High level modeling of sigma-delta analog to digital converters

Abstract

This thesis discuss high-level modeling of Sigma-Delta ADC’s, development of a design automation tool which operates at system level, and other related software which are required for accurate operation of this tool. There are some models available in the literature which are suitable for a design automation system. These models are taken as a starting point in the modeling effort in this thesis. Also, a Sigma-Delta ADC design automation tool was developed which involves novelties such as performance estimator and architecture selection. With the contribution of the performance estimator module, the tool provides an extensive design environment to the users for the design of Sigma- Delta analog-to-digital converters. The developed models and their effects are clearly presented with examples. Design examples for 0.5μm and 0.35μm AMS technologies are provided for proving the accuracy and flexibility of the design automation tool. In addition, a Sigma-Delta ADC IC was designed and fabricated.