128通道高精度时间数字变换模块设计  

A 128-channel High Precision Time-to-digital Conversion Module

作　　者：张仁祥 赵雷 秦家军[1,3] 郭东磊 顾金亮 ZHANG Renxiang;ZHAO Lei;QIN Jiajun;GUO Donglei;GU Jinliang(State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China;School of Microcelectronics,University of Science and Technology of China,Hefei 230026,China;Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学核探测与核电子学国家重点实验室,合肥230026 [2]中国科学技术大学微电子学院,合肥230026 [3]中国科学技术大学近代物理系,合肥230026

出　　处：《原子核物理评论》2024年第4期1025-1032,共8页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11722545);中国科学院青年创新促进会资助项目。

摘　　要：百皮秒精度的时间测量广泛运用于大型物理实验、激光测距、医疗影像等诸多领域。在这些领域中,时间数字变换(TDC)模块除了对时间精度有要求外,对集成度也有很高的要求,需要在有限的面积内实现多至百通道的TDC。考虑到模块使用前需要进行性能评估,而对如此多通道数的系统进行手动扫描测试是一项繁杂耗时的工作,因此有必要设计板载自测试功能。为此本工作主要是基于自主研发的时间数字变换专用集成电路(TDC ASIC)设计了一款具备自测试功能的128通道TDC模块,此模块兼容PXI机箱。测试结果表明,128通道TDC均能达到好于60 ps RMS的时间测量精度,且一致性较好。此外,板载自测试电路可产生符合预期的高精度测试脉冲,完成自动性能评估测试。The precise time measurement with less than 100 ps precision is widely used in various fields such as large-scale physics experiments,laser ranging,medical imaging,and so on.In these fields,the time-to-digital conversion(TDC)module requires high accuracy and integration density,and needs to implement more than 100 channels of TDC in a limited area.Considering that the performance evaluation of the module is necessary before being used,manual scanning tests of such a multichannel system are cumbersome and time-consuming.Therefore,it is necessary to design an on-board self-test function.This work is based on the self-developed TDC chip to design a 128-channel high-precision TDC module with self-test function,which is compatible with the PXI chassis.The test results show that all the 128 TDC channels can achieve a time measurement precision of better than 60 ps RMS,with a good uniformity.In addition,the on-board self-test circuit can generate highprecision test pulses as expected and complete automatic performance evaluation testing.

关 键 词：时间数字变换 高精度多通道 自测试 

分 类 号：TN792[电子电信—电路与系统]