NDLI: Response Properties of a Foveated Space-variant Cmos

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Response Properties of a Foveated Space-variant Cmos

Content Provider	Semantic Scholar
Author	Pardo, I. M. A. G. E. S. E. N. S. O. R. F. Boluda, Jose Antonio Felici, Santiago Dierickx, Bart Er, Díaz-Rubio
Copyright Year	1996
Abstract	RESPONSE PROPERTIES OF A FOVEATED SPACE-VARIANT CMOS IMAGE SENSOR F. Pardo1 J.A. Boluda1 J.J. P erez1 S. Felici1 B. Dierickx2 D. Sche er2 1Instituto de Robotica-Universidad de Valencia, C/ Hugo de Moncada 4-E, 46010 Valencia, SPAIN Fernando.Pardo@uv.es 2IMEC, Kapeldreef 75, 3001 Leuven, BELGIUM dierickx@imec.be ABSTRACT A new foveated CMOS image sensor has been designed and fabricated. The photocell elements transform the light into current, and then, in a continuous way, into voltage without charge integration. This kind of sensing cell has been already employed in image sensors for normal cameras, but never in foveated sensors. The presented sensor tries to emulate the human eye pixel resulting in a sensor with a space variant distribution of pixels. Consequences of this distribution are the di erent size of the sensing elements in the pixel matrix, the non orthogonal shapes of the different elements that integrate the pixel, and, as a result, the di erent response of every cell in the sensor. A scaling mechanism is needed due to the di erent pixel size from circumference to circumference. A mechanism for current scaling is presented. This mechanism has been studied along with other e ects, as the narrow channel e ect on submicron MOS transistors, and the in uence of the logarithmic response of these special kind of sensing cells. The chip has been fabricated using standard 0.7 m CMOS technology.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://tapec.uv.es/papers/iscas96.ps.gz
Language	English
Access Restriction	Open
Subject Keyword	Active pixel sensor CMOS Circumference Ectomesenchymal Chondromyxoid Tumor HGNC Image scaling Image sensor Photomultiplier Tube Device Component Pixel Size Test scaling Transistor sensor (device) voltage
Content Type	Text
Resource Type	Article

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