Input drive apparatus for power transistor

Details Input drive apparatus for power transistor Input drive apparatus for power transistor

1984-06-26

1986-08-12

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307300, 307570, H03K 326, H03K 1760

Patent

active

046058656

ABSTRACT:
An input drive apparatus of a power transistor is constituted by a transformer having a core with an air gap, a primary winding energized from an input source in accordance with a forward input bias instruction, and a secondary winding, a first transistor electrically insulated from the input source and turned ON by the voltage of the secondary winding for supplying a forward input bias to the power transistor, and a second transistor electrically insulated from the input source and turned ON in accordance with a reverse input bias instruction for supplying electromagnetic energy stored in the transformer to the input electrode of the power transistor to act as a reverse bias current in accordance with a reverse bias instruction. These is also provided diode means for returning to the input source the electromagnetic energy stored after charge carriers accumulated in the power transistor have been extinguished, and the electromagnetic energy stored in the transformer when a forward bias instruction is applied.

REFERENCES:
patent: 4308577 (1981-12-01), Mentler
patent: 4356408 (1982-10-01), Glennon
IBM Tech. Dsclre. Bttn., "Switching Regulator with Transistor Turnoff", by C. J. Palmucci, vol. 16, No. 4, Sep. 1973, p. 1161.

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