Circuit and method for automatic input-output configuration through local area network detection
US5121482A · kind A · utility
45Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1989 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Sep 11, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/28
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invented circuit includes an I/O driver capable of supplying current to an I/O connector, a current detection circuit that may include a current limit resistor and a differential amplifier, a comparator to compare the level of current to a predetermined level and to produce an output signal based thereon, and a translator to convert the output signal from the comparator into a transistor-transistor logic signal. The device that includes the invented circuit then interprets the logic signal as identifying either a serial I/O system or a LAN I/O system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.