高光谱成像用高速CMOS图像传感器设计  

Design of High-speed CMOS Image Sensor for Hyperspectral Imaging

作　　者：冯国旭[1] 刘昌举[2,3] 刘戈扬 李明[2] 徐江涛[3] FENG Guoxu;LIU Changju;LIU Geyang;LI Ming;XU Jiangtao(The 11th Research Institute of China Electronics Technology Group Corporation,Beijing 100016,CHN;Chongqing Optoelectronics Research Institute,Chongqing 400060,CHN;School of Microelectonics,Tianjin University,Tianjin 300072,CHN)

机构地区：[1]中国电子科技集团公司第十一研究所,北京100016 [2]重庆光电技术研究所,重庆400060 [3]天津大学微电子学院,天津300072

出　　处：《半导体光电》2020年第4期489-493,共5页Semiconductor Optoelectronics

基　　金：国家重点研发计划项目(2017YFF0104700)。

摘　　要：针对高帧频、全局曝光、通道数可选等成像应用需求,提出了一种高光谱成像用CMOS图像传感器,重点分析了8T像素结构和读出电路的设计方案与电路原理,完成了芯片的整体仿真和流片验证。结果表明:设计符合预期,成像效果良好,像素具备较高的满阱和全局快门功能,读出电路实现了输出通道数可选功能,同时保证了模拟信号在大面阵、低输出通道数条件下的高速、低噪声输出,最终实现的像素阵列为2 048×256,像素尺寸为24μm×24μm,单通道最大输出频率为40×10^6 pixel/s,最高帧频为4 000f/s,可满足高光谱成像系统对图像传感器的需求。For the imaging requirements such as high frame rate,global shutter and adjustable output channel amount,a kind of CMOS image sensor for hyperspectral imaging is proposed.The schematic plan and working principles of 8 Tpixel structure and readout circuit are introduced in detail.Post-simulation and tapeout of this sensor were completed,and the experimental results show the design meets the expectation by achieving targeting features and realizing high-speed and low-noise analog signal output under the condition of large layout area and small amount of output channels.The pixel array size of 2 048×256 and the pixel pitch of24μm×24μm are achieved,the maximum signal output frequency for a single channel is 40×10^6 pixel/s and the frame rate can reach up to 4 000 f/s,being able to meet the general requirement of a hyperspectral imaging system.

关 键 词：CMOS图像传感器 高光谱成像 全局快门 高帧频 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]