线性电路参数化宏模型自动化建模方法研究

摘要

A method for automatically generating parametric macro-model of linear circuit is proposed.The traditional parametric macro-model is created by barycentric interpolation of several univariate macro -models for different values of the design variables.But the values of the design variables of univariate macro -models are need to be determined artificially.It will result in low efficiency of modeling.To solve the problem, the values of the design variables of univariate macro -models are iteratively selected by gradually narrow the interpolation step with binary dividing algorithm until the model precision is satisfied with the predefined tolerance .An illustrative example involving a low-pass filter is presented for validation of the method proposed .%提出一种线性电路参数化宏模型自动化建模方法。传统的参数化宏建模采用重心插值实现，将非参数化极点－留数宏模型拓展成参数化宏模型；但是需要人工凭经验确定插值节点，效率低下，建模代价大。针对这一问题，通过引入插值步长迭代平分缩小的策略，在满足一定建模精度的情况下，实现自动确定参数化宏模型插值节点，提高了建模效率。最后，通过微带低通滤波器实例验证了所提方法的有效性。