Method and apparatus for dual purpose twisted pair interface circuit for multiple speed media in a network
US5715287A · kind A · utility
16Cited by
3References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1995 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Oct 18, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided allowing a dual-speed network adapter to connect to the same physical connector without the use of mechanical or electro-mechanical switches. On the transmit path, the invention uses a differential amplifier buffer (130) to selectively couple a high speed transmit paths to the network, with the differential amplifier connected to the same output impedance as one of the two driver circuits. On the receive path, the invention allows data to be received in parallel by two receiver circuits, with one circuit isolated from the other with a pair of very high input impedance emitter/followers (40, 50).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.