高速CCD成像电路抗串扰技术 -

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高速CCD成像电路抗串扰技术

中国科学院长春光学精密机械与物理研究所,吉林长春130033

基金项目:

国家自然科学基金资助项目(No.61036015)

详细信息

作者简介:
薛旭成(1980-),男,河北阳原人,博士,副研究员,主要从事光电成像及处理技术方面的研究。 E-mail:xue0818@163.com 李洪法(1979-),男,山东莱州人,硕士,助理研究员,主要从事CCD成像电子学方面的研究。 E-mail:lihongfa99058@163.com 郭永飞(1961-),男,吉林长春人,研究员,博士生导师,主要从事光电技术应用、CCD成像电子学、嵌入式系统开发等方面的研究。E-mail:guoyf@ciomp.ac.cn
薛旭成(1980-),男,河北阳原人,博士,副研究员,主要从事光电成像及处理技术方面的研究。 E-mail:xue0818@163.com 李洪法(1979-),男,山东莱州人,硕士,助理研究员,主要从事CCD成像电子学方面的研究。 E-mail:lihongfa99058@163.com 郭永飞(1961-),男,吉林长春人,研究员,博士生导师,主要从事光电技术应用、CCD成像电子学、嵌入式系统开发等方面的研究。E-mail:guoyf@ciomp.ac.cn
薛旭成(1980-),男,河北阳原人,博士,副研究员,主要从事光电成像及处理技术方面的研究。 E-mail:xue0818@163.com 李洪法(1979-),男,山东莱州人,硕士,助理研究员,主要从事CCD成像电子学方面的研究。 E-mail:lihongfa99058@163.com 郭永飞(1961-),男,吉林长春人,研究员,博士生导师,主要从事光电技术应用、CCD成像电子学、嵌入式系统开发等方面的研究。E-mail:guoyf@ciomp.ac.cn

中图分类号:TN386.5
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出版历程
- 收稿日期:2011-09-06
- 修回日期:2011-11-18
- 刊出日期:2011-12-25

Anti-crosstalk techniques for high-speed CCD imaging circuit

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

摘要

摘要:为了解决高速CCD成像电路串扰问题,分析了产生串扰的原因,建立了CCD成像电路的串扰模型,提出了有效的抗串扰技术。对多通道的CCD视频信号采用带状线而非微带线并使用防护布线进行隔离。对多通道的电源供电进行了隔离,设计并采取有效的去耦电容布线方法,降低了寄生电感,避免了由电源公共阻抗引起的串扰。采用统一的地平面,对模拟电路和数字电路进行分区布局,避免了地弹对信号的影响。针对一个串扰较严重的CCD成像电路进行了实验,结果表明:采取上述抗串扰技术后,通道隔离度大于60 dB,有效降低了串扰, 提高了图像质量。
- 高速CCD/
- 成像电路/
- 串扰/
- 传输线
Abstract:In order to overcome the crosstalk of a high speed CCD imaging circuit, the reasons of the crosstalk are analyzed and the crosstalk models of CCD imaging circuit are established. The striplines instead of microstrips are used for the multi-channel CCD video signals and the guard lines are used for the striplines to isolate further. To reduce the crosstalk caused by the common impedance of a power supply, the isolated multi-channel power supplies are designed and the effective routing method for decoupling capacitors is used to lower parasitic inductances. The analog and digital parts are layout separately and a whole ground plane is used to reduce the ground bounce. Experiments for a CCD imaging circuit with much severe crosstalk problems are performed by these techniques, results show that the channel isolation is large than 60 dB. The crosstalk is reduced efficiently and the image quality is improved.
- high speed CCD/
- imaging circuit/
- crosstalk/
- transmission line

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