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DESIGN PROCEDURES FOR SIGMA DELTA MODULATORS

by JAIN, MOHIT

Abstract (Summary)
With the emergence of complex, non-linear mixed signal systems it becomes important to devise strategies to model them accurately at the system level. Though advanced CAD tools are available for digital design, analog design is still a kind of “empirical art” which mainly involves selection of architecture, determining specifications for individual analog blocks and implementation of the system with minimization of non-idealities. For a long time, most of the building block specifications and non-idealities were explored at the transistor level which involved a lot of time for each run and multiple runs to achieve the required specifications. To explore a new method for modeling of a mixed signal circuit is the main point of investigation of this thesis. In order to explore the new method of modeling, a Sigma-Delta A/D converter is considered. These converters are gaining popularity as they are insensitive to circuit imperfections and component mismatch. Design of Switched-Capacitor (SC) Sigma-Delta modulators requiring optimization of a large set of parameters has been explored and a top-down method for design of such systems is presented. The research work deals in detail with the modeling of the converter, choosing the appropriate analog blocks at the transistor level and various trade offs in implementation of the same.
Bibliographical Information:

Advisor:

School:University of Cincinnati

School Location:USA - Ohio

Source Type:Master's Thesis

Keywords:sigma delta modulators simulink modeling

ISBN:

Date of Publication:01/01/2005

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