Besides pulse width modulation, sigma delta modulation is an other way to build class D amplifiers. With modern power MOSFETs and high-speed drivers, it is possible to run a switching amplifier at frequencies beyond 1 MHz. In this paper the nonlinear effects of such an amplifier will be discussed and possibilities to reduce distortion in amplifiers with analog or digital sigma delta converters will be shown.

Author: Klugbauer-Heilmeier, Josef
AES Convention: 92 (March 1992) Paper Number: 3227
Publication Date: March 1, 1992
Subject: Digital Signal Processing

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