Patent ID: 8995691
Filing Date: 2015-03-31
Classification: H03F,H04R

Abstract:
1. An audio signal amplifier comprising: an input terminal for receiving an input audio signal; an output terminal; a voltage control signal generator coupled to the input terminal, wherein the voltage control signal generator provides a voltage control signal based on the input audio signal, wherein the voltage control signal consists of one of a plurality of discrete voltage control signal levels; a voltage regulator coupled to the voltage control signal generator, wherein the voltage regulator provides a power signal corresponding to the voltage control signal and capable of providing the power signal corresponding to any one of the plurality of discrete voltage control signal levels; a compensation block coupled to the input terminal to provide a modulation control signal based on the input signal; a modulator coupled to the compensation block wherein the modulator provides a digital modulated signal in response to the modulation control signal; and an output stage coupled to the modulator and the voltage regulator, wherein the output stage provides an output audio signal at the output terminal based on the digital modulated signal and the power signal.