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

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Abstract

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.

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Authors and Affiliations

  1. Electrical Engineering, Arizona State University, PO Box 875706, Tempe, AZ, 85287-5706, USA

    Konstantinos Tsakalis

  2. LORIA MAIA Team, INRIA Nancy-Grand Est, France

    Nikolaos Vlassopoulos

  3. Electronics Laboratory, Physics Department, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, 157 84, Greece

    George Lentaris & Dionysios Reisis

Authors
  1. Konstantinos Tsakalis
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  2. Nikolaos Vlassopoulos
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  3. George Lentaris
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  4. Dionysios Reisis
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Corresponding author

Correspondence to Dionysios Reisis.

Additional information

Partially supported by IST programme IST-1999-20380 (HIPRO) and project 70/4/4084 of the National and Kapodistrian University of Athens.

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Tsakalis, K., Vlassopoulos, N., Lentaris, G. et al. A Control-Theoretic Approach for Efficient Design of Filters in DAC and Digital Audio Amplifiers. Circuits Syst Signal Process 30, 421–438 (2011). https://doi.org/10.1007/s00034-010-9231-3

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  • DOI: https://doi.org/10.1007/s00034-010-9231-3

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