A high-level simulation and synthesis environment for ΔΣ modulators

Authors:
K. Francken;G. G.E. Gielen
Affiliations:
Dept. of Electr. Eng., Katholieke Universiteit Leuven, Leuven-Heverlee, Belgium;-
Venue:
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Year:
2006

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Abstract

An approach is presented for the high-level simulation and synthesis of discrete-time ΔΣ modulators based on a simulation-based optimization strategy. The high-level synthesis approach determines both the optimum modulator topology and the required building block specifications, such that the system specifications-mainly accuracy (dynamic range) and signal bandwidth-are satisfied at the lowest possible power consumption. A genetic-based differential evolution algorithm is used in combination with a fast dedicated behavioral simulator to realistically analyze and optimize the modulator performance. The approach has been implemented in a tool called Daisy (Delta-Sigma Analysis and Synthesis). Experimental results are shown for both the analysis and synthesis capabilities, illustrating the effectiveness of the approach. The selected range of optimized ΔΣ modulator topologies as a function of the modulator specifications for a wide range of values indicate the capabilities of and the performance range covered by the tool.