| Abstract: | This paper proposes a new multirate analysis method which selects a proper numerical integration step size for each variable in analyzing a circuit which has subcircuits with different rates. First a formulation technique of multirate circuit equations is derived. Then a rate classification technique is derived from the error estimation formula of the backward differentiation formula (BDF). Further a step‐size adjustment technique at a breakpoint is explained. Finally the proposed method is applied to a basic filter and a dc–dc converter circuit shows the efficiency of the method. © 1999 Scripta Technica, Electr Eng Jpn, 126(4): 55–62, 1999 |
