@conference{stewart2001digital, title = {Digital audio power amplifiers using Sigma Delta Modulation - Linearity problems in the class-D power stage}, author = {Stewart, Robert W. and Gruhler, Gerhard and Esslinger, Rolf}, booktitle = {Audio Engineering Society Convention 110}, month = {May}, year = {2001}, url = {https://www.aes.org/e-lib/browse.cfm?elib=10000} }