Control circuit for the switching of inductive loads having a pu

Details Control circuit for the switching of inductive loads having a pu Control circuit for the switching of inductive loads having a pu

1983-03-17

1986-09-16

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307280, 307246, 307270, 307596, 307254, H03K 333, H03K 1760

Patent

active

046124527

ABSTRACT:
A control circuit for the switching of inductive loads which is monolithically integratable and includes an output stage having push-pull transistors. The base of each transistor of the output stage is connected to a driver circuit and to an auxiliary transistor which is biased in saturation. Each auxiliary transistor is driven to conduction in phase opposition with respect to the final transistor to which it is connected. The auxiliary transistor accelerates the turn-off of the final transistor, withdrawing the base charge, while delaying the turn-on thereof and absorbing the current fed thereto for a period of time equal to that of its own turn-off transient; in this way, the simultaneous conduction of the transistors of the final stage during the switching thereof can be avoided.

REFERENCES:
patent: 3828208 (1974-08-01), Kelleher
patent: 4095128 (1978-06-01), Tanigaki

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