Image sensor with readout circuit

Details Image sensor with readout circuit Image sensor with readout circuit

2011-03-22

2011-03-22

Giles, Nicholas G (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S302000

Reexamination Certificate

active

07911512

ABSTRACT:
An image sensor has an array of pixels. Each column has a first and a second column line connected to a read-reset amplifier/comparator which acts in a first mode as a unity gain buffer amplifier to reset the pixels via the first lines, and in a second mode acts as a comparator and AD converter to produce digitized reset and signal values. The reset and signal values are read out a line at a time in interleaved fashion. Reset values are stored in a memory and subsequently subtracted from the corresponding signal values. The arrangement reduces both fixed pattern and kT/C noise.

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patent: 6809766 (2004-10-01), Krymski et al.
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patent: 0 617 552 (1994-09-01), None
patent: 99/44359 (1999-09-01), None

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