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提出了一种高集成度TDI CCD焦平面系统,成功应用TDI CCD驱动单元厚膜集成模块完成了具有16路CCD信号输出、像元读出频率20 MHz的高集成度高速多光谱TDI CCD焦平面系统的研制。通过采用双通道CCD信号处理模拟前端、厚膜集成驱动单元模块、高速LVDS图像数据传输接口以及机、电、热一体化仿真设计方法,极大提高了TDI CCD焦平面系统的集成度,降低了系统互连的复杂程度。系统共有4路图像数据传输接口,单路传输能力达到1.6~2.5 Gbps,最高可实现10 Gbps的图像数据带宽,在保证高数据率的同时,提高了数据传输的抗干扰能力。阐述了系统设计方案及多光谱TDI CCD探测器工作原理,并对其中的机电集成设计、驱动单元厚膜集成技术以及高速串行传输总线等关键技术进行了分析描述。通过采用TDI CCD传函测试片对系统进行了测试,焦平面全系统调制传函平均为0.511。
A highly integrated TDI CCD focal plane system is proposed. The TDI CCD driver unit thick film integrated module has been successfully applied to complete a highly integrated multi-spectrum TDI CCD focal plane with 16 CCD signals and a pixel reading frequency of 20 MHz System development. The integration of TDI CCD focal plane system has been greatly improved by using dual-channel CCD signal processing analog front end, thick film integrated drive unit module, high-speed LVDS image data transmission interface, and the integrated simulation of machine, electricity and heat. The complexity of system interconnection. The system has a total of four image data transmission interface, single transmission capacity of 1.6 to 2.5 Gbps, up to 10 Gbps image data bandwidth, while ensuring high data rates, improve the anti-interference ability of data transmission. The design of the system and the working principle of multichannel TDI CCD detector are expounded. The key technologies such as integrated mechanical and electrical design, thick film integration of driver unit and high-speed serial transmission bus are analyzed and described. The system was tested by using TDI CCD transfer test piece, the average of the system-wide modulation transfer letters of focal plane was 0.511.