Charge skimming solid-state image array circuit and method inclu

Details Charge skimming solid-state image array circuit and method inclu Charge skimming solid-state image array circuit and method inclu

1989-11-21

1991-03-26

Munson, Gene M.

Electrical pulse counters, pulse dividers, or shift registers: c

Charge transfer device

Particular input or output means

357 24, 357 30, 307311, G11C 1928, H01L 2978, H01L 2714, H03K 342

Patent

active

050035657

ABSTRACT:
A solid state imaging array for generating a plurality of electrical imaging signals includes photodiodes for producing electrical charges in response to incident light, a signal processing circuit including a charge skimming electrode associated with each sensor for receiving and storing electrical charges from the associated sensor and for transferring a skimmed portion of the stored electrical charge to a respective charge coupled device. The skimmed portion of the electrical charge is determined by the magnitude of a skimming voltage applied to the respective skimming electrode. The array includes a second charge coupled device for applying different magnitude skimming voltages to each of the skimming electrodes in order to compensate for variations in the sensitivities of the photodiodes. The individual compensation is achieved for all of the photodiodes through only two external terminals.

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Kimata et al., "High Density . . . Image Sensor", SPIE, vol. 930, 1988, pp. 11-25.
Tanikawa et al., "A HgCdTe . . . Thermal Band", Transducers, 1987, pp. 496-499.
"Hybrid Infrared Focal-Plane Arrays", Chow et al., IEEE Transactions on Electron Devices, vol. ED-29, No. 1, Jan. 1982.

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