Delta Sigma converter spurious tone predictor

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

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.