Adaptive transistor drive circuit
US4755741A · kind A · utility
21Cited by
4References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Nov 18, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/0422
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An adaptive transistor drive circuit including a multiple-emitter transistor, at least one emitter of which is connected to the drive circuit. When the drive current causes the transistor to saturate, the emitter connected to the drive circuit conducts a portion of the drive current to limit saturation of the transistor. A current source provides drive current which varies as a function of the current conducted by the collector of the transistor so as to maintain the transistor in saturation as the collector current and operating temperature vary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.