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  • Research Article
  • Open Access

A Multiplierless DC-Blocker for Single-Bit Sigma-Delta Modulated Signals

EURASIP Journal on Advances in Signal Processing20062007:018361

  • Received: 11 February 2006
  • Accepted: 10 September 2006
  • Published:


The DC content in single-bit domain is both undesirable and hard to remove. In this paper we propose a single-bit multiplierless DC-blocker structure. The input is assumed to be sigma-delta modulated bitstream. This DC-blocker is designed using a delta modulator topology with a sigma-delta modulator (SDM) embedded in its feedback path. Its performance is investigated in terms of the overall signal-to-noise ratio, the effectiveness of DC removal, and the stability. The proposed structure is efficient for hardware realisation.


  • Information Technology
  • Quantum Information
  • Feedback Path
  • Hardware Realisation
  • Modulator Topology

Authors’ Affiliations

School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria, 3001, Australia
School of Engineering Systems, Queensland University of Technology, Brisbane, Qld, 4001, Australia


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© Amin Z. Sadik et al. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.