Title :
Code noise in delta-sigma modulators
Author :
Lindquist, Claude S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Miami Univ., Coral Gables, FL, USA
Abstract :
A unique kind of noise appears in pulse density modulated (PDM) signals generated by 1-bit delta-sigma type A/D converters. We choose to call this "code noise." It is due to the limited number of codes used to characterize the input below 20% and above 80% of full-scale. The mathematical basis is derived and the resulting noise plotted for a variety of word lengths.
Keywords :
analogue-digital conversion; codes; delta-sigma modulation; noise; pulse modulation; 1-bit delta-sigma type A/D converters; PDM signals; code noise; delta-sigma modulators; pulse density modulated signals; word lengths; Character generation; Delta modulation; Feedback; Modulation coding; Noise generators; Noise level;
Conference_Titel :
Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5148-7
DOI :
10.1109/ACSSC.1998.751415
