| 基于相关双采样的接触式图像传感器的噪声抑制 |
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| 引用本文： | 张文普,袁祥辉,贺国权.基于相关双采样的接触式图像传感器的噪声抑制[J].重庆大学学报(自然科学版),2004,27(1):21-24. |
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| 作者姓名： | 张文普 袁祥辉 贺国权 |
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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,400030;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,400030;涪陵师范学院,重庆,408003 |
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| 摘 要： | 介绍了接触式图像传感器CIS的简要原理和CIS中存在的噪声类型,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(CPLD)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CIS 噪声类型 噪声抑制 时序关系 相关双采样 |
| 文章编号： | 1000-582X(2004)01-0021-04 |
| 修稿时间： | 2003年10月3日 |
The Technique of Suppressing Noise for Contact Image Sensor Based on Correlated Double Sampling |
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| ZHANG Wen-pu.The Technique of Suppressing Noise for Contact Image Sensor Based on Correlated Double Sampling[J].Journal of Chongqing University(Natural Science Edition),2004,27(1):21-24. |
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| Authors: | ZHANG Wen-pu~ |
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| Institution: | ZHANG Wen-pu~ |
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| Abstract: | The simple principle of Contact Image Sensor (CIS) and the noise types existed in CIS are introduced. The theory of suppressing these noise types for CIS by using Correlated Double Sampling(CDS) is described,and the timing relationship between driving signals CP/SP that CIS required and sampling-holding signals SH1/SH2 are also analyzed,these signals are produced by using Complex Programmable Logic Device(CPLD). CDS circuit principle is analyzed,and experiment of suppressing noise for CIS based on CDS is made. The experiment shows that satisfying results are obtained by using the technique of suppressing noise for CIS based on CDS. |
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| Keywords: | contact image sensor (CIS) noise types noise suppression timing relationship correlated double sampling(CDS) P |
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