Patent ID: 7532994

Claim:
A test apparatus which tests whether or not an electronic device performs expected operations, by providing test signals to said electronic device and comparing a plurality of output signals output from said electronic device corresponding to said test signals with respective anticipated values, said test apparatus comprising: reference timing detecting means for detecting that one of said output signals has changed; setting means for setting beforehand a minimum time from changing of said output signal to changing of another output signal; acquisition means for acquiring the value of the latter output signal at a timing at which said minimum time has elapsed from detection of change of said former output signal by said reference timing detecting means; and determination means for determining said electronic device to be defective in the event that the value of the latter output signal acquired by said acquisition means does not match the value which said latter output signal should assume following elapsing of said minimum time, wherein the acquisition means comprises: strobe generating means for generating a strobe signal at a timing at which said minimum time has elapsed from detection of change of said former output signal by said reference timing detecting means; and a comparator for acquiring said latter output signal according to said strobe signal.