High efficiency, current sink only line driver
US6538510B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Oct 1, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/085
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An improved line driver and method for increasing the available signal transmit power on a transmission line are disclosed. The improved line driver achieves an available transmit power increase by limiting the output stage signal path to NMOS and NPN bipolar semiconductor devices. The output stage of the improved line driver may comprise a first amplifier, a second amplifier, a first transformer, a second transformer, and a plurality of back-matching resistor networks. A second embodiment of an improved output stage of a line driver may comprise a first amplifier, a second amplifier, a transformer, and a plurality of back-matching resistor networks. Both preferred embodiments may be implemented with CMOS and bipolar semiconductor devices, as well as, a combination of the two semiconductor technologies. In its broadest terms, the method for increasing the available signal transmit power on a transmission line can be described as: applying a transmit signal to an input stage of an integrated line driver; amplifying the transmit signal in the output stage of a line driver using amplifier components selected from the group consisting of NMOS and NPN bipolar semiconductor devices in th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.