Active-pixel image sensors

Details Active-pixel image sensors Active-pixel image sensors

2007-08-07

2007-08-07

Ometz, David (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S302000, C348S308000, C250S208100

Reexamination Certificate

active

10407871

ABSTRACT:
An image sensor has an array of pixels read by column circuits to provide reset and read samples on a pair of sample capacitors. To alleviate the effects of parasitic capacitance in the region of the sample capacitors, a modified timing arrangement is used. Both sample switches are operated simultaneously to pre-charge both sample capacitors with a pixel signal value. One sample switch is operated after reset to apply a reset value to one of the pre-charged sample capacitors.

REFERENCES:
patent: 5841126 (1998-11-01), Fossum et al.
patent: 6115066 (2000-09-01), Gowda et al.
patent: 2795586 (2000-12-01), None
Mendis et al., CMOS Active Pixel Image Sensors for Highly Integrated Imaging Systems. IEEE Journal of Solid-State Circuits, vol. 32, Feb. 1997, pp. 187-197.

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