Patent ID: 7107815

Claim:
A method for calibrating a semiconductor test instrument for performing timing calibration of a semiconductor test instrument having drivers for generating signals synchronizing with clock signals and comparators for performing comparisons synchronizing with strobe signals, comprising: a first step of adjusting phases of said strobe signals corresponding to an in-group common comparator by using one of said comparators included in each group as the in-group common comparator on the basis of said clock signals corresponding to a common driver by using one of said drivers as the common driver while said drivers and said comparators are divided into m number of groups so that two or more of said drivers or said comparators are included; a second step of adjusting phases of said clock signals on the basis of said strobe signals corresponding to said in-group common comparator in each of said m number of groups; and a third step of adjusting phases of said strobe signals corresponding to said comparators included in the same group on the basis of said clock signals corresponding to any one of said drivers in each of said m number of groups.