| 接触式图像传感器噪声抑制方法研究 |
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| 引用本文： | 张文普,袁祥辉. 接触式图像传感器噪声抑制方法研究[J]. 半导体光电, 2004, 25(2): 124-127 |
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| 作者姓名： | 张文普 袁祥辉 |
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| 作者单位： | 重庆大学,光电技术及系统教育部重点实验室,重庆,400044;解放军重庆通信学院,重庆,400035;重庆大学,光电技术及系统教育部重点实验室,重庆,400044 |
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| 摘 要： | 介绍了接触式图像传感器(CIS)的简要原理和存在的噪声类型,阐述了用相关双采样来消除这些噪声的机理,分析了CIS要求的驱动信号CP、SP和采样保持信号SH1、SH2之间的时序关系,并用复杂可编程逻辑器件(CPID)来产生这几个信号.分析了相关双采样电路的工作原理,在此基础上进行了实验.实验表明,用相关双采样抑制CIS中的噪声,能够得到较为满意的结果.
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| 关 键 词： | 接触式图像传感器 噪声类型 噪声抑制 时序关系 相关双采样 |
| 文章编号： | 1001-5868(2004)02-0124-04 |
| 修稿时间： | 2003-09-10 |
Noise Suppression Technique for Contact Image Sensor Based on Correlated Double Sampling |
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| ZHANG Wen-pu,YUAN Xiang-hui Key Lab. of Optoelectron Technol. and Syst. of the Ministry of Education,Chongqing University,Chongqing ,CHN, Chongqing Communication Institute,PLA,Chongqing ,CHN. Noise Suppression Technique for Contact Image Sensor Based on Correlated Double Sampling[J]. Semiconductor Optoelectronics, 2004, 25(2): 124-127 |
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| Authors: | ZHANG Wen-pu YUAN Xiang-hui Key Lab. of Optoelectron Technol. Syst. of the Ministry of Education Chongqing University Chongqing CHN Chongqing Communication Institute PLA Chongqing CHN |
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| Affiliation: | ZHANG Wen-pu,YUAN Xiang-hui Key Lab. of Optoelectron Technol. and Syst. of the Ministry of Education,Chongqing University,Chongqing 400044,CHN, Chongqing Communication Institute,PLA,Chongqing 400035,CHN |
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| Abstract: | The principle of contact image sensor (CIS) and the noise types existed in CISwere briefly introduced. The theory of suppressing these types of noise in CIS was described byusing correlated double sampling(CDS), and the timing relationship between driving signals CP/SP that CIS required and sampling-holding signals SH1/SH2 was also analyzed, these signalswere produced by using complex programmable logic device(CPLD). The circuit principle of CDSwas analyzed,and experiment of suppressing noise in CIS based on CDS was carried out. Theexperiment shows that satisfactory results can be obtained by using the technique of suppressingnoise in CIS based on CDS. |
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| Keywords: | contact image sensor(CIS) noise types noise suppression timing relationship correlated double sampling(CDS) |
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