Methods and systems to calibrate push-pull drivers
US8253440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2009 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Sep 23, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/2254
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems to calibrate an on-die resistor relative to an operating voltage of an on-die push-pull driver, and to calibrate the push-pull driver relative to the on-die resistor and relative to operating voltages of the push-pull driver. The calibrated on-die resistor may be used to calibrate receive terminations, a differential transmit termination, and a simulated far-end differential receive termination. The calibrated differential transmit termination and simulated far-end differential receive termination may be coupled in parallel to calibrate current drivers. Calibration of the current drivers may include calibrating voltage swing, and may include a first phase that simultaneously adjusts compensation to the current drivers, and a second phase that individually adjusts the compensation to the current drivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.