A photosensor assembly has at least one line array of photosensors with a first
sensor size, and at least one line array of photosensors with a second sensor size,
with the two sizes being different. In an example embodiment, for every band of
wavelengths being sensed, there are two line arrays of sensors, with one line array
having relatively small sensor areas and the other line array having relatively
large sensor areas. The line arrays with relatively small sensor areas are used
for high native input sampling rates, and the line arrays with relatively large
sensor areas are used for high color accuracy and speed. To minimize cost and circuit
area, each line array of sensors having large sensor areas shares a charge shift
register with a line array of sensors having small sensor areas. If overflow drains
are present, some pairs of sensor line arrays may also share overflow drains.
