A Control-Theoretic Approach for Efficient Design of Filters in DAC and Digital Audio Amplifiers

作者：Tsakalis Konstantinos; Vlassopoulos Nikolaos; Lentaris George; Reisis Dionysios^*

来源：Circuits, Systems, and Signal Processing, 2011, 30(2): 421-438.

DOI：10.1007/s00034-010-9231-3

• Pulse width modulation
• Delta modulation
• Digital-to-analog converters

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.

• 出版日期2011-4
• 单位INRIA