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CMOS Image Sensor: Analog and Mixed-Signal Circuits
Abstract
In the image sensing optical receiver, such as CMOS Image Sensors (CIS), in general, comprise of photodiode and analog-mixed -signal circuits to amplify small photocurrent into digital signals. The CMOS image sensors are now the technology of choice for most imaging applications, such as digital video cameras, scanner and numerous other. Even though their sensitivity does not reach the one of the best actual CCD's (whose fill factor is about 100%), they are now commonly used because of their multiple functionalities and their easy fabrication. CMOS analog-mixed -signal circuits play a very important role for CMOS image sensors. This chapter will present the recent works on the CMOS analog-mixed -signal circuit for image sensing application, particularly for device related to machine vision application. A review of designing aspect of CIS are done. A proposed light integrating CIS was developed and measured.
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