专利内容由知识产权出版社提供
专利名称：Methods of calibrating linear-logarithmic
image sensors
发明人：Yoel Yaffe,Claudio G. Jakobson,Shemi
Prazot,Uzi Hizi
申请号：US14224198申请日：20140325公开号：US09843750B2公开日：20171212
专利附图：
摘要：Methods of calibrating a linear-logarithmic image sensor pixel includeperforming a reset of the pixel in advance of establishing a leakage current between a
photodiode and a floating diffusion region of the pixel. A first voltage of the floatingdiffusion region is then read through a source follower and selection transistor, after theleakage is terminated. A step is then performed to transfer charge between thephotodiode and the floating diffusion region of the pixel so that a voltage of a cathodeof the photodiode is increased. Thereafter, a second voltage of the floating diffusionregion is read. The first and second read voltages are then used to perform a calibrationoperation. These steps may be repeated to establish another leakage current ofdifferent duration/magnitude and yield third and fourth read voltages, which supportfurther calibration.
申请人：Samsung Electronics Co., Ltd.
地址：Suwon-si KR
国籍：KR
代理机构：Myers Bigel, P.A.
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