Method and apparatus for analog compensation of driver output signal slew rate against device impedance variation
US7363595B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | May 28, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/367
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for analog compensation of driver output signal slew rate against device impedance variation. The method includes a signal termination device coupled to a driver output pad. In one embodiment, driver includes a pull-up circuit having at least one pull-up device and a pull-down circuit including at least one pull-down device. In one embodiment, the pull-up circuit and the pull-down circuit including corresponding pull-up and pull-down compensation resistive elements. Accordingly, the pull-up and pull-down compensation resistive elements provide analog compensation of a driver output signal slew rate against device impedance variation. In one embodiment, a slew rate of the driver output signal is within a predetermined slew rate range to avoid uncontrolled fast switching as well as unnecessarily slow switching in the driver output signal. Other embodiments are described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.