| 航天TDICCD相机视频信号处理中相关双采样技术的研究 |
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| 引用本文： | 黄巧林,金伟其,朱敏. 航天TDICCD相机视频信号处理中相关双采样技术的研究[J]. 航天返回与遥感, 2002, 23(4): 17-25 |
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| 作者姓名： | 黄巧林 金伟其 朱敏 |
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| 作者单位： | 北京理工大学光电工程国家重点实验室,北京,100081 |
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| 摘 要： | 分析了TDICCD视频信号读出时复位噪声的产生机理 ,并从噪声互消及数学相关性原理出发 ,分析了TDICCD输出视频信号的采样技术———相关双采样 ;讨论了相关双采样技术的工作原理及其对TDICCD读出噪声 (包括TDICCD的复位噪声、水平时钟驱动及电源地线耦合串扰噪声、输出放大器的白噪声和 1/f噪声复位噪声 )的滤除作用 ,给出了相关双采样技术在实际应用中的电路实现。最后 ,并通过实验加以验证 ,TDICCD信号的输出信噪比 (S/N)能达到 4 8dB。
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| 关 键 词： | TDICCD 相关双采样 复位噪声 |
| 文章编号： | 1009-8518(2002)04-0017-09 |
| 修稿时间： | 2002-10-12 |
TDICCD Video Data Sampling Technique for Space Remote Sensing Camera |
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| Huang Qiaolin,Jin Weiqi,Zhu Min. TDICCD Video Data Sampling Technique for Space Remote Sensing Camera[J]. Spacecraft Recovery & Remote Sensing, 2002, 23(4): 17-25 |
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| Authors: | Huang Qiaolin Jin Weiqi Zhu Min |
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| Abstract: | The paper analyzes the generated mechanism of the reset noise when reading out the TDICCD video signal It also states a sampling technique for TDICCD output video signal, the Correlative Double Sampling (CDS) technique, which is on the basis of noises canceled-each-other and the mathematics correlative theory The paper introduces the operation principle of the CDS technique and its filtering effects on the output noise of TDICCD (which includes the reset noise of TDICCD, the coupled cross-talk noise between the horizontal clock drive and the ground-wire of power supply, the white noise of output amplifier and the reset noise of 1/f noise) The paper gives a electric circuit of CDS that is applied practically At last, it verified the conclusion that the output S/N of TDICCD signal can attain to 48 dB |
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| Keywords: | TDICCD Correlated double sampling (CDS) Reset noise |
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