Title :
A 120-dB Dynamic Range CMOS Image Sensor with Programmable Power Responsivity
Author :
Stoppa, David ; Simoni, Alexandra ; Baschirotto, A.
Author_Institution :
Centro per la Ricerca Scientifica e Tecnologica, Trento
Abstract :
A high dynamic range CMOS image sensor providing a user-programmable power responsivity curve is presented. Each 15 times 15mum2-pixel cell integrates, besides a 4T active pixel structure, a voltage comparator and an analog memory to implement a time-to-saturation scheme while also providing the standard integrated photo-current signal. A 140 times l40-pixel array has been fabricated in a 0.35-mum, 3.3-V standard CMOS technology. The sensor features a typical dynamic range of 120 dB with a temporal noise lower than 0.13% and a fixed pattern noise of 0.4% (1.7%) at low (high) irradiance
Keywords :
CMOS image sensors; comparators (circuits); 0.35 micron; 3.3 V; CMOS active pixel; CMOS image sensor; analog memory; digital cameras; fixed pattern noise; programmable power responsivity; standard integrated photo-current signal; temporal noise; time-to-saturation scheme; video camera; voltage comparator; CMOS image sensors; CMOS technology; Dynamic range; Image coding; Image sensors; Lighting; Photoconductivity; Pixel; Switches; Voltage; CMOS active pixel; digital cameras; image sensor; video camera; wide dynamic range;
Conference_Titel :
Solid-State Circuits Conference, 2006. ESSCIRC 2006. Proceedings of the 32nd European
Conference_Location :
Montreux
Print_ISBN :
1-4244-0303-0
DOI :
10.1109/ESSCIR.2006.307470
