Power efficient ADSL central office downstream class G power switch
US7177418B2 · kind B2 · utility
56Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2002 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Jan 14, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided for switching between power supply rail voltages for a differential driver device of a class G amplifier device. The amplifier device employs power MOSFETs to switch between supplying high supply voltages and low supply voltages to the power rails of the differential driver. The class G amplifier can be employed in driving an ADSL signal over a telephone line. A control device ramps the power supply rail voltage between low power supply states and high power supply states to mitigate noise and spikes that can be coupled to the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.