Steady-state time-domain analysis method with variable time step integration

A method for steady-state time-domain analysis with variable time step integration is presented. The algorithm proposed is based on using the changes of the sources as initial data of the analysis and subsequently using the truncation error with optimization. An example is given to demonstrate that the novel method is efficient and sufficiently fast to be used in circuit design. The simulation results show good agreement with those obtained by harmonic balance, steady-state time-domain with a fixed time step integration, and transient analysis.