一种简明的模拟电路中频解析分析法的研究

Research to a Concise Mid-Band Analytic Analyzing Method for Analog Circuits

摘要: 在对中频模拟电路(分立或集成的)进行研究和分析时，相比基于经验的定性分析法，能够用小信号解析分析方法得到所需要的参数的准确值是至关重要的。传统的分析方法在有源器件数目增多时变得越来越复杂，甚至无法进行下去；为此，该文研究和验证了一种基于戴维宁和诺顿等效电路及Mason信号流图的方法。它简明有效，结果正确，物理意义清晰；其避免了传统方法写很多回路电压或节点电流方程进行求解的繁琐。因而有必要对其进行系统地研究和应用。该文通过将其与传统方法的结论对比，以及用Multisim仿真的手段，验证了它是正确的。并且其可用于各种类型的模拟电路，在实际工作中是一个有力手段。

Abstract: When researching and analyzing mid-band analog circuits (discrete or integrated), compared with empirical qualitative analysis, it’s crucial to obtain the required accurate parameter values using small-signal analyzing method. Traditional analytical method becomes more and more complicated when the number of active devices increases that it can’t even be carried through. Thus, the paper investigated and verified a method based on Thevenin and Norton equivalent circuits and Mason signal flow graph. It is concise and effective, correct and physically clear. It avoids cumbersomeness of traditional method which proceeds by listing many loop voltage or node current equations and solving them. Thus it’s very important to systematically research it and then apply it. The paper verified that it is correct by comparing its results with those of traditional method, and with those obtained by Multisim simulations. Moreover, it is valid for various sorts of analog circuits and appears to be a powerful tool practically.