input signal with which a distortion cancelling input is combined, said amplifier arrangement comprising:a main amplifier,a predistortion circuitry having an output connected to the main amplifier, anda feedback loop includinga comparator which differences a delayed derivative of said input signal to said amplifier arrangement with a signal representative of the output of said main amplifier to provide an error signal;an energy detector for receiving said error signal and generating a detected energy error signal output;a peak-to-peak detector for receiving said error signal and generating a peak-to-peak error signal output,a controller responsive to the detected energy signal output and the peak-to-peak error signal output for generating correction signals, said predistortion circuitry being responsive to at least a portion of said correction signals for modifying its output to the main amplifier, anda control circuitry, for receiving the input signal and delivering it to the predistortion circuitry,said control circuitry being responsive to at least a peak-to-peak value portion of the output of the error signal for reducing the peak-to-peak signal value of said error signal.