Research on High-Accuracy Programmable Timer Used in Acquiring UWB Signals  

用于超宽带信号数据采集的高精度可编程定时器研究(英文)

作　　者：苏红旗[1] 杨峰[1] 马凯[1] 康文献 

机构地区：[1]中国矿业大学,北京100083 [2]豫中地质勘察工程公司郑州基础分公司,450001

出　　处：《Applied Geophysics》2005年第2期127-130,F0003,共5页应用地球物理（英文版）

基　　金：This research is sponsored by National Natural Science Foundation of China,Special Fund of Scientific Instruments:The studyand development of flameproof ground penetrating radar (50127402).

摘　　要：UWB signal digitization depends, to a large extent, on the accuracy of sampling time. A highaccuracy programmable timer is therefore the key to implementing UWB signal data acquisition. A high-accuracy programmable timer based on the principle of ramp generators is described in this paper. The counting range of the timer is up to 16 bits, the timing precision is 8 ps, and the equivalent sampling rate is up to 50G Hz. No other identical product has been reported so far. This timer was successfully used in the data acquisition system for geological radar signals developed by us.超宽带信号的数字化在很大程度上取决于采样时刻的准确性,因此是否具有高精度的可编程定时器是实现超宽带信号数据采集的关键。本文基于斜波发生器原理实现了高精度可编程定时电路,可编程计数范围为16bit,实际最小定时单位达8ps,折合采样频率高达50GHz,迄今为止尚未有关于同样指标产品的报道。该定时器已应用于作者研制的地质雷达信号数据采集系统中,取得了很好的实际应用效果。

关 键 词：high-accuracy timing UWB signal data acquisition and ramp generator 

分 类 号：P631.33[天文地球—地质矿产勘探]