Patent ID: 7251293
Filing Date: 2007-07-31
Classification: H03F

Abstract:
1. A method for reducing spurious emissions in an amplified signal by applying pre-distortion, whose magnitude is frequency-dependent, to an input signal to generate a pre-distorted signal, such that, when the pre-distorted signal is applied to an amplifier to generate the amplified signal, the pre-distortion reduces the spurious emissions in the amplified signal, wherein the pre-distorted signal is generated by: (a) generating a first frequency-dependent pre-distortion signal corresponding to a first set of frequency components for the input signal; (b) generating a second frequency-dependent pre-distortion signal corresponding to a second set of frequency components for the input signal, wherein the first set of frequency components is different from the second set of frequency components; and (c) combining the first and second frequency-dependent pre-distortion signals to generate the pre-distorted signal, wherein: