Variable slew rate control for open drain bus
US6710617B2 · kind B2 · utility
29Cited by
6References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2002 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jan 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/164
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and circuit for controlling the slope of a transitioning signal on a transmission line of integrated circuit is achieved using stepwise pull-down impedance reduction/augmentation. Over a series of sequentially ordered steps, a predetermined decreasing (or increasing) impedance is connected between the transmission line and voltage source. Using certain predetermined impedance values in order, a linear slew rate on the output signal is achievable. Adjusting the time delay between each step allows the slope of the linear slew rate to be adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.