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Data Weighted Averaging for Simulink

version (200 KB) by Marko Neitola
A group of Delta-Sigma SIMULINK- models with DWA mismatch shaping.


Updated 15 Oct 2010

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The SIMULINK- models of multibit Delta-Sigma ADC and Delta-Sigma DAC all have a non-ideal D/A-converter.

The DAC mismatch noise will be shaped according to a general Data Weighted Averaging (DWA) transfer function 1±z^(-D), where D is a positive integer.

The DWA element selection logic calculates a selection vector. The selection vector chooses, which of the unit DACs will be used according to DAC input.

The DWA block is constructed using mainly fixed-point blocks.
Models for Incremental DWA (IDWA) were also added.

This package also includes a spurious tone estimator: the spurs can be estimated using the DS input signal and the DNL error shape.

Cite As

Marko Neitola (2021). Data Weighted Averaging for Simulink (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (5)

Tsanming XIA

Thank you so much for sharing the valuable material

Neo Ding

Marko Neitola

This model and the related paper (mentioned previously) were also a part of my Ph.D. thesis:

Marko Neitola

The mismatch noise estimator was improved ad added to submission #29522: "Delta Sigma converter spurious tone predictor".

Both DWA mismatch noise model and DSM quantization noise models can be found in #29522.

Marko Neitola

More information about this model:

Neitola, M., Rahkonen, T.: A Generalized Data-Weighted Averaging Algorithm. Circuits and Systems II: Express Briefs, IEEE Transactions on, Volume: 57 , Issue: 2, Publication Year: 2010 , Page(s): 115 - 119

Available on IEEE Xplore

MATLAB Release Compatibility
Created with R2010a
Compatible with any release
Platform Compatibility
Windows macOS Linux

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