Patent ID: 9077299
Filing Date: 2015-07-07
Classification: H03F

Abstract:
1. A linearizer for a power amplifier, wherein (i) the linearizer receives an input signal and provides a corrected input signal to the power amplifier, and (ii) the power amplifier provides an output signal, the linearizer comprising: a spectrum monitor circuit that receives both the input signal and the output signal, wherein the spectrum monitor circuit provides a plurality of power level signals, and wherein each of the power level signals represents a power level for a corresponding range of frequencies in the input and output signals; a power detector that receives the input signal and provides an envelope signal representative of an instantaneous power of the input signal; a signal generating circuit that: (i) receives the input signal, a set of coefficients and the envelop signal from the power detector, and (ii) generates therefrom the corrected input signal, wherein a portion of the corrected input signal corresponds to a polynomial function of the envelope signal; and a controller that (i) receives the power level signals, and (ii) provides the set of coefficients.