A. Boni et C. Morandi, HARMONIC DISTORTION IN HIGH-SPEED DIFFERENTIAL A D CONVERTERS/, IEEE transactions on circuits and systems. 2, Analog and digital signal processing, 45(3), 1998, pp. 403-406
The brief discusses the harmonic distortion introduced by the differen
tial input adapter commonly used in hash and folding A/D converters op
erating without Sample and Hold. A distributed model of the adapter is
proposed, which provides physical insight and allows quantitative eva
luation. Moreover, a technique based on a feedforward compensation is
presented. It provides a significant reduction of the harmonic distort
ion with a small increase of the die area.