A control-theoretic approach for efficient design of filters in DAC and digital audio amplifiers

Konstantinos Tsakalis, Nikolaos Vlassopoulos, George Lentaris, Dionysios Reisis

Research output: Contribution to journalArticle

3 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)421-438
Number of pages18
JournalCircuits, Systems, and Signal Processing
Volume30
Issue number2
DOIs
StatePublished - Apr 1 2011

Keywords

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

ASJC Scopus subject areas

  • Signal Processing
  • Applied Mathematics

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