Title :
A single-chip 306/spl times/244-pixel CMOS NTSC video camera
Author :
Smith, S. ; Hurwitz, J. ; Torrie, M. ; Baxter, D. ; Holmes, A. ; Panaghiston, M. ; Henderson, R. ; Murray, A. ; Anderson, S. ; Denyer, P.
Author_Institution :
VLSI Vision Ltd., Edinburgh, UK
Abstract :
Recently, a technological alternative to CCD in the form of cameras using sensors built from standard CMOS processes has appeared, and we report here a further milestone. A single-chip NTSC video camera can be partitioned into analog (custom) and digital (cell-based) sections. The sensing heart of the device is an array of 306/spl times/244 photosensitive elements, each comprising a three-transistor active pixel based on a standard CMOS n +/p-well photodiode. Photocharge integrated in the pixel during exposure is read row-sequentially into a column structure that removes the systematic offset of each pixel by a read sequence with correlated double sampling.
Keywords :
video cameras; 244 pixel; 306 pixel; 74664 pixel; CMOS n +/p-well photodiode; NTSC video camera; cell-based sections; column structure; correlated double sampling; image sensors; photosensitive elements; read sequence; row-sequential reading; standard CMOS processes; systematic offset; three-transistor active pixel; Analog computers; CMOS image sensors; Cameras; Charge coupled devices; Diodes; Registers; Solid state circuits; Timing; Videoconference; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 1998. Digest of Technical Papers. 1998 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-4344-1
DOI :
10.1109/ISSCC.1998.672420
