基于大动态范围CMOS图像传感器对数有源像素一种新的FPN抑制技术(英文)  

A Novel FPN Reduction Technology of Logarithmic APS Based on Wide Dynamic Range CMOS Image Sensor

作　　者：刘激扬[1] 姚素英[1] 赵毅强[1] 张为[1] 张生才[1] 李树荣[1] 徐江涛[1] 

机构地区：[1]天津大学电子信息工程学院ASIC设计中心,天津300072

出　　处：《传感技术学报》2005年第4期790-793,共4页Chinese Journal of Sensors and Actuators

摘　　要：对数模式的CMOS图像传感器提供了大动态范围(大约120dB)。在对数图像传感器设计中缺少简单的消除FPN的方法。采用对数模式的CMOS图像传感器获得了比线性APS大的动态范围。在对数模式传感器中采用了一种新的FPN抑制技术。即在对数像素中增加一个开关晶体管并结合双采样电路,该技术的实施使得对数像素的读出显著的降低了FPN水平。The logarithmic response CMOS image sensor provides a wide dynamic range （around 120dB）, but its drawback in logarithmic image sensor design is the lack of simple fixed pattern noise （FPN） cancellation scheme. A Log-APS is employed for CMOS image sensor to achieve wider dynamic range than linear APS. A novel FPN reduction technology is introduced to enable pixel FPN reduction in a logarithmic mode image sensor by additional transistor with double sampling circuit. This is a significantly high reduction in the FPN levels and it suggests that the double sampling technique with additional switch transistor is an efficient method for FPN reduction in the logarithmic mode of pixel output.

关 键 词：对数有源像素 像素内FPN抑制 双采样 CMOS图像传感器 

分 类 号：TN4[电子电信—微电子学与固体电子学] TN911