Title :
A high-speed image centroid computation sensor
Author :
Furth, Paul M. ; Kothapalli, Karthik R. ; Surkanti, Punith R.
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, Mexico
Abstract :
We present a fully-integrated analog CMOS image centroid computation sensor. A 40×40 pixel array is designed and fabricated in a 0.5-μm CMOS process. The proposed centroid computation circuit achieves 7 times improvement in bandwidth compared to similar circuits in the literature. Moreover, the incorporation of a linearized transconductor improves precision in the computed centroid. The sensor is designed to operate over a wide range of photocurrents from 10 pA to 1 μA. Test results of the proposed architecture verify its superior performance.
Keywords :
CMOS analogue integrated circuits; CMOS image sensors; high-speed integrated circuits; integrated circuit design; linearisation techniques; photoconductivity; bandwidth improvement; centroid computation circuit; current 10 pA to 1 muA; fully-integrated analog CMOS image centroid computation sensor; high-speed image centroid computation sensor; linearized transconductor; performance verification; photocurrents; pixel array design; size 0.5 mum; Bandwidth; Capacitance; Computer architecture; Current measurement; Mirrors; Photoconductivity; Transistors;
Conference_Titel :
Circuits and Systems (MWSCAS), 2012 IEEE 55th International Midwest Symposium on
Conference_Location :
Boise, ID
Print_ISBN :
978-1-4673-2526-4
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2012.6292027
