Tri-state output circuit provided with means for protecting against abnormal voltage applied to output terminal
US4717846A · kind A · utility
7Cited by
12References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Sep 25, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00315
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output circuit protected by an abnormal voltage supplied at an output terminal is disclosed. The output circuit comprises a first switching circuit includes first and second transistors connected in series for providing an output terminal with a first potential therethrough in response to a first logic state of a logic signal, a second switching circuit for providing the output terminal with a second potential in response to a second logic state of the logic signal, and means for making the first and second transistors non-conducting when the first switching circuit is disenabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.