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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
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.
Document Type
Journal Article
Date of this Version

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

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  • analog to digital converter,
  • adc,
  • sigma-delta conveter,
  • sigma-delta modulator,
  • sampling,
  • quantization
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)
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