Automatic verification of adequate conductive return-current paths
US7882469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2007 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Mar 30, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/398
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
After finding the shortest conductive signal return-current path for each signal, the invention assesses whether each conductive return-current path is adequate. The method analyzes each shortest conductive signal return-current path and determines if a significant portion of the signal return current flows as displacement current rather than following the conductive current path. A significant displacement current flows when the length of the conductive return-current path that diverges from a signal net is more than a previously defined limit based on the signal transition time. Further, a significant displacement current flows when the overall length of the signal differs from the overall length of the conductive return-current path by more than a previously defined limit based on the signal transition time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.