Calibration method for system performance validation of automatic test equipment
US6804620B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2003 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Mar 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31922
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ATE calibration method and system that does not require external test equipment to calibrate individual functional pins and provides balanced timing skews among the functional pins and pincards is disclosed. A functional pin in the test system is selected as a reference or “golden” pin and another is selected as a precision measurement unit (PMU). External test equipment and the reference PMU are used to measure the AC and DC characteristics of the reference pin, and any deviation represents a measurement error in the reference PMU. All functional pins in the test system can be measured against the reference pin using the reference PMU, taking into account the measurement error, without the need for external test equipment. To ensure that skews are balanced among all pins, the location of the reference pin is selected to be as close as possible to the midpoint of the functional pin range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.