Low power global shutter CMOS active pixel image sensor with ultra-high dynamic range

Abstract

A novel low power global shutter CMOS active pixel sensor (APS) with ultra-high dynamic range is presented. Incorporating a sample-and-hold element in each pixel, the sensor enables imaging of fast moving objects in the field of view. An adaptive exposure time is automatically applied to each pixel, according to the local illumination intensity level, significantly increasing the dynamic range of the sensor. Driven by low-power dissipation requirements, the proposed pixel is operated by low voltage supply (1.8V). System architecture and operation are discussed and simulation results in a standard 0.35 /spl mu/m CMOS technology are presented.