Output buffer having a pre-driver transition controller
US6459325B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2001 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Apr 11, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6872
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output buffer (100) has a pre-driver circuit (120) for controlling a voltage transition of an output signal from an output driver transistor (150). The pre-driver circuit (120) provides an input that slightly leads the gate voltage of the output driver transistor (150). The pre-driver circuit (120) includes a configurable resistance circuit (480) that provides one resistance value at the start of a signal transition and provides another resistance value near the end of the signal transition. A threshold detector (470) senses a voltage level of the input signal and switches from one resistance value to the other resistance value when the input signal crosses a predetermined voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.