| DM642高速图像采集系统的电磁干扰设计 |
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| 引用本文： | 高潮,李建忠,郭永彩.DM642高速图像采集系统的电磁干扰设计[J].重庆大学学报(自然科学版),2009,32(4):453-457. |
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| 作者姓名： | 高潮 李建忠 郭永彩 |
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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
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| 摘 要： | 针对高速数据采集电路中的电磁干扰问题,提出一种有效的抗干扰设计方案.利用信号传输线理论,对高速图像采集系统中影响信号完整性的反射、串扰和地弹等问题进行了理论分析,对系统电源、地、时钟、高速信号线等重点网络的电磁干扰设计进行理论指导和设计,并且对DM642与SDRAM间的高速信号线进行PCB(print circuit board)的反射、电磁干扰等仿真分析.设计中电源和地独立分层布线,尽量减少时钟线过孔,信号布线尽量等长.结果显示系统信号传输的过冲幅度小于0.7 V,电磁干扰强度在FCC标准控制范围之内.
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| 关 键 词： | 高速图像采集系统 信号完整性 PCB仿真 电磁干扰 |
| 收稿时间： | 2008/12/11 0:00:00 |
An electromagnetic interference design of a high speed image acquisition system on DM642 |
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| GAO Chao,LI Jian zhong and GUO Yong cai.An electromagnetic interference design of a high speed image acquisition system on DM642[J].Journal of Chongqing University(Natural Science Edition),2009,32(4):453-457. |
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| Authors: | GAO Chao LI Jian zhong and GUO Yong cai |
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| Institution: | Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China;Chongqing University;Chongqing 400030;P. R. China |
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| Abstract: | A novel design is presented to defend against electromagnetic interference (EMI) in a high speed data acquisition system. Problems that affect signal integrity (SI) in high speed image acquisition systems,such as reflection,crosstalk and ground-bounce,are deeply analyzed in a manner consistent with transmission line theory. The results can theoretically inform EMI design of important networks,including system power,ground,clocks,high speed wires and decoupling capacitors. Experiments simulating print circui... |
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| Keywords: | high speed image capturing system signal integrity (SI) print circuit board simulation electromagnetic interference (EMI) |
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