Presentation
Quantization Noise Cancellation Through Modelling of Non-Linearities in Sigma Delta Modulators
DescriptionThe linearity of Sigma Delta Modulators (SDMs) is evaluated performing a Fourier Transform of its output bitstream. The presence of quantization noise complicates this task: many samples and long simulations are needed to lower this noise floor and evaluate the signal harmonics. A method is presented here to estimate the quantization noise, remove it from the SDM bitstream, and reduce the samples needed to evaluate SDM linearity. Applying the proposed technique to a Simulink model of a fourth-order SDM, the linearity estimation accuracy is kept unchanged using 5000x less bitstream samples, thus enabling a strong reduction of the SDM verification time or an improved statistical coverage of PVT variability.
Event Type
Work-in-Progress Poster
TimeTuesday, June 256:00pm - 7:00pm PDT
LocationLevel 2 Lobby
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