Proportional base drive circuit

Details Proportional base drive circuit Proportional base drive circuit

1991-02-27

1992-08-11

LaRoche, Eugene R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307300, H03K 1708

Patent

active

051382024

ABSTRACT:
A proportional base drive circuit for a power transistor. A first MOSFET, when enabled by an ON pulse, initially supplies the base drive current from a power supply to the base of the power transistor. The resulting current flow through the transistor to a load causes a proportional current to be induced in a current transformer. The induced current is supplied to the base of the power transistor through the first MOSFET. When an OFF pulse is applied, the first MOSFET is disabled and supplies no current to the base of the transistor. At the same time a second MOSFET causes the base-emitter junction of the power transistor to be negatively biased, thereby quickly switching the power transistor off.

REFERENCES:
patent: 3194979 (1965-07-01), Toy
patent: 3636372 (1972-01-01), Hujita et al.
patent: 3657572 (1972-04-01), Millman
patent: 4356416 (1982-10-01), Weischedel
patent: 4491744 (1985-01-01), Corey
patent: 4588904 (1986-05-01), Giogolja
patent: 4604535 (1986-08-01), Sasayama et al.
patent: 4677324 (1987-06-01), Ronan, Jr. et al.
patent: 4970620 (1990-11-01), Lehnhoff et al.

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