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对指数采样CMOS图像传感器动态范围扩展方法的改进

An Improvement of Extending Dynamic Range Method of CMOS Image Sensor Based on Index Time Sampling
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摘要 为了进一步减少CMOS图像传感器的采样次数,系统分析了基于指数时间采样扩展CMOS图像传感器动态范围的基本方法,并对其进行了改进,提出了通过合理选取采样时间,可以进一步减少采样次数的方法.在此基础上,提出了一种新型的电路实现结构,采用此方法在每个积分周期采样N/2+1次(N为大于零的偶数),最大可以扩展CMOS图像传感器动态范围2N倍,较以往的方法减少采样N/2次.最后,在CSM 0.35μm 2P4M 3.3V的工艺下,利用Hspice软件进行仿真实验,证明了此方法的有效性. For the purpose of further reducing the times of sampling of CMOS image sensor,systemically analyze and amend the extending dynamic range method of CMOS image sensor based on index time sampling.Propose that the times of sampling can be further reduced by means of properly selected sampling time,based on this method,a new circuit structure is proposed.By adopting this method,it samples only N/ 2＋1 times in each integral period,and the dynamic range of CMOS image sensor can be extended by 2N.Reduce N/ 2 times comparing to former methods.Finally,simulation experiment is implemented using Hspice with technology of CSM 0.35μm 2P4M 3.3V,and simulation results demonstrates that the new method is effective.
作者 张小波 卢结成 鄢铭 朱青云
机构地区 中国科学技术大学电子科学与技术系
出处 《微电子学与计算机》 CSCD 北大核心 2008年第11期101-104,108,共5页 Microelectronics & Computer
关键词 CMOS图像传感器 指数时间采样 动态范围扩展 减少采样次数 CMOS image sensor index time sampling extending dynamic range reducing times of sampling
分类号 TN47 [电子电信—微电子学与固体电子学]
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参考文献7

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二级参考文献5

  • 1P Mengel, G Doemens, L Listl. Fast Range Imaging by CMOS Sensor Array through Multiple Double Short Time Integration(MDSI). Proc. IEEE International Conference in Image Processing (ICIP'2001), Thessaloniki (Greece), Oct.2001:169-172.
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共引文献4

微电子学与计算机
2008年 第11期

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