| 摘要 |
PROBLEM TO BE SOLVED: To provide an analyzing method capable of analyzing a power supply current of a semiconductor integrated circuit including a digital circuit, with high accuracy and at high speed. SOLUTION: In the method for analyzing the power supply current waveform in consideration of charge re-distribution process inside the digital circuit in the semiconductor integrated circuit, an analyzed digital circuit is expressed as a column of parasitic capacitancesΣCch,↑(nT),ΣCch,↓(nT) connected/charged between the power supply and a ground, which are obtained on the time series on the basis of a switching operation distributin of the logical gate circuit included in the digital circuit, and the column of parasitic capacitances is further connected with each parasitic impedance component Zd, Zg of a power supply route and a ground route and thus an analytic model is created, and by using the circuit model, the power supply current waveform of the digital circuit is obtained.
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