Low swing voltage mode driver
US9152257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2012 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Nov 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/017545
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output driver includes control logic configured to switch on a pull-up circuit and a pull-down circuit to provide an output impedance for a logic low on a transmission line. The output driver includes a variable pull-up resistor. The control logic is configured to switch on the pull-up circuit to a first value of impedance to drive a logic high on the transmission line. The control logic is configured to switch on the pull-up circuit to a second value of impedance and to switch on the pull-down circuit to provide the output impedance to drive a logic low on the transmission line. The system could alternatively be configured for the inverse to switch on a combination of pull-up and pull-down circuits for a logic high, where the pull-down circuit is switched on for a logic low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.