Means for virtual deskewing of high/intermediate/low DUT data
US5982827A · kind A · utility
6Cited by
16References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | May 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31937
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for accomplishing virtual deskewing of device-under-test data received by a test system by skewing clock signals instead. In a preferred embodiment, the invention includes a receiver circuit which is capable of operating in a window compare mode to capture a transition of a data signal from either a low data state to a high data state or a high data state to a low data state. The receiver circuit receives a high-level comparator signal and a low-level comparator signal, which when properly deskewed, together indicate what state the data signal is in.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.