摘 要
本文设计是程控增益放大器。说明了程控增益放大器的结构和功能及其主要的特点。最后举出了实用电路。
本系统以MCS-51单片机及其扩展，多路转换开关，数控增益放大器等构成了实用性较强的硬件电路。放大器是应用最广泛的一类电子线路。它的功能是将输入信号进行不失真地放大。在广播，通信，自动控制，电子测量等各种电子设备中，放大器是必不可少的组成部分。在各类电子仪器和设备所采用的电子线路中，集成运算放大器是应用最普遍的模拟电子器件。集成运放配上不同的反馈网络和采用不同的反馈方式，就可以构成功能和特性完全不同的各种集成运放电子电路，简称运放电路。这些运放电路是各种电子电路中的最基本的组成环节。
本系统能够实现增益由程序控制，能够满足各项技术指标，测量准确，工作可靠，性能价格比较高。
关键词：放大器，多路转换开关，MCS-51单片机
Summary
This text design is a distance to control to increase benefit enlarger.Elucidation the distance control structure and function of increase the benefit enlarger and it be main of characteristics.The end enumerated practical electric circuit
This system with the MCS-51 list slice machine and it expand, many road conversion switch, number control to increase benefit enlarger etc. constitute the function stronger hardware electric circuit.Enlarger is application the extensive electronics circuit.It of the function carry on importation signal not to lose to really enlarge.At the broadcasting, correspondence, auto control, the electronics measure etc. various electronics equipments in, the enlarger be a constitute of essential to have part.In every variety the electronics circuit for adopt of electronics instrument and equipments, integration operation enlarger is application the most widespread of imitate electronics spare
part.Integration the luck put to go together with up the feedback way of the feedback network and adoption dissimilarity of dissimilarity, can constitute function and characteristic be various totally different integration luck turn on electricity sub- electric circuit, brief name luck turn on electricity road.These lucks' turning on electricity road is in various electronics electric circuit of most basically constitute link.
This system can realization increase a benefit from the procedure control, can satisfy each item technique index sign, measure accurate, work credibility, function price more Gao.
Keyword:Enlarger, many road conversion switch, MCS-51 list slice machine
目录 前言 第一章 1．1 1．2 第二章 第三章 第四章
MCS-51单片机及其扩展
MCS-51系列单片机系统结构 MCS-51单片机的扩展 多路转换开关简介
数控增益放大器的基本原理 测量放大器
4．1 测量放大器的原理 4．2 测量放大器的选择
4．3 测量放大器在数控增益放大器中的应用
第五章 数控增益放大器实例
5．1 PFA100多路输入数控增益运算放大器 5．2 AD612/614数控增益测量放大器 5．3 程序示例
结束语 致谢
参考文献