Offset noise cancellation in array image sensors

Details Offset noise cancellation in array image sensors Offset noise cancellation in array image sensors

1996-11-14

2000-05-23

Garber, Wendy

Television

Camera, system and detail

Combined image signal generator and general image signal...

348250, 348301, H04N 5217, H04N 964, H04N 314

Patent

active

060671130

ABSTRACT:
An integrated circuit active pixel image sensor comprises an array of active pixels having associated therewith one capacitor in each pixel column for storing a combined pixel output signal comprising an image signal and a fixed offset signal and another capacitor in each column for capturing another signal produced when the pixel is reset. The array may be read row-by-row. Each column includes a comparator and a data latch via which a digitized fixed offset corrected pixel output signal is obtained using a ramp voltage source and a digital count broadcaster provided in the sensor.

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Garverick et al., A 32-Channel Charge readout IC for Programmable, Nonlinear Quantization of Multichannel Detector Data, IEEE Journal of Solid-State circuits, vol. 30, No. 5, May 1995, pp. 533-541.

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