Amplifier employing interleaved signals for PWM ripple suppression

摘要

An amplifier (300) having improved distortion characteristics is set forth. The amplifier comprises an interleaved amplifier section (305) adapted to generate an interleaved amplified output signal in response to a modified input signal (325) based on an input signal to be amplified. The amplifier also includes an interleaved PWM section (310) adapted to generate at least a first set of interleaved PWM pulse signals based on a first set of one or more phasing vectors. At least one of a first feedback circuit and a feedforward circuit generates a first feedback signal/feedforward signal in response to the at least first set of interleaved PWM pulse signals. One or more combiner circuits (355) generates the modified input signal (325) based on the first feedback signal /feedforward signal.