Integrated logic circuit with protector transistor
US4967103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Jan 10, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00315
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to an additional transistor which is connected in cascode with a sub-circuit of a logic circuit in order to protect further transistors of the sub-circuit against hot carrier stress and hot carrier degradation. In a logic circuit having transistors of a first conductivity type, an additional transistor of the second conductivity type is arranged in cascode. This additional transistor is connected as a diode or as a current source in dependence on an output voltage of the circuit. Further aspects of the invention concern the switching means for switching the additional transistor and the location where the additional transistor is to be inserted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.