Advertisement

Look-Ahead Based Sigma-Delta Modulation

  • Erwin Janssen
  • Arthur van Roermund

Part of the Analog Circuits and Signal Processing book series (ACSP)

Table of contents

  1. Front Matter
    Pages I-XII
  2. Erwin Janssen, Arthur van Roermund
    Pages 1-3
  3. Erwin Janssen, Arthur van Roermund
    Pages 5-28
  4. Erwin Janssen, Arthur van Roermund
    Pages 29-41
  5. Erwin Janssen, Arthur van Roermund
    Pages 43-48
  6. Erwin Janssen, Arthur van Roermund
    Pages 49-75
  7. Erwin Janssen, Arthur van Roermund
    Pages 77-101
  8. Erwin Janssen, Arthur van Roermund
    Pages 103-136
  9. Erwin Janssen, Arthur van Roermund
    Pages 137-157
  10. Erwin Janssen, Arthur van Roermund
    Pages 159-177
  11. Erwin Janssen, Arthur van Roermund
    Pages 179-203
  12. Erwin Janssen, Arthur van Roermund
    Pages 205-223
  13. Erwin Janssen, Arthur van Roermund
    Pages 225-237
  14. Erwin Janssen, Arthur van Roermund
    Pages 239-240
  15. Back Matter
    Pages 241-247

About this book

Introduction

High resolution analog-to-digital conversion and digital-to-analog conversion is often realized with the use of a Sigma-Delta Modulator (SDM). The sigma-delta modulation process, although very non-linear when a 1-bit quantizer is used, is nowadays well understood and can be made to deliver a very high signal conversion quality. An example system that pushes the traditional sigma-delta modulation algorithm to its performance limit is the Super Audio CD (SA-CD) standard, in which a 64 times oversampled 1-bit signal is used to represent audio content with an SNR of up to 120~dB over 20~kHz bandwidth.

 Look-Ahead Based Sigma-Delta Modulation presents a number of alternative digital sigma-delta modulation techniques that make use of look-ahead, a process that takes into account the effect of decisions on the future, to realize an even higher conversion quality than possible with traditional sigma-delta modulation.

This book provides the reader with a clear overview of various encoding techniques and demonstrates the improvements in signal conversion quality that can be obtained from their use. Starting from the basic full look-ahead approach that requires several orders of magnitude more computational power than a normal SDM, more efficient structures are derived that are able to realize a far higher signal conversion performance at a fraction of the computational cost. In addition to this, a modulator is derived that is able to generate bitstreams that are optimized for SA-CD usage, i.e. a high signal conversion quality combined with minimal signal entropy.

All the look-ahead algorithms presented in this book are described in pseudocode and ample simulation results are provided to judge the effects on the signal conversion performance.

Keywords

Analog Circuit Design Data Converters Digital Circuit Design Sigma Delta Modulators

Authors and affiliations

  • Erwin Janssen
    • 1
  • Arthur van Roermund
    • 2
  1. 1.Central R&D, Mixed Signal Circuits & SystemsNXP SemiconductorsEindhovenNetherlands
  2. 2.Electrical Engineering, Mixed-signal Microelectronics GroupTechnical University EindhovenEindhovenNetherlands

Bibliographic information

  • DOI https://doi.org/10.1007/978-94-007-1387-1
  • Copyright Information Springer Science+Business Media B.V. 2011
  • Publisher Name Springer, Dordrecht
  • eBook Packages Engineering
  • Print ISBN 978-94-007-1386-4
  • Online ISBN 978-94-007-1387-1
  • Buy this book on publisher's site
Industry Sectors
Pharma
Automotive
Biotechnology
Electronics
IT & Software
Telecommunications
Energy, Utilities & Environment
Aerospace
Engineering