OPTIMAL PARAMETERS FOR DELTA-SIGMA MODULATOR TOPOLOGIES

A systematic study of single-loop, cascaded, and multibit Delta Sigma modulators of second to fourth order is presented, based on a combinat ion of behavioral simulations and linear modeling. Constraints for opt imal performance and precise guidelines for the choice of parameters a re derived. Moreover, the optimal parameters and the corresponding per formance are found and given in tables. A graph showing the maximal ac hievable performance of each topology as a function of the oversamplin g ratio is presented, offering a valuable help for the design of analo g-to-digital converters.