Output driver for a 10baset/100basetx ethernet physical layer line interface
US6559692B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1999 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Apr 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0292
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-path unity gain buffer circuit and method are implemented in a slew amplifier. The multi-path unity buffer has a high frequency signal path and a low frequency signal path. The high frequency signal path has a differential amplifier powered for providing a high frequency, low accuracy buffering operation. The low frequency signal path is coupled to the high frequency signal path. The low frequency signal path has an operational amplifier powered to provide a low frequency, high bandwidth buffering operation. An output of the operational amplifier is fed back to an input of the operational amplifier through a current varying element that varies current levels of the input of the operational amplifier to remove a level shift of an output signal of the differential amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.