Complimentary metal oxide semiconductor imaging device

Details Complimentary metal oxide semiconductor imaging device Complimentary metal oxide semiconductor imaging device

1998-03-16

2000-07-04

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214A, 257292, 348304, H01J 4014

Patent

active

060842296

ABSTRACT:
A CMOS imager includes a photosensitive device such as a photosensitive device such as a photodiode or photogate having a sense node coupled to an FET located adjacent to the photosensitive region. Another FET, forming a differential input pair of an operational amplifier is located outside of the array of pixels. The operational amplifier is configured for unity gain and a row or column of input FETs is connected in parallel. A correlated double sampler is connected to the output of the operational amplifier for providing a fixed pattern noise free signal.

REFERENCES:
patent: 5296696 (1994-03-01), Uno
patent: 5471515 (1995-11-01), Fossum et al.
patent: 5493423 (1996-02-01), Hosier
patent: 5528643 (1996-06-01), Hynecek
patent: 5665959 (1997-09-01), Fossum et al.

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