运算放大器教学中的若干问题探析  

Discussions on Several Issues in Operational Amplifier Teaching

作　　者：田社平[1] 王润新[2] 张峰[1] TIAN Sheping;WANG Runxin;ZHANG Feng(School of Electronic,Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Logistics Engineering College,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海海事大学物流工程学院,上海201306

出　　处：《电气电子教学学报》2022年第5期75-79,共5页Journal of Electrical and Electronic Education

基　　金：上海交通大学2020年教育教学研究项目(JYJX200081);上海海事大学电路原理重点建设课程项目(WG310170)。

摘　　要：针对“电路理论”课程中运算放大器(运放)的教学,对教学内容中的若干问题进行了讨论。辨析了不同运放模型符号之间的区别,厘清了虚短和虚断概念并给出了正确表述,说明了含运放电路含“地”的必要性,探讨了对含运放电路分析结果所必须进行的校核,指出了现有运放模型在反映放大倍数频率响应方面的局限性。讨论内容对“电路理论”课中运放相关教学内容的完善有积极意义。For teaching operational amplifier(op-amp) in Circuit Theory course, several issues in op-amp teaching are discussed. This paper points out the advantages and disadvantages of different symbols of op-amps, clarifies the concept of virtual short-circuit and virtual open-circuit and gives their correct expressions, illustrates the necessity of “ground” in op-amp circuits, explores the verifications that need to be carried out on the op-amp circuit analysis results, and proposes the limitations of the existing op-amp ideal model in reflecting frequency response of its gain.The discussions are beneficial to improve the relevant teaching contents in the course of Circuit Theory.

关 键 词：运算放大器 虚短 虚断 地 

分 类 号：TM13[电气工程—电工理论与新技术]