Patent ID: 6437644
Filing Date: 2002-08-20
Classification: H03F

Abstract:
A predistorter arrangement for linearising an amplifier, the predistorter arrangement comprising an input signal path for receiving an input signal which is required to be amplified, a distortion path in which the input signal from the input signal path is processed to generate a distortion signal comprising at least one distortion component which is a third order or higher order component of the input signal, a combiner for combining the distortion signal with the input signal in the input signal path to produce a predistorted input signal which is supplied to the amplifier input, and an error corrector in which the amplifier output signal is compared with the distortion signal from the distortation path to produce error correction signals for controlling the generation of at least one distortion component in the distortion path, wherein, for each distortion component for which an error correction signal is produced, the error corrector compares the distortion component individually with the amplifier output signal to produce the error correction signal for controlling the generation of that distortion component.