中文摘要：

使用像增强型电荷耦合器件（intensified charge coupled device，IccD）相机系统时，需要对像增强器的选通时刻、选通宽度以及增益大小进行控制。将现场可编程逻辑门阵列（field programmable gate array，FPGA）和专业数字延时芯片AD9501配合使用，可以产生延时和脉宽均可大动态范围、高分辨数字调节的脉冲，同时保证延时精度，从而精确控制像增强器的选通时刻和选通宽度；利用FPGA控制数字电位器MCP42010，调节像增强器微通道板两端高压，可实现对像增强器增益的控制；采用RS485总线方式完成上位计算机与FPGA的远程通信，可实现程控功能。程控电路输出的选通脉冲，其延时动态范围为110ns～4．3ms，脉宽动态范围为0～4．3ms，分辨率均为65ps，脉冲延时抖动的均方根不大于147ps；实现了256挡位的增益调节。

英文摘要：

The parameters of image intensifiers should be controlled for use in intensified CCD （IC- CD） cameras, including gate delay, gate width and gain. A digital delay generator of high precision with a large dynamic range and a high resolution is achieved by using FPGA combined with AD9501. The digital delay generator determines the gate delay and the gate width. The gain of im- age intensifier is adjusted by high voltage microehannel plate. The high voltage module is controlled by the digital potentiometer MCP42010, and the digital potentiometer is controlled according to the order from FPGA. The program control circuit communicates with computer through RS485. The dynamic range of the digital delay is 110 ns~4.3 ms, the pulse width 0~4.3 ms, and their resolu- tion 65 ps. The root mean square of jitter of the digital delay is no more than 147 ps. The gain of image intensifier can be adjusted in 256 levels.