Work

Quantization Noise Cancellation Through Modelling of Non-Linearities in Sigma Delta Modulators

Year: 2025

Type: conference-paper

Abstract: The linearity of Sigma Delta Modulators (SDMs) is evaluated performing a Fourier Transform of the output bitstream. The presence of quantization noise complicates this task: many samples and lengthy simulations are needed to lower this noise floor and evaluate the signal harmonics. We present here a method to estimate the quantization noise, remove it from the SDM bitstream, and enable the reduction of the samples needed to evaluate the SDM linearity. By applying the proposed technique to a Simulink®model of a 4th-order SDM, the accuracy of the linearity estimation is kept unchanged using 5000x less bitstream samples. This method enables a significant reduction of SDM verification time that in turn can be used to improve the statistical coverage of design over parameter variability.

Source: IEEE International Symposium on Circuits and Systems proceedings

DOI: 10.1109/iscas56072.2025.11044157

Authors: Stijn Ringeling, Marco Fattori, Shagun Bajoria, Robert Rutten, Lucien Breems, Eugenio Cantatore

Institutions: Eindhoven University of Technology, NXP (Netherlands)

Language: English

Topic: Analog and Mixed-Signal Circuit Design

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: NXP Semiconductors, Ministry of Economic Affairs, Ministerie van Economische Zaken en Klimaat

OpenAlex ID: W4411725763