Patent ID: 6230294
Filing Date: 2001-05-08
Classification: G06F

Abstract:
A transient analysis device for conducting transient analysis processing of an analog/digital mixed circuit, comprising:circuit diagram producing means for producing a first circuit diagram of an analog/digital mixed circuit to be analyzed;net list producing means for converting a transfer function of said analog/digital mixed circuit corresponding to the first circuit diagram produced by said circuit diagram producing means into a first net list;simulation executing means for executing measurement of a settling time corresponding to an output signal of an analog circuit unit in said analog/digital mixed circuit and transient analysis processing, said simulation executing means measuring a settling time of said analog/digital mixed circuit by using the first net list produced by said net list producing means; anddummy pulse parameter setting means for setting a parameter of a dummy pulse based on the result of measurement of the settling time by said simulation executing means, whereinafter said dummy pulse parameter setting means sets a parameter of a dummy pulse based on the measurement result, said circuit diagram producing means produces a second circuit diagram of a new second circuit obtained as a result of the addition of a dummy pulse generation circuit for generating a dummy pulse whose parameter has been set to said analog/digital mixed circuit, said net list producing means converts a transfer finction of the new second circuit into a second net list, and said simulation executing means executes transient analysis processing by using the second net list produced with respect to said new second circuit; andsaid simulation executing means jointly employs, as settling points, an analysis point set according to a time step analysis method and a measurement point set based on the timing of a rise and a fall of said dummy pulse to execute transient analysis.