同位素源X射线荧光分析仪的自稳电路设计与改进  

The design and improvement of auto stable circuit in isotope source X-ray fluorescence analysis instrument

作　　者：吴建平[1] 吴春蓉[1] 吴军龙[1] 

机构地区：[1]成都理工大学应用核技术与自动化工程学院,四川成都610059

出　　处：《核电子学与探测技术》2005年第6期630-633,共4页Nuclear Electronics & Detection Technology

摘　　要：介绍的数字控制放大器自稳电路,是针对同位素源X射线荧光分析仪中自稳调节时,希望放大器增益步长选择在较小范围变化,并且要求对放大倍数精细调节,达到仪器谱线的准确跟踪。本设计提供了这种数控放大的一种方案,其倍数的调节步长可做到0.001倍。This can realize the automatic change to switch over instrument amount. In addition, the method to change the gain makes the function systematically strengthen, for example, during nuclear measurement, one of the methods of the steady table is to change and input the multiple of enlarging of the signal. This needs to use a figure control amplifier, being directed against the concrete problems that nuclear instrument wants to solve, the special requests to amplifier are proposed ： 1. to enlarge multiple change, 2. to enlarge multiple regulated and required meticulously within the specific limit. This tect offers a kind of design plan by this kind of numerical control enlargement. The range of multiple enlarged is 9-9. 999,and its regulation of multiple is 0. 001 times.

关 键 词：自稳 谱线 数控放大 D/A转换 

分 类 号：TL818.7[核科学技术—核技术及应用]