Title :
Integration time optimization for integrating photosensors
Author :
Sander, David ; Nelson, Nicole ; Abshire, Pamela
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD
Abstract :
We maximized the information transmission for an integrating photosensor by optimizing the integration time. As a case study, experimentally determined reset, readout and photocurrent shot noise was used to determine the capacity of a differential active pixel sensor as a function of illumination level and integration time. Experimentally derived data show that the information rate is poor at both small and large integration times, with a maximum information rate occurring between these extremes. This maximum occurs at different integration times for different illumination levels and is used to determine the optimal integration time for the sensor.
Keywords :
optimisation; photodetectors; differential active pixel sensor; information transmission; integration time optimization; photosensors; Active noise reduction; Bandwidth; Capacitive sensors; Communication channels; Gaussian noise; Information rates; Layout; Lighting; Sensor arrays; Signal to noise ratio;
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
DOI :
10.1109/ISCAS.2008.4541927
