Driving stage for driving differential amplifiers of a subscriber line interface circuit
US5901221A · kind A · utility
2Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | May 7, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a driving stage for driving the two differential amplifier output stages of a subscriber line interface circuit, the driving stage is adapted to generate four driving currents in dependence on, on the one hand, transversal and longitudinal signals incoming to the driving stage and, on the other hand, a reference current, and to supply these driving currents in pairs to the two inputs of the differential amplifier output stages, all four of the driving currents being larger than zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.