一种导出负反馈放大器方框图分析的方法  

Block Diagram Analysis based on Derivation of Negative Feedback Amplifier

作　　者：陈绍荣 陈柏良 何健 薛在阳 CHEN Shao-rong;CHEN Bai-liang;HE Jian;XUE Zai-yang(Communication Sergeants College,PLA Army Engineering University,Chongqing 400035,China;Shenzhen Weixin Technology Co.,Ltd.,Shenzhen Guangzhou 518000,China;Military Representative Office of the Military Representative Bureau in Chengdu,Military Commission Equipment Development Department,Chengdu Sichuan 610041,China;AT&S Technology(Chongqing)Co.,Ltd.,Chongqing 401133,China)

机构地区：[1]陆军工程大学通信士官学校,重庆400035 [2]深圳市惟新科技股份有限公司,广州深圳518000 [3]军委装备发展部军事代表局驻成都地区军事代表室,四川成都610041 [4]奥特斯科技(重庆)有限公司,重庆401133

出　　处：《通信技术》2019年第2期476-481,共6页Communications Technology

基　　金：重庆高校创新团队建设计划资助(No.KJTD201343)~~

摘　　要：提出了一种导出负反馈放大器方框图分析的方法。以电压并联负反馈放大器为例,基于替代定理将反馈电阻用理想电流源替代,并将理想电流源进行转移,然后将转移后的理想电流源并联在放大器的输入端和输出端。考虑到并联在放大器输入端和输出端的理想电流源由两部分组成,可以将其一分为二。经分别处理后,不仅得到了忽略直通效应的电压并联负反馈放大器的方框图,而且揭示了反馈网络对基本放大器的影响。最后,利用方框图法分析了电压并联负反馈放大器的主要性能指标。A method of block diagram analysis based on derivation of negative feedback amplifier is proposed.Firstly,the voltage shunt negative feedback amplifier is taken as an example,and based on the substitution theorem,the feedback resistance is replaced by an ideal current source,and then the ideal current source is transferred,and then the ideal current source is connected in parallel to the input and output of the amplifier.And by considering that the ideal current source in parallel at the input and output of the amplifier is composed of two parts,it can be divided into two parts and processed separately,from which both the block diagram of voltage shunt negative feedback amplifier ignoring the straight-through effect is obtained and the influence of the feedback network on the basic amplifier revealed.Finally,the main performance indexes of voltage shunt negative feedback amplifier are analyzed by using the block diagram method.

关 键 词：替代定理 理想电流源转移 直通效应 性能指标 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]