Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1997-11-26
2000-02-15
Karlsen, Ernest
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 731, G01R 3100, G01R 3128
Patent
active
060257083
ABSTRACT:
The present invention is generally directed to a system and method for testing component tolerances of a device for testing integrated circuits, the device having a plurality of test connectors disposed at a test head, each test connector having electrical conductors carrying electrical signals for a test channel, wherein each test channel corresponds to a circuit board that includes at least one driver and one receiver. In accordance with the broad concepts and teachings of the invention, an apparatus and method operate to compare driver and receiver components by interconnecting drivers from a first board to receivers of a second board, and vice-versa. In accordance with one aspect of the present invention, a method is provided for diagnosing component variances in a testing device, wherein the testing device preferably has a plurality of test connectors disposed at a test head, each test connector having electrical conductors carrying electrical signals for a test channel, wherein each test channel corresponds to a circuit board that includes at least one driver and one receiver. The method includes the step of establishing an electrical connection between electrical conductors of a first and second test connector such that a first driver from a first circuit board is electrically connected across a low impedance path to a first receiver or PMU on a second circuit. The method then controls the output of the first driver to drive an electrical signal to a predetermined value, and evaluates the signal level received at the PMU on the second circuit board. Finally, the method controls the output of the first driver to drive an electrical signal to a predetermined value across a low impedance path to the first receiver and verifies that, considering predetermined error of the first driver, the voltage level interpreted by the first receiver is within published ATE specifications. If so, then the system recognizes the tested components as being within specified tolerances. It not, the system flags the error and may take further appropriate, corrective action. Such corrective action may comprise initiating further testing or notifying (via email or otherwise) relevant test personnel to conduct further manual testing.
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Hewlett -Packard Company
Karlsen Ernest
LandOfFree
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