Title :
A 0.88nW/pixel, 99.6 dB Linear-Dynamic-Range Fully-Digital Image Sensor Employing a Pixel-Level Sigma-Delta ADC
Author :
Ignjatovic, Zeljko ; Bocko, Mark F.
Author_Institution :
Rochester Univ., NY
Abstract :
We describe a CMOS image sensor employing pixel-level SigmaDelta analog to digital conversion. The design has high fill factor (31%), zero DC offset fixed pattern noise and reduced reset and transistor readout noise in comparison to other analog and digital imager readout techniques. The SigmaDelta pixel design also has low power consumption: 0.88 nW/pixel at 30 fps, high dynamic range of 16 bits, intrinsic linearity, and relative insensitivity to process variations
Keywords :
CMOS image sensors; sigma-delta modulation; CMOS image sensor; analog imager readout; digital imager readout; linear-dynamic-range; sigma-delta ADC; Analog-digital conversion; CMOS image sensors; Delta-sigma modulation; Digital images; Dynamic range; Energy consumption; Image sensors; Linearity; Noise reduction; Pixel;
Conference_Titel :
VLSI Circuits, 2006. Digest of Technical Papers. 2006 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0006-6
DOI :
10.1109/VLSIC.2006.1705293
