Table-based modeling of delta-sigma modulators using ZSIM

Authors:
G. T. Brauns;R. J. Bishop;M. B. Steer;J. J. Paulos;S. H. Ardalan
Affiliations:
North Carolina State Univ., Raleigh, NC;-;-;-;-
Venue:
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Year:
2006

Citing 0
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Automated synthesis of discrete-time sigma-delta modulators from system architecture to circuit netlist

Microelectronics Journal

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Abstract

ZSIM, a nonlinear Z-domain simulator for sampled-data systems, is presented and verified. ZSIM integrates analytic tools, a difference equation simulator, a table-based nonlinear Z-domain simulator, and digital signal processing into a workstation environment to provide fast and accurate simulation of delta-sigma modulators. The use of table-based simulation allows simulation of circuit nonidealities including clock feedthrough and saturation. Benchmark comparisons of difference equation simulations and table-based simulations are presented for delta-sigma modulators suitable for use in voice-band coders