Protection device against the breakdown of bipolar transistors i

Details Protection device against the breakdown of bipolar transistors i Protection device against the breakdown of bipolar transistors i

1990-04-19

1992-05-12

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

307567, 307253, 323289, H02H 324

Patent

active

051133059

ABSTRACT:
The protection device ocmprises automatic commutating means interposed between the base of a transistor to be protected and the collector of a power device to cause a flow of current having a low voltage drop between the base and the collector when the collector voltage falls below a predetermined value.

REFERENCES:
patent: 4748350 (1988-05-01), Emori
patent: 4825102 (1989-04-01), Iwasawa et al.
patent: 4928053 (1990-05-01), Sicard
patent: 4956565 (1990-09-01), Bahlmann
European Search Report EP 90200933.1 Place: Vienna Completed 17-Aug.-1990.

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