Patent ID: 6831511
Filing Date: 2004-12-14
Classification: H03F

Abstract:
An apparatus for improving linearity of an RF signal comprising:a splitter configured to receive an input RF signal, and configured to split said input RF signal into two RF signals comprising a first input RF signal, and a second input RF signal; an over-biased non-linear RF power amplifier configured to receive said first input RF signal and configured to generate an over-biased non-linear output signal having an over-biased non-linear distortion component; said over-biased non-linear RF power amplifier configured to receive an over-biased DC signal being greater than an optimum bias DC voltage; an under-biased non-linear RF power amplifier configured to receive said second input RF signal and configured to generate an under-biased non-linear output signal having an under-biased non-linear distortion component; said under-biased non-linear RF power amplifier configured to receive an under-biased DC signal being lower than said optimum bias DC voltage; and a combiner electrically communicating with said over-biased non-linear RF power amplifier, and electrically communicating with said under-biased non-linear RF power amplifier; said combiner configured to combine said over-biased non-linear output signal and said under-biased non-linear output signal.