Circuit and method for controlling the slew rate of the output of a driver in a push-pull configuration
US6194935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Nov 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/163
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit and method are disclosed for controlling the slew rate of the output voltage of a driver in a push-pull configuration. The circuit includes a capacitive element and a current generator circuit for generating one or more currents. The circuit further includes a switching circuit for selectively charging and discharging the capacitive element in response to an input signal, wherein the voltage across the capacitive element is a voltage signal whose edge transitions have slopes which are controlled based upon the capacitance of the capacitive element and the current level of the one or more currents. The circuit further includes a conversion circuit for converting the voltage signal into one or more current signals, the one or more current signals being used to control a pull-up device and pull-down device of the driver so that the slopes of the edge transitions of the output voltage thereof is based upon the slopes of the edge transitions of the voltage signal appearing across the capacitive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.