TY - JOUR
TI - A control-theoretic approach for efficient design of filters in DAC and digital audio amplifiers
AU - Tsakalis, K.
AU - Vlassopoulos, N.
AU - Lentaris, G.
AU - Reisis, D.
JO - Circuits, Systems, and Signal Processing
PY - 2011
VL - 30
TODO - 2
SP - 421-438
PB - 
SN - 0278-081X, 1531-5878
TODO - 10.1007/s00034-010-9231-3
TODO - Control-theoretic approach;  Digital amplifiers;  Digital audio amplifiers;  Digital-to-analog converters;  Efficient designs;  Hardware complexity;  Modulation components;  Multimedia applications;  Output filters;  Over sampling;  Pulse generation;  Pulse width;  Signal to noise;  Switching rates;  Theoretical models, Algorithms;  Audio frequency amplifiers;  Computer simulation;  Digital integrated circuits;  Modulators;  Pulse generators;  Signal to noise ratio, Modulation
TODO - A control-theoretic approach in designing Digital-to-Analogue Converters and Digital Amplifiers which leads to improved performance in Audio and Multimedia applications is presented in this paper. The design involves an over-sampling and a pulse modulation component which is driven by a pulse generation algorithm based on the characteristics of the output filter. The theoretical model results in a family of digital circuits whose operation is verified by computer simulations achieving a performance of Signal-to-Noise Ratio of 147 dB at a switching rate of 90 MHz. Implementation and hardware complexity issues are discussed based on a FPGA realization of the algorithm. © 2010 Springer Science+Business Media, LLC.
ER -