Method and apparatus for output driver calibration, and memory devices and system embodying same
US7557603B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2006 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Nov 15, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/028
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, system, and output driver calibration circuit determine calibration values for configuring adjustable impedance output drivers. The calibration circuit includes a pull-up calibration circuit configured to generate an averaged pull-up count signal for calibrating p-channel devices in the output driver with the averaged pull-up count signal being an average of a plurality of pull-up count signals. The calibration circuit further includes a pull-down calibration circuit configured to generate an averaged pull-down count signal for calibrating n-channel devices in the output driver with the averaged pull-down count signal being an average of a plurality of pull-down count signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.