| 摘要 |
A delay calculation method that is capable of calculating delay time with a small margin of error is provided for delay calculation in a logic circuit. The operating characteristics of transistor are expressed with a fixed resistance and a power supply voltage that changes with time. The power supply voltage is represented as a waveform which is a combination of two straight lines: the one indicating that the voltage, after a fixed delay of t0, increases to V1 during Deltat1; and the one indicating that the voltage increases from V1 to E during Deltat2 and thereafter remains at the fixed value of E. A difference in the shapes of input waveforms is adopted as a correction parameter to determine the values of Deltat1, V1, and Deltat2.
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