传感技术学报2023，Vol.36Issue(3)：337-347,11.DOI:10.3969/j.issn.1004-1699.2023.03.001
一种具有失调抑制技术的全局快门帧差型传感器
A Global Shutter Frame Difference Sensor with Offset Suppression Technique
摘要
Abstract
A low fixed pattern noise(FPN)circuit implementation method for a global shutter frame difference sensor(FDS)is presented. The FDS encodes the corresponding event information according to the light intensity changes of two consecutive frames and outputs only 2-bit data for each pixel. The global shutter scheme is achieved by alternating two capacitors inside the pixel. The offset suppression tech-nique combines the differential delta sampling scheme for differentiator with the offset suppression scheme based on capacitor storage for comparators. The proposed 640×480 FDS is designed through a 0.11μm CMOS technology with a 7μm pixel pitch. According to the sim-ulation results,the offset of the proposed column-parallel event coding circuit is suppressed from 7.37 mV to 264μV. The FPN of the sen-sor is reduced from 0.75％ to 0.096％. The sensor operates at 120 frame/s with the power consumption of 0.441 nJ/pixel×frame. The re-sults show that the sensor can compute temporal-difference images with low FPN.关键词
帧差型传感器/全局快门/固定模式噪声/失调抑制/成像质量/CMOS图像传感器Key words
frame difference sensor/global shutter/FPN/offset suppression/imaging quality/CMOS image sensor分类
信息技术与安全科学引用本文复制引用
杨政绪,徐江涛,高志远..一种具有失调抑制技术的全局快门帧差型传感器[J].传感技术学报,2023,36(3):337-347,11.基金项目
国家自然基金重点项目(62134004)This work was supported by the National Natural Science Foundation of China under Grant(62134004) （62134004）
