Inexact Newton methods for the steady state analysis of nonlinear circuits

In this paper numerical problems arising from steady state analysis of nonlinear circuits with quasiperiodic excitation are discussed. The approach we consider is based on the piecewise harmonic balance technique(8,9) (HB), a methodology which has its theoretical foundations in Galerkin's procedure (see the paper by Urabe(1,2)). The original problem, which can be expressed in the form of a system of integrodifferential equations in the time domain, is changed into a nonlinear algebraic system through a natural projection technique. Thus, one of the main issues we have investigated consists in the numerical solution of the specific nonlinear algebraic problem.