I/O driver for integrated circuit with output impedance control
US7443194B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2008 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Apr 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An I/O driver has v/i characteristic control for maintaining a substantially flat output impedance response using a transmission gate configuration at an I/O output pad. The configuration includes a linear resistive element electrically connected at an I/O pad for limiting a processed data I/O signal, an active impedance element for receiving and processing the data signal, which comprises data represented by a series of voltage state transitions, and pull-up and pull-down array calibration words, for generating and outputting a processed I/O output signal to the resistive element to output a substantially flat v/i response at switching of the data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.