使用了支路追加法和导纳矩阵求逆法来形成节点阻抗矩阵，给出了两种算法的数学模型，分析了算法各自的特点和优势。
The aim of the paper is to receive nodal impedance matrix by adding - branch line algorithm and admittance matrix algorithm, to analyze the effect of them, and to provide the models.
本文简要地介绍了不定导纳矩阵的基本概念，讨论了应用于高频小信号放大器的分析方法，给出了应用实例，并得出放大器的增益和输入阻抗表达式。
In this paper the concept of IAM is introduced and the method Used for analyzing H. F. small signal amplifier is discussed. The expressions of gain and input impedance of amplifier are given.
边界节点间的互联支路的阻抗也可以利用边界节点间的导纳矩阵求得。
The resistance of Internet branch of boundary nodes can also be calculated by the admittance of the above.
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