单片机与嵌入式系统应用2013，Vol.13Issue(5)：48-51,4.
用于X射线传感器的多通道微弱电流采集系统
Multi-channel Weak Current Acquisition System for X-ray Sensor
摘要
Abstract
To rapidly acquire photocurrents of 6 × 6 photodiode arrays on scintillation layer of integrated chip which are excited by pulsed X-ray in X-ray senor,a multi-channel weak current rapid acquisition system is proposed.The system consists of low leak current multiplexer,high accuracy current mirror and microcontroller.It reads weak current values of the 36 channels sequentially under the control of microcontroller,and the data are sent to PC for display after A/D conversion.The experimental results show the system has the accuracy of 1 nA,meeting the requirement of rapid acquisition of multi-channel weak current for X-ray sensor.关键词
X射线传感器/多通道微弱电流/高精度Key words
X-ray sensor/ multi-channel weak current/ high accuracy分类
信息技术与安全科学引用本文复制引用
许超群,孙颖,朱大中,韩雁..用于X射线传感器的多通道微弱电流采集系统[J].单片机与嵌入式系统应用,2013,13(5):48-51,4.基金项目
国家自然科学基金资助项目(项目编号:61076075). （项目编号:61076075）
