Darlington amplifier with high speed turnoff
US4885486A · kind A · utility
28Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/0406
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Darlington-type amplifier (10) having an input field effect transistor and an output bipolar transistor (T.sub.2) is disclosed with improved turn-off time. Turnoff is enhanced by short-circuiting the gate-to-source or drain capacitance of the input field effect transistor (T.sub.1) and after turnoff is complete of the input field effect transistor prior to turn off of the output bipolar transistor (T.sub.2) coupling the base of the output bipolar transistor to a reference potential to discharge minority carriers therein to complete turnoff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.