BJT放大电路小信号等效电路图的画法教学研究  

Teaching research on drawing method of small signal equivalent circuit diagram of BJT amplification circuit

作　　者：李燕玲[1] Li Yanling(Jiaxing University Nanhu college,Jiaxing Zhejiang,314001)

机构地区：[1]嘉兴学院南湖学院,浙江嘉兴314001

出　　处：《电子测试》2020年第10期43-44,12,共3页Electronic Test

摘　　要：针对BJT放大电路分析中,小信号等效电路图的画法,本文提出了一种BJT核心法,并以共射极和共射-共基两级放大电路为例讲解。该方法以BJT小信号H简化模型为基础,从判断信号在BJT中的输入输出端入手,再完成BJT核心,最后完成周围电路的作图。该方法步骤简洁,图形利于后续分析,为学生进行复杂电路的分析提供了规范完整的作图方法。For the drawing method of small signal equivalent circuit diagram in BJT amplification circuit analysis,in this paper,a BJT core method is proposed and explained with the examples of common emitter and Common emitter-common base amplifier circuits.This method based on the small signal H simplified model of BJT,and starts with judging the input and output of the signal in BJT,then completes the BJT core,and finally completes the drawing of the surrounding circuit.This method is simple and convenient for the subsequent analysis,and provides a standard and complete drawing method for students to analyze complex circuits.

关 键 词：BJT核心法 输入输出端 小信号等效电路图 

分 类 号：TN722[电子电信—电路与系统] G642[文化科学—高等教育学]