Computing Symbolic Expressions in Analog Circuits Using Nullors

A NOVEL METHOD IS INTRODUCED TO COMPUTE SYMBOLIC EXPRESSIONS IN ANALOG CIRCUITS MODELED BY NULLORS. THE PROPOSED METHOD IS BASED ON THE FORMULATION OF A COMPACT SYSTEM OF EQUATIONS (CSES) BY MANIPULATION OF DATA-STRUCTURES, WHICH HIGHLY IMPROVES TRADITIONAL SYMBOLIC-METHODS. IT IS DEMONSTRATED THAT BY MODELING ALL ACTIVE DEVICES USING NULLORS, THE CSES IS EASILY FORMULATED BY MANIPULATION OF BOTH THE NULLOR AND ADMITTANCE INTERCONNECTION-RELATIONSHIPS. SEVERAL EXAMPLES LEADS US TO CONCLUDE ON THE SUITABILITY OF THE PROPOSED SYMBOLIC-METHOD TO BE INCOR-PORATED WITHIN A SYMBOLIC SIMULATOR.

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