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dc.contributor.advisorKarsilayan, Aydin Ilker
dc.creatorHong, Augustin Jinwoo
dc.date.accessioned2005-08-29T14:38:52Z
dc.date.available2005-08-29T14:38:52Z
dc.date.created2003-05
dc.date.issued2005-08-29
dc.identifier.urihttp://hdl.handle.net/1969.1/2328
dc.description.abstractCMOS active pixel sensors (APS) have shown competitive performance with charge-coupled device (CCD) and offer many advantages in cost, system power reduction and on-chip integration of VLSI electronics. Among CMOS image sensors, sensors with logarithmic pixels are particularly applicable for outdoor environment where the light intensity varies over a wide range. They are also randomly accessible in both time and space. A major drawback comes from process variations during fabrication. This gives rise to a considerable fixed pattern noise (FPN) which deteriorates the image quality. In this thesis, a technique that greatly reduces FPN using on-chip calibration is introduced. An image sensor that consists of 64x64 active pixels has been designed, fabricated and tested. Pixel pitch is 18um x 19.2um? and is fabricated in a 0.5-um? CMOS process. The proposed pixel circuit considerably reduces the FPN as predicted in theoretical analysis. The measured FPN value is 2.29% of output voltage swing and column-wise FPN is 1.49% of mean output voltage over each column.en
dc.format.extent2509345 bytesen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherTexas A&M University
dc.subjectlogarithmic pixelen
dc.subjectself-calibrationen
dc.titleSelf-calibrating random access logarithmic pixel for on chip cameraen
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentElectrical Engineeringen
thesis.degree.disciplineVocational Educationen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelMastersen
dc.contributor.committeeMemberParlos, Alexander
dc.contributor.committeeMemberSilva-Martinez, Jose
dc.contributor.committeeMemberWright, Steve
dc.type.genreElectronic Thesisen
dc.type.materialtexten
dc.format.digitalOriginborn digitalen


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