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This report describes behavioral simulation of delta-sigma analog to digital converters including the effects of device noise. Simulation of the feedback loop filters with SpectreRF provides the statistics of the device noise. A discrete time filter is used to generate noise with similar power spectral density (PSD) during the behavioral simulation. A second order converter is used to demonstrate the methodology and the simulation results are presented. Our approach does not make assumptions about the device and quantization noise adding linearly and takes into account their interaction. It is numerically efficient, as the behavioral simulation does not require significantly higher computational effort than in the case that device noise is not included. The same approach can be applied to continuous time converters.
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