Dual 10BASE-T and 100BASE-TX transmission termination circuit
US5838723A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0266
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transmission termination circuit able to reduce transmission signal reflections and resultant data corruption such that a single network may selectively communicate data using either a voltage driven transceiver or a current driven transceiver. A 10BASE-T transceiver has differential voltage driven outputs. A first output is coupled to a first terminal of a primary winding of a transformer through a first resistor. A second output is coupled to a second terminal of the first primary winding through a second resistor. A 100BASE-TX transceiver has differential current driven outputs. A first output is coupled to a first terminal of a second primary winding of the transformer. A second output is coupled to a second terminal of the second primary winding. A resistive snubber comprising a resistor in series with a capacitor is coupled across the 100BASE-TX outputs. A twisted-pair network is coupled to a secondary winding of the transformer. When transmitting in 10BASE-T format, the resistive snubber suppresses voltage transients caused by a leakage inductance in series with the reflected 10BASE-T circuit. The snubber has a time constant which is large enough suppress transients during…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.