A novel algorithm that finds multiple operating points of nonlinear circuits automatically

The use of continuation methods has been shown to be more effective than standard Newton-Raphson-based methods in finding the operating point(s) of circuits with convergence problems. In this paper a new algorithm that searches for multiple operating points automatically, with no user intervention required, is shown to be a direct extension of the use of a particular continuation method. This algorithm, which exploits the asymmetrical properties of nonlinear mappings that describe multistable circuits, has been implemented into a program which automatically finds multiple (in most cases, all) operating points of a circuit. A number of challenging examples are given