Pseudodynamic off-chip driver calibration
US7304495B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2004 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Jan 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A driver system, a driver calibration circuit arrangement for calibration of an impedance of a driver circuit arrangement, and a method for calibration of an impedance of a driver circuit arrangement can achieve improved driver behavior, with respect to undesirable distortions of the slew rate caused by off-chip drivers of DDR memory modules. A driver system has a first driver part with at least one variable impedance by which an operating point of the first driver part is determined with respect to a first potential and a second potential. The potentials supply the first driver part. A first monitoring device adjusts an impedance value of the variable impedance such that the operating point differs from a mid-point of the first and of the second potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.