JITTER AMOUNT ESTIMATING METHOD, METHOD FOR CALCULATING CORRELATION BETWEEN AMOUNT OF SIMULTANEOUSLY OPERATING SIGNAL NOISE AND JITTER AMOUNT, AND RECORDING MEDIUM

摘要

An SSO noise calculating unit estimates the amount of simultaneously operating signal noise caused by simultaneous operations of input/output pins peripheral to a power supply voltage pin as a center. A PLL jitter calculating unit estimates the amount of jitter occurring at the power supply voltage pin by using as an input the estimated amount of simultaneously operating signal noise, and by referencing a correlation between the amount of simultaneously operating signal noise and the amount of jitter, which indicates a correlation calculated beforehand between the amount of simultaneously operating signal noise and the amount of jitter.