In this paper, a general set of non-linear equations (Nus) that can be used to evaluate the perfonnance of higher order sigma delta modulator schemes is proposed. The validity of these NUS have been verijied using extensive simulations. For given input conditions, the set of NLEs enables the designer to develop stable higher order sigma delta modulators with improved SNR performances. Since a general thresholder is used in the analysis, it is also possible to use the NLEs to determine the effect of multi-level thresholding. The derivation of the set of NLEs followed by the verification technique via simulations and the subsequent use of NLEs to evaluate the higher order sigma delta modulator circuit stability can be considered as the novel contributions reported in this work.
['Saman S. Abeysekera']
Stability Analysis of Sigma - Delta Modulators Using a Non-Linear Technique