可变增益放大器的实现方法

从应用的角度出发，给出了典型的可变增益放大器的实现方法，总结了实现方法的特点，探讨了实现方法在具体应用中的一些重要的技术问题。
  中图分类号：   TN721.1；TN722                  Implementation of Variable Gain Amplifier
Zhou Shenghai，Wang Dongchen，Ma Jianzhong 
Institute of Applied Electronic Technology, Xinyang Teachers' College,Xinyang Henan 464000
Abstract： On the purpose of practical use, the implementation of typical variable gain amplifier is presented in this paper.Their characteristics are summarized, and some important technical problems in using them are studied.This is of great value to user in choosing and using variable gain amplifier correctly. Key Words： Operational Amplifier，Variable Gain Amplifier，Microprocessor(μP)，Programmable Gain Amplifier