Abstract:
Sigma-delta A/D converters constitute a popular method of A/D conversion since they can achieve higher resolution with simpler analog circuitry. Using feedback and feedforward paths, their performance can be increased even further. However there are quite numerous possible feedback and feedforward paths and it is an important concern to find the gain values of these paths. In this thesis, an automatic tool is presented to find the optimum Sigma-Delta A/D converter topologies for desired specifications. The tool is then used to find some desirable topologies for second order Sigma-Delta A/D converters. Some different approaches are needed in order to find solutions. Then the solution topologies are simulated and compared. The tool presented is quite versatile and may even be used for other kind of topologies in z-domain.
