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首先详细地介绍了几种传统时序电路的实现方法与各自存在的优缺点 ,然后对 isp L SI器件的性能特点以及 TDI- CCD相机的组成结构、工作原理进行了简要地阐述 ,最后对采用 isp L SI器件实现 CCD相机时序电路的全过程进行了全面、细致地分析。本文结合实际课题 ,已由在线可编程大规模逻辑器件实现了高速 TDI- CCD相机的时序电路。此相机系统具有一些重要参数 (行周期、TDI级数、视频信号的增益、偏置参数 ) ,并可以灵活控制。同时该系统又具有高可靠性、高稳定性、低功耗等特点。
First of all, it introduces several implementation methods of traditional sequential circuits in detail and their respective advantages and disadvantages. Then, the performance characteristics of isp L SI devices and the composition and working principle of TDI-CCD cameras are briefly described. Finally, L SI device CCD camera timing circuit to achieve a comprehensive and detailed analysis. In this paper, with the actual topic, the high-speed TDI-CCD camera timing circuit has been realized by on-line programmable large-scale logic devices. The camera system has some important parameters (line cycle, TDI series, video signal gain, offset parameters), and can be flexibly controlled. At the same time the system has high reliability, high stability, low power consumption and other characteristics.