Patent ID: 7395480

Claim:
A test apparatus for testing whether or not delay faults have occurred in a signal propagation path included within a test subject device, comprising: a threshold voltage setting unit for setting threshold voltages of a logic device component connected to said signal propagation path; a test signal supply unit for supplying a test signal to said test subject device so as to operate said logic device component provided to said signal propagation path in a state in which said threshold voltages have been set to first threshold voltages, and in a state in which said threshold voltages have been set to second threshold voltages, by said threshold voltage setting unit; a current measurement unit, for measuring a first operating current which is the current consumption of said test subject device in a case in which said logic device component operates in a state in which said first threshold voltages have been set, and for measuring a second operating current which is the current consumption of said test subject device in a case in which said logic device component operates in a state in which said second threshold voltages have been set; and an acceptability determination unit for determining whether or not said signal propagation path is acceptable, based upon said first operating current and said second operating current.