DocumentCode
627097
Title
Spurious tones in digital delta sigma modulators with pseudorandom dither
Author
Kennedy, Michael Peter ; Fitzgibbon, Brian ; Dobmeier, Kerry
Author_Institution
Dept. Electr. & Electron. Eng., Univ. Coll. Cork, Cork, Ireland
fYear
2013
fDate
19-23 May 2013
Firstpage
2747
Lastpage
2750
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.
Keywords
delta-sigma modulation; random number generation; digital delta sigma modulators; periodic cycles; pseudorandom dither generators; spurious tones; Additives; Delta-sigma modulation; Generators; Modulation; Multi-stage noise shaping; Noise; Quantization (signal);
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location
Beijing
ISSN
0271-4302
Print_ISBN
978-1-4673-5760-9
Type
conf
DOI
10.1109/ISCAS.2013.6572447
Filename
6572447
Link To Document