✦ LIBER ✦

A design of ΔΣ A-D converter

✍ Scribed by Etsuro Hayahara; Ken'Ichi Aoki; Satoshi Hirano

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 416 KB
Volume: 90
Category: Article
ISSN: 1042-0967
DOI: 10.1002/ecjc.20269

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The ΔΣ modulation A‐D converter is widely used in practice as a high‐resolution A‐D converter suitable for LSI implementation. However, in general, if the order of the loop filter in the ΔΣ modulation A‐D converter exceeds three, stability of the circuit is no longer guaranteed. In this paper, the relationship of the loop filter coefficients in the A‐D converter is studied. Based on the results, a design method is proposed for a higher‐order ΔΣ modulation A‐D converter such that stability is assured while maximizing the signal‐to‐noise (SN) ratio. Further, the results of a PSPICE simulation and experimental results obtained using individual components confirm that the present design method is sufficiently practical. © 2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 3, 90(6): 10– 16, 2007; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/ecjc.20269

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