支持像移补偿功能面阵CCD相机驱动电路系统

Driver circuit system of area CCD which supports image motion compensation

为了设计一种支持电子式像移补偿功能的高帧频大面阵CCD驱动电路,满足像移补偿功能。论文首先给出了大面阵CCDFTF5066M的基本驱动电路,然后在其基础上通过增加一个"像移补偿时序发生器"与主时序发生器SAA8103配合工作来实现电子像移补偿,给出了"像移补偿发生器"内部设计结构,所增加的像移补偿时序发生器只用于产生曝光期间所需的几个垂直转移驱动时序和转发SAA8103产生的时序信号。选择了FPGA作为像移补偿时序发生器,并且进行了时序仿真。最后对设计的驱动电路进行了室内像移补偿实验验证,取得了很好的补偿效果,该驱动电路系统支持最大帧频可达2.7 F/s,信噪比达到了66 d B。该驱动电路能方便地选择输出通道数量和输出方式,使相机适用于不同的场合。

In order to design a high frame,large array driver circuit which supports electronic image motion compensation funcition, meet the fuction of image motion compensation.First,the basicdriver circuit of the large array CCD FTF5066 M was given,and added an ＂image motion compensation timing generator whick worked together with the main timing generator SAA8103 was added to achieve the electronic image motion compensation. Then the internal structure of the ＂image motion compensation timing generator＂ was given,the additonal image motion compensation timing generator was only used to produce the vertical transfer drive timing, timing signals and tranfer the timing sigals produces by SAA8103. The FPGA as the image motion compensation timing generator was selected, and the timing simulation was done. In the end, indoor experiment of image motion compensation was given to test the driver circuit designed.The good compensation effect was achieved. The driving circuit system supported a maximum frame rate up to 2.7 F/s, signal to noise ratio reached 66 d B. This driver-circuit can conveniently select output channel number and output mode, the camera is suitable for different occasions.