GaAs multibit delta-sigma A/D converters based upon a new comparator design

Abstract

In this paper, the design of multibit delta-sigma converters based upon a new comparator bank structure is described. The comparator bank approach eliminates the need for comparator threshold terminals, allowing each of the individual latched comparators to operate upon the same differential input signal. This new comparator design was incorporated into a complete four-bit delta-sigma modulator which was fabricated on a 0.6 /spl mu/m GaAs MESFET process.