Patent ID: 7652699

Claim:
An image sensor comprising: a plurality of pixel circuits, one each for controlling one of a plurality of pixels, comprising: a first floating gate semiconductor device having a first floating gate, a first control gate, a first drain and a first source; a second floating gate semiconductor device having a second floating gate, a second control gate, a second drain and a second source; a third floating gate semiconductor device having a third floating gate, a third control gate, a third drain and a third source; a photosensitive semiconductor device positioned for exposure to electromagnetic radiation from an image; and a pixel control circuit connected to direct the first, second, and third floating gate semiconductor devices and the photosensitive semiconductor device to a plurality of controlled modes, the controlled modes including: an erase mode in which at least a portion of an electric charge is removed from the first, second, and third floating gates to place the first, second, and third floating gate semiconductor devices, respectively in an initialized state; and an exposure mode in which the first, second, and third floating gates are charged at least partially in response to a voltage at a terminal of the photosensitive semiconductor device while being sequentially selected as the color tunable filter allows all desired combinations of colors to pass, the voltage at the terminal corresponding to exposure of the photosensitive semiconductor device to the electromagnetic radiation from the image; and a color tunable filter positioned between the electromagnetic radiation and the photosensitive semiconductor device of each of the plurality of pixel circuits.