摘要
介绍一种简单的方法把普通可调三端稳压集成电路改为高稳定度恒流电源，用于高能二次电子发射系数测量系统的磁聚焦中，也可用于扫描电子显微镜等，其稳定度可达１０ － ４ ．
A simple method to change an ordinary adjustable voltage regulator IC to a very stable constant current source is reported.Its stability has been reached to 10 -4 .It is used in the magnetic focusing system in the measuring system of high energy secondary electron emission and scan electron microscope.
出处
《大学物理》
2000年第2期30-31,共2页
College Physics
关键词
二次电子发射系数
恒流电源
磁聚焦
secondary electron emission
constant current source
magnetic focusing
