多通道CCD信号模拟器实现方法研究

Research on design method of multichannel CCD signal simulator

卫星相机视频处理电路CCD芯片在测试过程中容易损坏且价格昂贵,为满足卫星相机视频处理电路的测试需求,研究并设计了一种多通道CCD信号模拟器,能够模拟最多16路线阵或面阵等多种类型的CCD信号。以Xilinx公司XC5V型号FPGA为核心,采用VHDL语言实现CCD信号发生的逻辑设计,利用RS232接口接收上位机指令实现不同种类CCD信号的选择输出。实际应用表明,该模拟器具有很好的通用性和灵活性,能够满足多种卫星相机视频处理电路的测试需求。

CCDs used in video process circuit of satellite cameras are expensive and possible to be damaged while testing.To satisfy the needs for testing video process circuit of satellite cameras,a design is provided to achieve a multichannel CCD signal simulator.Up to 16 CCD signal channels can be generated.An FPGA of Xilinx XC5V was adopted to make a center unit,the logic of CCD signals generating is developed with VHDL.The RS232 interface is used to receive instructions from the host computer,and different types of signals are generated and outputted depending on the instructions.Practical applications show that the CCD simulator is flexible and can work well.The design of the CCD simulator meets the requirements of testing video process circuit in several different types of satellite cameras.