Patent ID: 7111490
Filing Date: 2006-09-26
Classification: G01R

Abstract:
1. A method for calibrating 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 clock signals corresponding to an in-group common driver by using one of said drivers included in each group as the in-group common driver on the basis of said strobe signals corresponding to a common comparator by using one of said comparators as the common comparator 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 strobe signals corresponding to said comparator included in the same group on the basis of said clock signals corresponding to said in-group common driver in each of said m number of groups; and a third step of adjusting phases of said clock signals corresponding to said drivers included in the same group on the basis of said strobe signals corresponding to any one of said comparators in each of said m number of groups.