Transistors power stages

Details Transistors power stages Transistors power stages

1978-02-22

1980-11-11

Moffitt, James W.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Magnetic trigger devices

307314, 307315, H03K 1780

Patent

active

042335299

ABSTRACT:
In circuitry comprising a switching power output transistor stage and a driver transistor circuit, energy is stored in a magnetic circuit during the transistor on time to provide the turn off current. First and second magnetically coupled inductors are connected in series on the output of the driver transistor, and the base of the power transistor is connected to the junction point of the two series inductors. One or more diodes are connected in parallel with the first inductor to limit the potential drop across this inductor at turn on, and a parallel combination of at least one diode and a resistor is connected in series with the second inductor. The output stage may be two power transistors connected in a Darlington type configuration with a similar inductive circuit provided for each transistor.

REFERENCES:
patent: 3666971 (1972-05-01), Bixby et al.

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