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通过对帧转移、内线转移、TDI(时间延迟积分)、线列等多种典型CCD驱动时序的共性和差异特征进行分析,提出了一种针对CCD图像传感器驱动时序的参量化设计方法。该方法提取了驱动时序的时间、状态、周期循环次数等16个参量,根据各参量之间的逻辑关系,采用FPGA设计时序发生程序模块,通过上位机对程序模块设置参量值,可实现对工作模式、工作频率、相位延迟等时序关系的调节,达到对CCD图像传感器各路驱动时序灵活控制的目的。此设计应用于CCD图像传感器参量测试系统中,有效地提高了参量测试效率和测试系统的通用性。
By analyzing the commonalities and differences of typical CCD driving timings, such as frame transfer, interline transfer, TDI (time delay integration), and line array, a parametric design method for CCD image sensor driving timing is proposed. The method extracts 16 parameters such as time, status and cycle number of driving sequence. According to the logical relationship among the parameters, the program module is programmed by FPGA and the parameter value is set by the host computer to the program module, Mode, operating frequency, phase delay and other timing adjustment, to achieve the CCD image sensor drive timing flexible control purposes. This design is applied to the CCD image sensor parametric test system, which effectively improves the parametric test efficiency and test system versatility.