Universal power transistor base drive control unit
A saturation condition regulator system for a power transistor is disclosed which achieves the regulation objectives of a Baker clamp but without dumping excess base drive current into the transistor output circuit. The base drive current of the transistor is sensed and used through an active feedback circuit to produce an error signal which modulates the base drive current through a linearly operating FET. The collector base voltage of the power transistor is independently monitored to develop a second error signal which is also used to regulate base drive current. The current-sensitive circuit operates as a limiter. In addition, a fail-safe timing circuit is disclosed which automatically resets to a turn OFF condition in the event the transistor does not turn ON within a predetermined time after the input signal transition. 2 figs.
- Research Organization:
- Eaton Corp
- DOE Contract Number:
- AC07-84NV10366
- Assignee:
- Eaton Corp., Cleveland, OH (United States)
- Patent Number(s):
- US 4749876; A
- Application Number:
- PPN: US 6-944981
- OSTI ID:
- 7266772
- Resource Relation:
- Patent File Date: 22 Dec 1986
- Country of Publication:
- United States
- Language:
- English
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