Compensation for voltage drop in automatic test equipment
First Claim
1. Test equipment for a device under test (DUT), comprising:
- an adapter board configured to connect to multiple connection terminals of the DUT via a removably attachable socket which holds the DUT;
a tester which sends and receives test signals to the DUT through the adapter board and which supplies power to the DUT through the adapter board;
wherein an internal power bus of the DUT comprises a Vdd component and a Vss component, wherein one of at least two power connection terminals of the DUT connects to the Vdd component and another of the at least two power connection terminals connect to the Vss component, and wherein one of another at least two power connection terminals of the DUT connects to the Vss component and another of the another at least two power connection terminals connect to the Vdd component;
wherein, the adapter board supplies power from the tester to the DUT through the at least two power connection terminals of the DUT and monitors voltage at the another at least two power connection terminals of the DUT; and
wherein, the tester includes a compensation unit which controls the power supplied to the DUT based on the voltage monitored at the another at least two power connection terminals.
2 Assignments
0 Petitions
Accused Products
Abstract
Providing reliable testing of a device under test (DUT) by compensating for a reduced voltage inside the device without changing the internal circuitry of the device. The DUT has multiple connection terminals for connecting to the test equipment including at least first and second power connection terminals that both connect to an internal power bus of the DUT. An adapter board connects to the multiple connection terminals of the DUT via a removably attachable socket which holds the DUT. A tester supplies power to the DUT through the adapter board. The adapter board is configured to supply power from the tester to the DUT through the first power connection terminal and to monitor voltage at the second power connection terminal. The tester includes a compensation unit which controls power based on the voltage monitored at the second power connection terminal.
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Citations
14 Claims
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1. Test equipment for a device under test (DUT), comprising:
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an adapter board configured to connect to multiple connection terminals of the DUT via a removably attachable socket which holds the DUT; a tester which sends and receives test signals to the DUT through the adapter board and which supplies power to the DUT through the adapter board; wherein an internal power bus of the DUT comprises a Vdd component and a Vss component, wherein one of at least two power connection terminals of the DUT connects to the Vdd component and another of the at least two power connection terminals connect to the Vss component, and wherein one of another at least two power connection terminals of the DUT connects to the Vss component and another of the another at least two power connection terminals connect to the Vdd component; wherein, the adapter board supplies power from the tester to the DUT through the at least two power connection terminals of the DUT and monitors voltage at the another at least two power connection terminals of the DUT; and wherein, the tester includes a compensation unit which controls the power supplied to the DUT based on the voltage monitored at the another at least two power connection terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for testing an electronic device under test (DUT), wherein the DUT has multiple connection terminals for connecting to a test equipment, the multiple connection terminals including power connection terminals that connect to an internal power bus of the DUT, wherein the internal power bus comprises a Vdd component and a Vss component, the test equipment comprising an adapter board and a tester that includes a compensation unit, the method comprising:
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supplying power to first and second power connection terminals of the internal bus of the DUT using the test equipment, the first power connection terminal connected to the Vdd component, and the second connection terminal connected to the Vss component; monitoring a voltage level at third and fourth power connection terminals of the internal power bus, the third power connection terminal connected to the Vdd component, and the fourth connection terminal connected to the Vss component; controlling power supplied to the first and second power connection terminals based on the voltage level monitored at the third and fourth power connection terminals; wherein, the adapter board supplies power from the tester to the DUT through the first and second power connection terminals and monitors voltage at the third and fourth power connection terminals; and wherein, the compensation unit controls power based on the voltage monitored at the third and fourth power connection terminals. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification