Title :
Adaptive compensation of analog circuit imperfections for cascaded delta-sigma ADCs
Author :
Sun, Tao ; Wiesbauer, Andreas ; Temes, Gabor C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA
Abstract :
Cascaded delta-sigma modulators are known to suffer from analog circuit imperfections. The adaptive algorithm and structure proposed in this paper can digitally compensate the effects of these imperfections using digital filtering. Experimental results show that after compensation a performance improvement of more than 25 dB in signal-to-noise-and-distortion ratio can be achieved
Keywords :
CMOS integrated circuits; adaptive filters; cascade networks; compensation; digital filters; sigma-delta modulation; CMOS IC; MASH structure; adaptive algorithm; adaptive compensation; analog circuit imperfections; cascaded delta-sigma ADCs; delta-sigma modulators; digital filtering; Adaptive algorithm; Analog circuits; Buildings; Capacitors; Delta modulation; Digital filters; Multi-stage noise shaping; Signal to noise ratio; Sun; Transfer functions;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704459
