皮秒级多脉冲时间间隔大量程时间测量系统设计  

A large range time measuring system study of picosecond multi-pulse time interval

作　　者：刘琛昊 金革[2] Liu Chenhao;Jin Ge(School of Microelectronics,University of Science and Technology of China,Hefei 230026,China;Department of Modern Physics,School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学微电子学院,安徽合肥230026 [2]中国科学技术大学近代物理系,安徽合肥230026

出　　处：《电子技术应用》2022年第10期108-112,共5页Application of Electronic Technique

基　　金：国家自然科学基金(11875249)。

摘　　要：时间测量技术在激光测距、粒子鉴别、放射性核医学工程等领域中都有重要应用。本设计采用基于Altera公司的FPGA EP3C55F484C6结合时间内插技术来实现较高精度的时间数字转换器(Time-to-Digital Converter,TDC)。通过结合上位机,实现单次测量一个Start脉冲对应的多个Stop脉冲的个数可调,可以解决一次测量中有多个待测目标时需反复多次测量的问题。经过测试,设计分辨率可以达到90.08 ps,测量精度可以达到33.54 ps,积分非线性INL范围是(-0.34 LSB~+0.27 LSB),微分非线性DNL范围是(-0.28 LSB~+0.31 LSB)。Time measurement technology has important applications in laser ranging,particle identification,radioactive nuclear medicine engineering and other fields.This design uses the time interpolation technology based on FPGA EP3C55F484C6 which produced by Altera Corp to achieve high precision TDC.By combining with the upper computer,the number of stop pulses corresponding to a start pulse can be adjusted in a single measurement,which can solve the problem of repeated measurement when there are multiple targets to be measured in a measurement.After the test,the design resolution is 90.08 ps,the measurement accuracy is 33.54 ps,the integral nonlinear INL range is(-0.34 LSB~+0.27 LSB),and the differential nonlinear DNL range is(-0.28 LSB~+0.31 LSB).

关 键 词：时间数字转换器 现场可编程门阵列 多脉冲测量 进位链 

分 类 号：TN79[电子电信—电路与系统]