AUDIO AMPLIFIER

摘要

The embodiments described herein relate to amplifier circuits with power rails. The power rails are generated in response to an input signal, which will typically be an audio signal, and with a sufficient magnitude to power the amplifier and to generate an output signal corresponding to the input signal.

主权项

1. An audio signal amplifier comprising:
(a) an input terminal for receiving an input audio signal; (b) an output terminal; (c) a voltage control signal generator coupled to the input terminal, wherein the voltage control signal generator provides a voltage control signal consisting of one of a plurality of discrete voltage control signal levels; (d) a voltage regulator coupled to the regulator reference generator, wherein the voltage regulator provides a power signal corresponding to the voltage regulator reference; (e) a compensation block coupled to the input terminal to provide a modulation control signal based on the input signal; (f) a modulator coupled to the compensation block wherein the modulator provides a digital modulated signal in response to the modulation control signal; and (g) an output stage coupled to the modulator and the voltage regulator, wherein the output stage provides an output audio signal at the output terminal by combining the digital modulated signal and the power signal.