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

fYear

2012

fDate

5-8 Aug. 2012

Firstpage

342

Lastpage

345

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2012 IEEE 55th International Midwest Symposium on

Conference_Location

Boise, ID

ISSN

1548-3746

Print_ISBN

978-1-4673-2526-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2012.6292027

Filename

6292027