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Delta Sigma converter spurious tone predictor

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Delta Sigma converter spurious tone predictor

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25 Nov 2010 (Updated )

A simple analytical model that predicts DSM spurious tones with arbitrary stimulus.

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File Information
Description

This file contains functions for:
- estimating the quantizer noise from DSM and
- estimating the mismatch noise from DWA-DAC.

Both (time-domain) models generate noise estimate for arbitrary input vector (dc, sinusoid, n-tone, sawtooth etc.).

Applicable to bandpass DSMs and bandpass DWA.

For simulation, DS toobox is recommended: File ID: #19

Simulink DSM/DWA model can be found in: File ID: #23079

For further information:

Neitola M & Rahkonen T (2010) A Generalized Data-Weighted Averaging Algorithm. IEEE Trans. Circuits and Systems II: Express Briefs 57(2): 115-119.

Neitola M & Rahkonen T (2010) A Qualification Approach to DAC Mismatch-Shaping Methods. IEEE Trans. Circuits and Systems II: Express Briefs 57(11): 858-862.

Neitola M & Rahkonen T (2011) Predicting and Avoiding Spurious Tones in a DWA Mismatch Shaping DAC. Accepted to IEEE Trans. Circuits and Systems II: Express Briefs.

Neitola M & Rahkonen T (2011) Compact Tone-Behavior Model for Delta-Sigma Modulator. Submitted to European conference on circuit theory and design 2011.

Acknowledgements

Delta Sigma Toolbox inspired this file.

MATLAB release MATLAB 7.10 (R2010a)
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Comments and Ratings (1)
05 Mar 2012 Marko Neitola

The time-domain models presented here was also discussed in my doctoral dissertation, see chapter 6 in:
http://herkules.oulu.fi/isbn9789514297496/isbn9789514297496.pdf

Updates
30 Nov 2010

Added a complementing model: a simulink model of a digital Delta-Sigma modulator. The quantizer for this model is "truncation": unsigned integer ouput.

21 Jun 2011

Model accuracy improved. Removed extra material.

21 Jun 2011

Added a model for multibit DSM's mismatch shaper.
Fixed a bug in the DSM noise model.

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