帧转移型面阵CCD驱动电路的设计

本文采用帧转移型面阵CCD FT18作为传感器件，设计了一种高帧频大面阵CCD的驱动电路。这种高速驱动电路能够保证在跟踪视频不变的情况下增加成像系统的视场角，满足了大视场搜索目标的要求。本文在介绍面阵CCD FT18的结构和特点的基础上，完成了FT18的时序电路和功率驱动电路的设计，并采用相关双采样(CDS)技术滤除了视频信号中的相关噪声，提高了系统的信噪比。系统在设计完后进行了辐射定标，从定标实验数据可以看出CCD响应度为线性，验证了驱动电路工作正常。整个系统采用现场可编程门阵列（FPGA）作为核心控制器件，完成自上而下的模块化设计，实现了硬件设计的软件化，提高了开发效率。

Design of driving circuit for frame transfer area CCD area CCD

A kind of circuit used in driving large area CCD of high frame frequency was designed, and it used frame transfer area CCD FT18 as sensor. This kind of high speed driving circuit can increase the angle of visual field with the constant condition of video in trail, and solve the requirement of the big visual field of searching goal. First, the structure and the specification of area CCD FT18 sensor are introduced in this paper, then the circuits of working clock and power driver for the sensor are proposed. The noises of the video signal (KTC noise and 1/f noise) are filtered by using the correlated double sampling (CDS) technique, and the signal-to-noise ratio of the system is also enhanced. Radiation scale has been done after design. According to the scale experiment data, it is linear to be able to find out CCD to respond degree, have verified drive circuit work normal. Entire system adopts the Field Programmable Gate Array ( FPGA ) as key controller, and hardware is designed by the software which is based on the modularization design method from top to bottom. The development efficiency has been enhanced.