摘要
介绍了一种基于USB2．0接口的多通道高精度时间一数字转换器（time-to—digital converter，TDC）的设计与实现。完成了NIM-LVPECL电平转换电路、高速串并转换电路、基于FPGA的数据处理及相关逻辑控制等单元电路的设计，最后给出了TDC的测试性能指标。结果表明，TDC的最小时间分辨率为403ps，测量时间范围为0-420 us，测量“死时间”〈13ns。TDC可广泛应用于高精度的时间间隔测量领域，特别是作为飞行时间质谱仪（time-of-flight mass spectrometer，TOF—MS）的数据采集卡。
The design and the realization of a multi-channel, high resolution time-to-digital eonverter（TDC） based on USB2.0 were introduced. The NIM-to-LVPECL logic level converter, the high-speed series-to-parallel converter, and the FPGA based data process and logic control circuit are completed. In the end, some parameters of the TDC are measured and given. The parameters of the TDC show that the minimum time resolution is 403 ps, the range of measurement is 420 us, and the dead time is less than 13 ns. The TDC can be used in the fields wheh high resolution time measurement are required, for example, in the application of time-of-flight mass spectrometer（TOF-MS）.
出处
《质谱学报》
EI
CAS
CSCD
2010年第1期28-33,共6页
Journal of Chinese Mass Spectrometry Society
基金
国防科技大学研究生创新基金资助项目(s090404)
