Title :
LSB Dithering in MASH Delta–Sigma D/A Converters
Author :
Pamarti, Sudhakar ; Galton, Ian
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA
fDate :
4/1/2007 12:00:00 AM
Abstract :
Theoretical sufficient conditions are presented that ensure that the quantization noise from every constituent digital delta-sigma (DeltaSigma) modulator in a multistage digital DeltaSigma modulator is asymptotically white and uncorrelated with the input. The conditions also determine if spectral shape can be imparted to the dither´s contribution to the power spectral density of the multistage digital DeltaSigma modulator´s output. A large class of popular multistage digital DeltaSigma modulators that satisfy the conditions are identified and tabulated for easy reference
Keywords :
delta-sigma modulation; quantisation (signal); LSB dithering; MASH; delta-sigma D/A converters; dither techniques; multistage digital delta-sigma modulator; power spectral density; quantization noise; Art; Delta modulation; Digital modulation; Frequency; Multi-stage noise shaping; Noise cancellation; Noise shaping; Quantization; Random sequences; Sufficient conditions; Delta–sigma ($Delta Sigma$) modulation; MASH; dither techniques; quantization;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2006.888780
