Method for control of ground bounce above an internal ground plane in a short-wire board test fixture
US5389874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Mar 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/07378
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An algorithm selects probe locations for both test signal probes and ground probes in a short-wire board test fixture. The board test fixture connects a test system to a circuit board under test. The algorithm minimizes ground bounce. The algorithm envisions first superimposing an imaginary grid of squares over the circuit board. Then, ground probe locations are derived so that no more than five test signal probes for each ground probe reside within each of the imaginary squares and so that each critical test signal probe is associated within a preselected distance of a ground probe. In the preferred embodiment, the imaginary square measure 1.4 inches on a side, and the preselected distance is approximately one inch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.