Patent ID: 8427182
Filing Date: 2013-04-23
Classification: G01R

Abstract:
1. A test apparatus that tests a device under test, comprising: a first capacitor and a second capacitor; a switching section that (i) switches which of the first capacitor and the second capacitor supplies power to the device under test and (ii), when the first capacitor and the second capacitor supply power to the device under test, switches, according to a test voltage for testing the device under test, whether the first capacitor and the second capacitor are used in a parallel connection or in a serial connection; a judging section that judges acceptability of the device under test based on an operational result of the device under test; a power supply section that includes a first power supply unit that charges the first capacitor and a second power supply unit that charges the second capacitor; and a monitoring section that monitors degradation amounts of the first capacitor and the second capacitor, wherein the switching section has states comprising: the power supply section (i) causes the first capacitor to connect to the first power supply unit when the switching section is in the first state, (ii) causes the second capacitor to connect to the second power supply unit when the switching section is in the second state, (iii) causes the first capacitor to connect to the first power supply unit, charges the first capacitor with the first power supply unit, causes the second capacitor to connect to the second power supply unit, and charges the second capacitor with the second power supply unit when the switching section is in the third state, and (iv) causes the first capacitor not to connect to the first power supply unit and causes the second capacitor not to connect to the second power supply unit when the switching section is in the fourth state.