xDSL multistandard driver circuit
US7649948B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2005 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Apr 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45475
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An electric circuit for amplifying an xDSL signal comprises an operational amplifier and a signal monitoring circuit. The operational amplifier is configured to amplify the xDSL signal, is powered by a variable voltage supply and has a gain which is adjustable by an operating mode control signal. The signal monitoring circuit is activated by the operating mode control signal and is configured, when activated by the operating mode control signal, to generate a control signal to adjust the voltage of the variable voltage supply in order to adjust the maximal signal swing of the output signal of said operational amplifier. The control signal is generated by comparing the amplitude of the xDSL signal applied to the electric circuit with an amplitude threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.