数控测量放大器的研制  

DEVELOPMENT OF NUMERICAL CONTROL MEASURE-AMPLIFIER

作　　者：黄东平[1] 朱昌平[1] 熊邦兴 

机构地区：[1]荆州师范学院物理系,434104

出　　处：《荆州师专学报》2001年第2期74-76,共3页

摘　　要：采用低失调高增益集成运放作主放大器 ,用自制数控精密电位器作放大器的负反馈元件 ,既保证了放大器各项指标的高性能 ,又实现了放大倍数的步进调节 ,而且设计简单 ,取材容易 ,制作方便 .测试表明 ,该放大器具有共模抑制比高、非线性失真小、噪声系数低等特点 。The low-offset & high-gain OPA is used as main amplifier,and self-making accurate numerical control resistor is adopted as minus feedback path of the amplifier.So each index of the amplifier is guaranteed,at the same time,the multiple can be adjusted step by step.This amplifier is simple to design,easy to draw materials,and convenient to make.It is meliorated that the amplifier has a high common-mode rejection ratio,a low not linear distort and a low noisy coefficient.Besides,it can be set by touching and be displayed with numerical monitor.

关 键 词：测量放大器 数控电位器 数字显示 

分 类 号：TN722[电子电信—电路与系统]