基于AD9978A双通道的CCD相机设计

Dual channel CCD digital camera circuit design based on AD9978A

基于ADI公司的双通道、14 bit串行输出图像预处理芯片(AFE)AD9978A设计了一套CCD黑白数字摄像机电路系统。系统采用Dalsa公司的1 024×1 024帧转移面阵CCD FTT1010M作为图像传感器,采用专用集成芯片DPP2010A作为时序发生器,以FPGA为控制核心,并应用LVDS接口完成图像输出。针对CCD双通道输出时通道间存在的不均匀性问题,使用AD9978A在电路上给出了改进,并系统研究了该芯片复杂的寄存器配置问题。经验证,该系统能在不添加任何均匀性校正算法的情况下,输出均匀性良好的双通道图像。

A set of CCD monochrome camera circuit is designed based on ADI Company＇s dual channel,14 bit HI） image signal processor with precision timing core AD9978A. The system adopts the Dalsa Company＇s 1 024×1 024 frame transfer array CCD FTT1010M as the image sensor and a special integrated chip DPP2010A as the PPG, and applies FPGA as the core of the system controller and the LVDS interface to complete the image output. According to the problem of nonuniformity between each channel after the transmission of the CCD dual channel output, the circuit is improved by using AD9978A. And the complex register allocation of this chip has been studied. After verification, the image performs good uniformity with the system in the case of none adding algorithm of nonuniformity correction.