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  • Research Article
  • Open Access

Description of a 2-Bit Adaptive Sigma-Delta Modulation System with Minimized Idle Tones

EURASIP Journal on Advances in Signal Processing20072008:426502

  • Received: 3 June 2007
  • Accepted: 28 October 2007
  • Published:


A 2-bit adaptive sigma delta modulation system that inherently eliminates the idle tones present in conventional and other adaptive sigma delta systems is described. The system incorporates both memory and look-ahead instantaneous step-size estimations and, as shown by computer simulation results apart from eliminating the unwanted idle tones despite dithering, it offers improved SNR performance and extended dynamic range.


  • Information Technology
  • Computer Simulation
  • Quantum Information
  • Modulation System
  • Full Article

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Authors’ Affiliations

Laboratory of Electronics, Department of Physics, University of Athens, Panepistimiopolis, Athens, 157 84, Greece