Reduced line driver output dependency on process, voltage, and temperature variations
US7944251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2009 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Mar 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45688
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
According to one exemplary embodiment, a transmitter module includes a line drive including a current digital-to-analog converter, where the line driver provides an analog output waveform. The current digital-to-analog converter receives a digitally filtered input waveform including at least two voltage steps. The at least two voltage steps of the digitally filtered input waveform cause a rise time of the analog output waveform to have a reduced dependency on process, voltage, and temperature variations in the line driver, while meeting stringent rise time requirements. The digitally filtered input waveform has an initial voltage level and a final voltage level, where the final voltage level is substantially equal to a sum of the at least two voltage steps of the digitally filtered input waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.