Circuit for switching current in an inductive load

Details Circuit for switching current in an inductive load Circuit for switching current in an inductive load

1985-03-07

1987-09-22

Dixon, Harold

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge device and/or rectifier in shunt to the load device

315219, 315242, 307566, H05B 3700

Patent

active

046957707

ABSTRACT:
A circuit for switching a current in an inductive load comprising at least one transistor (1) which switches through its collector-emitter path the current in the load (7). The base is coupled to the emitter through a voltage-stabilizing element (5) for stabilizing the voltage supplied to the base. A dissipation device is usually added to the circuit for dissipating currents or voltages occurring in a sense opposite to the sense of conduction of the transistor (1). A simplification of the circuit and hence a decrease in the cost thereof is achieved in that the voltage-stabilizing element (5) also serves as the dissipation device.

REFERENCES:
patent: 3249808 (1966-05-01), Short
patent: 3641407 (1972-02-01), Scott
patent: 3936721 (1976-02-01), Butterworth
patent: 4005335 (1977-01-01), Perper
patent: 4096400 (1978-06-01), Ferry et al.
patent: 4360744 (1982-11-01), Taylor
patent: 4385262 (1983-05-01), Cambler
patent: 4441053 (1984-04-01), Daspit
patent: 4547686 (1985-10-01), Chen

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