Title :
Comparator-less digital implementation of AC-coupled ΣΔ A/D converters
Author :
Artigas, J.I. ; Urriza, I. ; Navarro, D. ; Barragán, L.A. ; Acero, J.
Author_Institution :
Dept. of Ing. Electron. y Comun., Univ. de Zaragoza, Zaragoza
Abstract :
A simple and successful design for a sigma-delta (SigmaDelta) modulator with only digital active components is presented. Low frequency compensation of the input threshold variations of the digital gate used as a comparator achieves good spurious-free dynamic range. The only drawback is the addition of a low cutoff frequency, which results in an AC-coupled analogue-to-digital converter.
Keywords :
comparators (circuits); logic design; logic gates; sigma-delta modulation; AC-coupled SigmaDelta A/D converter; analogue-to-digital converter; comparator-less digital implementation; digital active component; digital gate; sigma-delta modulator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.0273
