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Article
An Overview of Sigma-Delta Converters: How a 1-bit ADC achieves more than 16-bit resolution
Departmental Papers (ESE)
  • Pervez M Aziz, Bell Laboratories
  • Henrik V Sorensen, Ariel Corporation
  • Jan Van der Spiegel, University of Pennsylvania
Document Type
Journal Article
Date of this Version
1-1-1996
Comments

Copyright 1996 IEEE. Reprinted from IEEE Signal Processing Magazine, Volume 13, Issue 1, September 1996, pages 61-84.

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Abstract

This article briefly describes conventional A/D conversion, as well as its performance modeling. We then look at the technique of oversampling, which can be used to improve the resolution of classical A/D methods. We discuss how sigma-delta converters use the technique of noise shaping in addition to oversampling to allow high resolution conversion of relatively low bandwidth signals. Next, we examine the use of sigma-delta converters to convert narrowband bandpass signals with high resolution. Several parallel sigma-delta converters, which offer the potential of extending high resolution conversion to signals with higher bandwidths, are also described.

Keywords
  • analog to digital converter,
  • adc,
  • sigma-delta conveter,
  • sigma-delta modulator,
  • sampling,
  • quantization
Disciplines
Citation Information
Pervez M Aziz, Henrik V Sorensen and Jan Van der Spiegel. "An Overview of Sigma-Delta Converters: How a 1-bit ADC achieves more than 16-bit resolution" (1996)
Available at: http://works.bepress.com/jan_vanderspiegel/18/