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中文摘要: 提出一种新型叶尖定时信号高精度处理方法。采用固定频率脉冲填充方法, 并基于CPLD、FIFO、EPP 的融合
技术, 实现10 ns 的叶尖定时分辩力。利用CPLD 设计了24 位高速同步计数锁存电路, 引入光通信用放大芯片设计
了高灵敏度、宽频带光电接收预处理电路, 并设计了高速EPP 接口电路及软件。在实验室条件下对处理系统进行
了功能验证, 实验证明该系统可以实现0??4 ??W 的弱光检测。
Abstract:A new accurate processing technique for tip??timing signal is proposed. The fixed frequency pulse f illing
method, and the combination of CPLD, FIFO and EPP are adopted to realize 10 ns tip??timing accuracy. CPLD is used
for design 24 bit high??speed synchronized counter and latch circuit ; the preamplifer and postamplifier are used for design
high sensitivity, large bandwidth photoelectric receiver. In addition, EPP interface circuit and corresponding software de??
sign are provided. The processing system are proved under the laboratory condition, and the result of experiments indicate
that the system can realize the detection of weak light as low as 0??4 ??W.
keywords: tiptiming photoelectric receiving CPLD data processing
文章编号：cg030409 中图分类号： 文献标志码：
基金项目:
SUN Yu??yang DUAN Fa??jie FANG Zhi??qiang YE Sheng??hua
State Key Laboratory of PrecisionMeasuring Technology and Instruments , Tianj in University , Tianjin 300072, China
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