Patent ID: 6272663
Filing Date: 2001-08-07
Classification: G06F

Abstract:
A system for reducing undesired radiation generated from an LSI, said system comprising:first storage means for storing a circuit connection information for said LSI and a current waveform of an undesired radiation source of said LSI;transfer function calculating means for calculating a transfer function of undesired radiation, which is transmitted from an undesired radiation source in said LSI to a power source terminal connected to the outside of said LSI, on the basis of said circuit connection information and said current waveform;second storage means for storing a constraint on an impedance added in the vicinity of said undesired radiation source, and an allowable level of undesired radiation at said power source terminal; andundesired radiation optimizing means for calculating an impedance, which causes said undesired radiation at said power source terminal to be less than or equal to said allowable level, using said transfer function under said constraint.