运算放大器教学中的若干问题探析 |
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引用本文: | 田社平,王润新,张峰.运算放大器教学中的若干问题探析[J].微电子学,2022,44(5). |
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作者姓名: | 田社平 王润新 张峰 |
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作者单位: | 1.上海交通大学电子信息与电气工程学院,2.上海海事大学物流工程学院 上海,3.上海交通大学电子信息与电气工程学院?4.上海 |
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基金项目: | 上海交通大学2020年教育教学研究项目(JYJX20 0081);上海海事大学电路原理重点建设课程项目(WG310170)。 |
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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得校核,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。
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关 键 词: | 运算放大器 虚短 虚断 地 |
收稿时间: | 2021/3/27 0:00:00 |
修稿时间: | 2021/4/13 0:00:00 |
Discussions on Several Issues in Operational Amplifier Teaching |
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Affiliation: | School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong Univ,, |
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Abstract: | 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, 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. |
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Keywords: | operational amplifier virtual short-circuit virtual open-circuit ground |
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