科学级紫外CCD电路系统设计

为了获取高质量高帧频紫外图像数据，设计了一套基于科学级紫外CCD的成像电路系统。整个系统以E2V公司CCD57-10图像探测器为核心，以Microsemi公司低功耗FPGA—A3PE3000L为逻辑控制单元进行展开。首先，给出了系统的总体设计方案，分析了CCD57-10 的工作特性，并设计了一套性能可靠的硬件电路系统；分析了CCD探测器的时序关系并确定了详细的时序参数，在不影响探测能力前提下，为了提高系统帧频，设计上采用了CCD开窗工作模式；通过优化时序设计，在FPGA内完成了不同曝光时间工作模式的自适应。实验结果表明，系统在200KHz读出频率,256*256开窗条件下，帧频可达3f/s，读出噪声低至10个电子，具有较好的性能。成像系统性能稳定、可靠性高，设计理念具有较好的可扩展性。

Design of Scientific Grade Ultraviolet CCD Circuit System

In order to obtain high quality and high frame frequency ultraviolet image, this paper presents a set of scientific CCD imaging circuit system. The system takes E2V CCD57-10 as the image detector and uses Microsemi A3PE3000L as logic control unit to complete the design. First of all, the main scheme of the system was given, then the work characteristics of the CCD57-10 was described and a better performance hardware circuit was design; The timing relationships of CCD was analyzed and the detailed timing parameters were determined. In order to optimize the frame frequency and detect sensitivity, CCD windowing design was adopted; Lastly, an improved CCD drive timing was used to adapt to different exposure time. Experimental results proved that when taking 200KHz read frequency and 256*256 windowing, frame frequency of the system can reach 3f/s and noise equivalent signal of the whole circuit is less than 10e-.The imaging system characterizes good performance, high reliability, and provides good expansibility.