Noise Shaping and PWM for Power D/a Conversion

Results from simulations of the performance of new topologies for digital audio power ampli ers are presented.Digital pulse width modulation is used in conjunction with noise shaping techniques to convert digital audio data directly into analogue power.Simple second order systems are analysed with the aim of determining appropriate system parameters for the construction of a prototypet l. introductionAlthough more and more of1he audio recordinyediting/p layback process is performed digitally, very little wo t to date has been reported on the use of digital techniques for the ram: conversion of digital audio data into analogue power.Earlier work [1][2][3] has shown that pulse width modulation (PWM) may be suitable for digital power ampli cation with no intermediate digital-to-analogue conversion stage.(See