单片机控制的游标型智能放大器

Microcontroller Controlling Vernier Type Intelligent Amplifier

本文介绍一种智能放大器 ,此种放大器适合应用在智能仪器中或数据自动采集系统中。它利用单片机控制放大器的增益 ,使放大器的增益从 2°～ 2 15共有 16个可选值 ,放大器可对动态范围在 90db的输入信号用最佳增益对其进行放大 ,使得放大后输出信号落入设定的窗口范围之内。放大器能自动消除零漂的影响 ,同时放大器还可完成自动定标 ,消除放大器增益变化或增益不精确对放大器精度的影响。

Microcontoller controls amplifier using the best gains among 16 numeral gain (2 0,2 1,…2 14 ,2 15 ),so that it make the output of amplifier dripping in special range.Using microcontoller the amplifier can compensate zero drift automatically and can also clear up the bad effect of gain of the amplifier automatically,such as,gain varying,not accurate of gain and non linearity of gain.