Embodiments of the invention provide pixel cells that allow both automatic light control and correlated double sampling operations. The pixel cell includes first and second photo-conversion devices that can be separately read out. For example, the second photo-conversion device can be the pixel cells'...http://www.google.fr/patents/US7312431?utm_source=gb-gplus-shareBrevet US7312431 - CMOS imaging for ALC and CDS
