Digital Audio Power Amplifiers using Sigma Delta Modulation Linearity Problems in the Class-D Power Stage

摘要

A completely digital audio power amplifier uses digital signals up to the power stage. Switching (class-D) powerstages, often MOSFETs, are used for amplification. In this paper we consider the linearity of a more realisticpower stage model with relatively high switching frequencies around 1MHz, as they may come from highresolution Sigma-Delta converters.