| 负反馈放大器闭环特性的再研究 |
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| 引用本文： | 李永安,郗艳华.负反馈放大器闭环特性的再研究[J].电气电子教学学报,2004,26(3):31-33,36. |
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| 作者姓名： | 李永安 郗艳华 |
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| 作者单位： | 咸阳师范学院,物理学系,陕西,咸阳,712000;咸阳师范学院,物理学系,陕西,咸阳,712000 |
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| 摘 要： | 关于负反馈放大器，已有文献解决了与每种组态相关的一种增益及输入、输出电阻的计算，但没有考虑源增益及与一种组态相关的另外三种增益的计算，影响了该理论对实际应用的指导。为此，本文在文献(1)的基础上，以电压并联负反馈放大器为例，利用解析法导出了与每种组态相关的四种增益、源增益及输入、输出电阻的关系式，全面总结了负反馈放大器的闭环参数与开环参数之间的关系，所得公式物理意义明确，讲清了相关文献未明确的问题。
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| 关 键 词： | 负反馈放大器 闭环特性 解析法 |
| 文章编号： | 1008-0686(2004)03-0031-04 |
The Restudying on Closed-loop Characteritic of a Negative-feedback Amplifier |
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| LI Yong an,XI Yan hua.The Restudying on Closed-loop Characteritic of a Negative-feedback Amplifier[J].Journal of Electrical & Electronic Engineering Education,2004,26(3):31-33,36. |
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| Authors: | LI Yong an XI Yan hua |
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| Abstract: | The calculation of one kind of gain, input and output resistance related to every kind of feedback configuration has been given concerning negative feedback amplifier, but it has not considered the calculation the source gain and other three kinds of gains related to every configuration, and it influences the guidance to practice. Taken the negative feedback amplifier in circuit of voltage connected in parallel for example, the relation of the four kinds of gain, source gain, input and output resistance has been given by the analytical method based on the paper 1, and it describes the relation between closed loop and open loop parameter adequately. The given relation possesses clear physical meaning, and it solves un answered problems in related papers. |
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| Keywords: | negative-feedback amplifier closed-loop characteristics analytical method |
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