Patent ID: 9702929
Date: 2017-07-11
CPC Classifications: G01R,G11C

Claim:
1. A test apparatus configured to test a device under test, the test apparatus comprising: a judgment unit configured to judge a pass/fail of the device under test; a power supply circuit configured to allow a characteristic thereof to be changed, and to supply a power supply signal to the device under test; and a condition setting unit configured to perform a pilot test before a main test for the device under test, and to determine a value of the power supply signal to be supplied to the device under test in the main test, wherein the condition setting unit is configured to execute: (a) measuring a first device characteristic value for each of a plurality of pilot sample devices sampled from the devices under test in a state in which a characteristic of the power supply circuit is emulated such that the characteristic of the power supply circuit is close to a power supply characteristic in a user environment in which the device under test is actually used; (b) measuring a second device characteristic value for each of the plurality of pilot sample devices in a state in which a characteristic of the power supply circuit is emulated such that the characteristic of the power supply circuit is close to that of a tester environment in which the main test is performed; and (c) determining the value of the power supply signal used in the main test based on the first device characteristic value and the second device characteristic value, wherein the second device characteristic value represents a lower limit value of the power supply signal that allows the device under test to operate normally when the device under test is operated at a rated frequency.