Shorter compact expansion card to replace an Extended Industry Standard Architecture (EISA) card
US5793617A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Jul 8, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A compact expansion card to replace an Extended Industry Standard Architecture (EISA) card. An EISA card has an edge connector of 188 pins of a given width and a given gap between pins, in 5.5 inches, two rows on a front of the EISA card and two rows on a back of the EISA card. The 188 pins include 157 signal pins, 10 pins dedicated to a +5 volt supply, and 18 pins dedicated to ground. The compact expansion card has an edge connector of 162 pins in 4.5 inches in two rows, one row of 81 pins on a front of the compact card and one row of 81 pins on a back of the compact card, a gap between each of the 162 pins being the same as the given gap between pins of the EISA card. The 162 pins include 157 signal pins, one +5 volt pin dedicated to a +5 volt supply, and one ground pin dedicated to ground. The 157 signal pins are of the same given width as the 157 signal pins of the EISA card. The +5 volt pin is a ten times multiple in width of a signal pin to carry electrical currents that are higher than currents through a signal pin. The one ground pin is an eighteen times multiple in width of a signal pin to carry electrical currents that are higher than currents through a signal pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.