Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1992-12-17
1995-09-26
Stephan, Steven L.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
327432, 327427, 327379, H03K 500
Patent
active
054539056
ABSTRACT:
A circuit for increasing the reverse breakdown voltage of a bipolar transistor that provides drive current to an inductor has a voltage control transistor connected between the collector and base of the bipolar transistor, having a control element connected to one end of the inductor. The circuit can be fabricated as a portion of an integrated circuit formed on a single semiconductor substrate. Also disclosed is a method for increasing the emitter-collector breakdown voltage of a bipolar transistor in which the base and collector of the bipolar transistor are shorted when the emitter-collector voltage exceeds the breakdown voltage by turning on a transistor connected between the base and collector of the bipolar transistor.
REFERENCES:
patent: 4705322 (1987-11-01), Yiannoulos
patent: 4706159 (1987-11-01), Hafner
patent: 4968953 (1990-11-01), Kanda et al.
patent: 5075568 (1991-12-01), Bilotti et al.
The Transistor and Diode Data Book, 1973, 4-94, 4-95, Texas Instrument Incorporated.
Bachand Richard A.
Jorgenson Lisa K.
Krishnan Aditya
Robinson Richard K.
SGS-Thomson Microelectronics Inc.
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