I/O buffer with wide range voltage translator
US7005913B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2004 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Mar 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/018521
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In accordance with an aspect of an input/output device for providing fast translation between differential signals from a core of an integrated circuit and higher voltage signals that are external to the core, an I/O buffer includes low voltage devices for receiving core input signals, a cascode stage for setting a bias between the input devices and an output stage, and an output stage including a current mirror for providing a translated external output. Another aspect of the invention further includes a feedback path to cut off the current mirror to prevent static current and a keeper device to maintain an output level after cut off of the current mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.