Spurious tones in digital delta sigma modulators with pseudorandom dither

Authors

Michael Peter Kennedy, University College CorkFollow
Brian Fitzgibbon, Susquehanna International Group, LLP
Kerry Dobmeier, University of Notre Dame

Abstract

Pseudorandom dither generators are widely used to break up periodic cycles in digital delta sigma modulators in order to minimize spurious tones produced by underlying periodic behavior. Unfortunately, pseudorandom dither signals are themselves periodic and therefore can have limited effectiveness. This paper identifies some limitations of using pseudorandom dither signals that are inherently periodic. © 2013 IEEE.

Publication Title

Proceedings - IEEE International Symposium on Circuits and Systems

Recommended Citation

Kennedy, M., Fitzgibbon, B., & Dobmeier, K. (2013). Spurious tones in digital delta sigma modulators with pseudorandom dither. Proceedings - IEEE International Symposium on Circuits and Systems, 2747-2750. https://doi.org/10.1109/ISCAS.2013.6572447