On the dynamic behavior of a novel digital-only sigma-delta A/D converter

Abstract

Conventional sigma-delta (/spl Sigma//spl Delta/) analog-to-digital (A/D) converters are based on an analog /spl Sigma//spl Delta/ modulator followed by a digital filter. In this paper we propose a new architecture of a first-order /spl Sigma//spl Delta/ modulator that needs no active analog components. We call this /spl Sigma//spl Delta/ modulator "digital-only," and implement with it A/D converters in FPGA's or directly in the software of microprocessors. We here discuss aspects of the dynamic behavior of the proposed structure.