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Hierarchical Symbolic Analysis of Analog Circuits Using Two-Port Networks

This paper presents a method towards hierarchical symbolic analysis of linear analog circuits using two- port networks. The important difference to the ordinary flat symbolic ana lysis is, that we treat the transistor pairs as blocks and then derive the transfer function with network analyzer without to setup and solve a complicated DAE system for a whole analog circuit. The hierarchical idea can be even used to large circuits in divide and conquer manner. Experimental results obtained with some applications of this method are presented.