应用地球物理（英文版）
應用地毬物理（英文版）
응용지구물리（영문판）
APPLIED GEOPHYSICS
2005年
2期
127-130
,共4页
苏红旗%杨峰%马凯%康文献
囌紅旂%楊峰%馬凱%康文獻
소홍기%양봉%마개%강문헌
高精度定时%超宽带信号%数据采集%斜波发生器
高精度定時%超寬帶信號%數據採集%斜波髮生器
고정도정시%초관대신호%수거채집%사파발생기
high-accuracy timing%UWB signal%data acquisition%and ramp generator
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.
超寬帶信號的數字化在很大程度上取決于採樣時刻的準確性,因此是否具有高精度的可編程定時器是實現超寬帶信號數據採集的關鍵.本文基于斜波髮生器原理實現瞭高精度可編程定時電路,可編程計數範圍為16bit,實際最小定時單位達8ps,摺閤採樣頻率高達50GHz,迄今為止尚未有關于同樣指標產品的報道.該定時器已應用于作者研製的地質雷達信號數據採集繫統中,取得瞭很好的實際應用效果.
초관대신호적수자화재흔대정도상취결우채양시각적준학성,인차시부구유고정도적가편정정시기시실현초관대신호수거채집적관건.본문기우사파발생기원리실현료고정도가편정정시전로,가편정계수범위위16bit,실제최소정시단위체8ps,절합채양빈솔고체50GHz,흘금위지상미유관우동양지표산품적보도.해정시기이응용우작자연제적지질뢰체신호수거채집계통중,취득료흔호적실제응용효과.
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.
