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| 用于视觉假体的新型高动态范围图像传感器像素单元电路设计 | |
| 引用本文： | 隋晓红,高勇,赵阶喜,杨媛,任秋实.用于视觉假体的新型高动态范围图像传感器像素单元电路设计[J].电子学报,2011,39(8):1800-1804. |
| 作者姓名： | 隋晓红 高勇 赵阶喜 杨媛 任秋实 |
| 作者单位： | 1. 上海交通大学生物医学工程学院,上海,200240 2. 西安理工大学自动化与信息工程学院,陕西西安,710048 3. 上海交通大学生物医学工程学院,上海200240;西安理工大学自动化与信息工程学院,陕西西安710048 4. 北京大学工学院,北京,100871 |
| 基金项目： | 国家自然青年科学基金，国家973重点基础研究发展计划，陕西省自然科学基金 |
| 摘 要： | 针对于视觉假体的应用领域,本文提出了一种新型的高动态范围的CMOS图像传感器(CMOS Image Sensor,CIS)像素单元电路,该电路采用了列共用单元的条件溢出电容和多次积分技术,大大提高了图像传感器的动态范围,同时使其在低光照时保持较高的灵敏度和信噪比,采用了特许半导体公司的0.35μm CMOS工艺参数对该... |
| 关 键 词： | 视觉假体 图像传感器 高动态范围 条件溢出电容 |
| 收稿时间： | 2010-06-22 |
Circuit Design of High-Dynamic-Range Image Sensor Pixel for Visual Prostheses |
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| SUI Xiao-hong,GAO Yong,ZHAO Jie-xi,YANG Yuan,REN Qiu-shi.Circuit Design of High-Dynamic-Range Image Sensor Pixel for Visual Prostheses[J].Acta Electronica Sinica,2011,39(8):1800-1804. | |
| Authors: | SUI Xiao-hong GAO Yong ZHAO Jie-xi YANG Yuan REN Qiu-shi |
| Affiliation: | 1. School of Biomedical Engineering,Shanghai Jiaotong University,Shanghai 200240,China;2. School of Automation and Information Engineering,Xi'an University of Technology,Xi'an,Shaanxi 710048,China;3. College of Engineering,Peking University,Beijing 100871,China |
| Abstract: | A novel pixel circuit of high dynamic range CMOS image sensor (CIS) was presented for the applications of visual prosthesis,which used the conditional overflow capacitors and multiple integration technologies to achieve high dynamic range,high sensitivity and high signal to noise ratio (SNR) requirements.The designed circuit was simulated using Chartered Semiconductor 0.35 μm CMOS process model parameters,the simulating results showed that the dynamic range was increased by about 62dB than the traditional 4 Transistor Active Pixel Sensor (4T APS) circuit,and the SNR and sensitivity were as high as the 4T APS in weak signal conditions. |
| Keywords: | visual prosthesis CMOS image sensor dynamic range conditions overflow capacitors |
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