Simple output buffer drive strength calibration
US6549036B1 · kind B1 · utility
45Cited by
18References
88Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 31, 2000 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/018585
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output buffer driver calibration circuit and method are disclosed. Pull-up and pull-down devices of the output buffer driver circuit are simultaneously driven and the resulting output voltage is compared to a predetermined reference voltage, and a control signal is generated which is used to adjust the strength of one of the pull-up and pull-down devices so that the drive strength of the two devices approaches equality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.