BiCMOS tri-state output buffer
US5153464A · kind A · utility
5Cited by
16References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/09448
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved tri-state output buffer of the type that includes an output stage comprising a pair of bipolar transistors in a totem-pole configuration. A CMOS predriver arrangement includes a circuit configuration for selectively adjusting the resistance between the base and the emitter of the source-follower output transistor. The predriver protects the source-follower from harmful bias effects by selectively adjusting the resistance in the emitter-to-base path of the source-follower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.