High dynamic range charge readout system

Details High dynamic range charge readout system High dynamic range charge readout system

2006-11-21

2006-11-21

Ho, Tuan (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S311000, C348S313000, C257S223000, C257S230000

Reexamination Certificate

active

07139023

ABSTRACT:
A solid-state image sensor has a readout architecture that incorporates charge multiplier cells into a horizontal register of a CCD image sensor, and includes a first CCD register adjacent to at least a second CCD register and coupled to the said first register through a charge overflow barrier. A high Dynamic Range readout system results in which the DR is not restricted by the voltage swing limitations on the charge detection node. As the charge is multiplied, the horizontal register structure increases in width and more charge multiplication gates are added per stage. A charge overflow region follows the charge multiplier. In this region the amount of charge that exceeds a certain predetermined threshold is split off into another register. A detection node that has different conversion sensitivity may terminate this register. The process of charge overflow and splitting off may continue for more than two steps.

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patent: 6392260 (2002-05-01), Farrier et al.
patent: 6444968 (2002-09-01), Burt et al.

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