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帧转移CCD在先进高光谱遥感技术中具有非常重要的应用价值,而拖尾问题是其在高光谱成像等高帧频应用中存在的最大障碍之一。为了减小拖尾的影响,建立了驱动器、PCB传输线及CCD内部结构一体化的驱动信号传输模型,比传统模型能更准确地预测CCD内部和外部的驱动信号波形;仿真对比了各种典型参数对CCD驱动信号波形的影响,仿真与实测结果具有很好的一致性。根据仿真结果进行了高帧频帧转移CCD驱动电路的优化设计,实现了100 ns的行转移时间,在500 fps的帧频下获得了拖尾系数小于1%的驱动效果,为进一步提高CCD的工作帧频提供了保障。
Frame-shifting CCD is very important in advanced hyperspectral remote sensing technology, and the tailing problem is one of the biggest obstacles in the application of high frame rate imaging in hyperspectral imaging. In order to reduce the influence of tailing, a driving signal transmission model integrating driver, PCB transmission line and CCD internal structure is established, which can predict the driving signal waveform inside and outside the CCD more accurately than the traditional model. The simulation compares various typical parameters On the CCD drive signal waveform, the simulation and measured results have good consistency. According to the simulation results, the optimal design of CCD drive circuit with high frame rate frame transfer was realized, the transfer time of 100 ns was achieved, and the driving effect with less than 1% tailing coefficient was obtained at 500 fps frame rate. In order to further improve the CCD Working frame rate provides a guarantee.