Output buffer with regulated voltage biasing for driving voltages greater than transistor tolerance
US5966030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1997 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Aug 5, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00315
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output driver circuit includes first and second supply terminals, first and second complementary data terminals and an output terminal. A pull-up transistor is coupled between the first supply terminal and the output terminal and has a first control terminal. A pull-down transistor is coupled between the second supply terminal and the output terminal and has a second control terminal which is coupled to the second data terminal. A voltage level shifting circuit is coupled between the first complementary data terminal and the first control terminal and is biased between the first supply terminal and a voltage-controlled node. A voltage regulator is coupled to the voltage-controlled node for regulating the node at a selected voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.