Title :
Models for Pixels With Wide-Dynamic-Range Combined Linear and Logarithmic Response
Author :
Choubey, Bhaskar ; Collins, Steve
Author_Institution :
Univ. of Oxford, Oxford
fDate :
7/1/2007 12:00:00 AM
Abstract :
Previously, pixels have been proposed that combine the low-light sensitivity of linear pixels with the high dynamic range of pixels that have a logarithmic response. In this paper, a model for this type of pixel is presented that represents the response of the pixel over a wide range of photocurrents. Simulation and measurement results are presented to validate the model and to show that there is a simple procedure for determining the parameters of the model.
Keywords :
CCD image sensors; CMOS image sensors; CMOS image sensor; charge-coupled device; charge-coupled device sensors; linear active pixel sensors; linear pixels; logarithmic response; photocurrents; CMOS technology; Dynamic range; Layout; Parameter extraction; Photoconductivity; Photodiodes; Pixel; Prototypes; Semiconductor device modeling; Voltage; CMOS pixels; fixed-pattern noise; logarithmic pixels; mismatch; parameter extraction; wide-dynamic-range;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2007.895959
