Charge-coupled device, image sensor arrangement and camera provi

Details Charge-coupled device, image sensor arrangement and camera provi Charge-coupled device, image sensor arrangement and camera provi

1993-02-17

1994-06-28

Sikes, William L.

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

Charge transfer device

Compensating for or preventing signal charge deterioration

377 62, 257223, 257230, 348243, 348314, H04N 5217, G11C 2704, G11C 1928, H01L 2714

Patent

active

053254120

ABSTRACT:
In CCD's, the major part of the dark current is caused by surface states. This dark current is disturbing, especially in image sensors, because the sensitivity of the camera is limited thereby. When according to the invention the integrating gates are varied periodically, the subjacent surface parts of the - buried - channel being brought periodically into inversion and into depletion, while maintaining the charge-containing capacity, a considerable reduction of the dark current can be obtained. In image sensors, voltage variation preferably occurs during the fly-back time.

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patent: 4679212 (1987-07-01), Hynecek
patent: 4779124 (1988-10-01), Hynecek
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patent: 4963952 (1990-10-01), Janesick
patent: 5008758 (1991-04-01), Burke
patent: 5115458 (1992-05-01), Burkey et al.

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