Patent ID: 8213883

Claim:
A signal processor for linearizing a non-linear circuit through pre-distortion of an input signal to form a pre-distorted input signal, the non-linear circuit processing the pre-distorted input signal to provide an output signal, comprising: a first coupler for extracting a version of the input signal, wherein a remaining portion of the input signal not extracted by the first coupler is provided to a first node; a mixer for multiplying the version of the input signal with a pre-distortion signal to produce an additive signal, the pre-distortion signal having a relatively small or zero constant component such that the additive signal includes either no linear version of the input signal or a linear version of the input signal that has a lower power than the remaining portion of the input signal; and a second coupler to add the additive signal to the remaining version of the input signal at the first node to form the pre-distorted input signal, whereby the output signal is substantially linearly related to the input signal.