Departmental Papers (ESE)

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

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Date Posted: 11 August 2005

This document has been peer reviewed.