IMAGE SENSING DEVICE, PROCESS FOR DRIVING SUCH A DEVICE AND ELECTRICAL SIGNAL GENERATED IN SUCH A DEVICE

摘要

An image sensing device has an image cell (ICn) with a photo-sensitive element (FD), a detection node (C) and an output pin. Charges accumulated during a first period of time are transferred from the photo-sensitive element (FD) to the detection node (C), thereby obtaining a first voltage, and kept on the detection node (C) which is thus used as a memory. Some moments later, a first value corresponding to the first voltage is generated on the output pin, charges accumulated during a second period of time are transferred from the photo-sensitive element (FD) to the detection node (C), thereby obtaining a second voltage, and a second value is generated on the output pin corresponding to the second voltage. The signal thus generated is also proposed.