| 利用虚接概念分析反馈放大电路的拆环问题 |
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| 引用本文： | 童诗白. 利用虚接概念分析反馈放大电路的拆环问题[J]. 电气电子教学学报, 2000, 22(2): 27-31 |
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| 作者姓名： | 童诗白 |
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| 作者单位： | 清华大学自动化系!北京:100084 |
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| 摘 要： | 本文提出“虚接”的概念，利用此概念可以解决反馈放大电路在拆环时反馈网络F对基本放大电路A的负载效应问题和单向化问题。拆环后所得到的A和F的物理意义清楚，方法简单：代入通用公式后，其结果与用解析法得出的完全一致。
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| 关 键 词： | 反馈放大电路 拆环 虚接 电子电路 |
The Exact Evaluation of A and F of a Feedback Amplifier by Virtual Connection Concept |
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| Tong Shibai. The Exact Evaluation of A and F of a Feedback Amplifier by Virtual Connection Concept[J]. Journal of Electrical & Electronic Engineering Education, 2000, 22(2): 27-31 |
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| Authors: | Tong Shibai |
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| Abstract: | It is well known that the operation principle of a single loop feedback amplifier can be represented by a block diagram consisting of basic amplifier A and feedback network F. Usually,the evaluation of A and F is carried out by means of 4-terminal network theory. However,since an assumption is made in making F unidirectional,the result of the evaluation will not be accurate,and in some particular cases,the error is not negligible. In this paper,by introducing a new concept namely virtual connection,the result can be exact and identical with that obtained from analytical method. The rules of separating F form A and the expression of A thus formed are simple too. |
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| Keywords: | feedback amplifier analysis separation of A and F form the feedback loop virtual connection |
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