信号源内阻在模拟电路中的作用  

Action of Inside Resistance in the Signal Source on Simalator Circuit

作　　者：胡承忠[1] 吴顺伟[1] 王春玲[1] 封百涛[1] 

机构地区：[1]泰山医学院物理系,山东,泰安,271000

出　　处：《信息技术与信息化》2005年第3期107-108,共2页Information Technology and Informatization

摘　　要：本文从单级放大电路、多级放大电路、负反馈放大电路三个方面,分析了信号源内阻对电路的影响。指出多级放大器输入阻抗应尽量高,输出阻抗应尽量低;串联负反馈信号源内阻越小越好,并联负反馈信号源内阻越大越好。This article analyses influence on inside resistance in the signal source on circuit in 3 ways: monopole amplifying circuit, multilevel amplifier circuit, and negative feedback amplifier. It points out much more higher about impedance being input multilevel amplifier , much more lower about impedance being output multilevel amplifier ; It also indicates the smaller the better on inside resistance in the series connection negative feedback signal source , the bigger the better on inside resistance in the parallel connection negative feedback signal source .

关 键 词：信号源内阻 模拟电路 负反馈放大电路 单级放大电路 多级放大电路 多级放大器 并联负反馈 输入阻抗 输出阻抗 串联 

分 类 号：TN710[电子电信—电路与系统]