Adjustable output driver circuit
US5917758A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/164
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An adjustable integrated circuit output driver circuit is described which has a push-pull output circuit comprised of a pullup and pulldown transistor. A series of parallel transistors are connected to both the pullup and pulldown transistors. The gates of the parallel transistors are selectively controlled to adjust the driver current connected to a data bus line. Adjustable slew rate control circuits are described which are coupled to the pullup and pulldown transistors. Slew rate control circuitry and output control circuitry is provided to selectively adjust the driver circuit either during manufacture or after installation on a data bus. An alternate open-drain adjustable output driver circuit is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.