Title :
ALOHA CMOS imager
Author :
Culurciello, Eugenio ; Andree, A.G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
Abstract :
We report on a A 32×32 pixel CMOS imager with a digital pixel output fabricated in a 0.6 μm CMOS process. The imager incorporates an embedded ALOHA MAC interface for unfettered self-timed pixel read-out in energy aware sensor network applications. Collision on the output is monitored using an analog contention detector. The imager has an unprecedented dynamic range of 240 dB for an individual pixel with an array dynamic range of 180 dB. The power consumption is 795 μW for typical outdoor illumination conditions with a typical pixel mean event rate of 10 K samples/s with frame rate updates of 4.88 K frames/s.
Keywords :
CMOS image sensors; access protocols; power consumption; smart pixels; 0.6 micron; 795 muW; ALOHA CMOS imager; ALOHA MAC interface; CMOS process; analog contention detector; digital pixel output; energy aware sensor network application; outdoor illumination; output collision monitoring; power consumption; unfettered self-timed pixel read-out; CMOS image sensors; CMOS process; Detectors; Dynamic range; Energy consumption; Image sensors; Pixel; Power engineering and energy; Sensor arrays; Wireless sensor networks;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329164
