Title :
A linear-logarithmic CMOS pixel for high dynamic range behavior with fixed-pattern-noise correction and tunable responsivity
Author :
Vatteroni, Monica ; Covi, Daniele ; Sartori, Alvise
Author_Institution :
Neuricam s.p.A., Trento
Abstract :
A CMOS image sensor with programmable dynamic range linear-logarithmic response through tunable transition point and fixed pattern noise correction is presented. Each 9.4x9.4 mum2 pixel cell integrates a 5T active pixel structure with a hard reset and an active load for the high light logarithmic behavior. A chip with a 100x100 pixel array and 12-bit digital output has been fabricated in a 0.35um, 3.3V standard CMOS technology. The dynamic range of the sensor can be changed from 45 dB to over 120 dB with decreasing pixel resolution, the temporal noise is lower than 0.22% over the full range and the fixed patter of 0.83% (1.39%) in the linear (logarithmic) region.
Keywords :
CMOS image sensors; image denoising; image resolution; CMOS image sensor; fixed pattern noise correction; fixed-pattern-noise correction; high dynamic range behavior; linear-logarithmic CMOS pixel; pixel resolution; programmable dynamic range linear-logarithmic response; size 0.35 mum; tunable responsivity; tunable transition point; voltage 3.3 V; CMOS image sensors; CMOS technology; Dynamic range; Image coding; Image sensors; Internet; Pixel; Video recording; Voltage; Web sites; CMOS active pixel; digital camera; dynamic range; image sensor;
Conference_Titel :
Sensors, 2008 IEEE
Conference_Location :
Lecce
Print_ISBN :
978-1-4244-2580-8
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2008.4716593
