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专利名称：Differential column readout scheme for
CMOS APS pixels
发明人：Sandor L. Barna,Alex Krymski申请号：US11167076申请日：20050627公开号：US07154078B2公开日：20061226
专利附图：
摘要：The present invention provides an improved column readout circuitry andmethod of operation which minimizes substrate and other common mode noise during aread out operation. The circuit improves the consistency of the pixel to pixel output of
the pixel array and increases the dynamic range of the pixel output. This is accomplishedby obtaining a differential readout of the reset signal and integrated charge signal from adesired pixel along with the reset signal and charge signal from a reference circuit. In thismanner common mode noise can be minimized by a combination of signals from thedesired and reference pixels in the sample and hold aspect of the column circuitry. In oneexemplary embodiment of the invention, a 3T pixel arrangement is used. In anotherexemplary embodiment, a 4T arrangement is used. Additional exemplary embodimentsprovide differential column readout circuitry that can be used with any two signalsources.
申请人：Sandor L. Barna,Alex Krymski
地址：Pasadena CA US,La Crescenta CA US
国籍：US,US
代理机构：Dickstein Shapiro LLP
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