Load actuation circuit with a surge protecting function

Details Load actuation circuit with a surge protecting function Load actuation circuit with a surge protecting function

H - Electricity

02

H

H02H 3/20 (2006.01) H02H 7/00 (2006.01) H03K 17/082 (2006.01) H03K 17/00 (2006.01)

Patent

CA 2204212

In a load actuation circuit of an emitter-follower circuit arrangement, a surge detection circuit detects a power surge voltage superposed on a power voltage of a power line. A feed circuit supplies current to a control electrode of an output transistor (i.e. emitter-follower transistor) from the power line to turn on the output transistor forcibly when any power surge voltage is detected by the surge detection circuit. Thus, the power surge voltage is absorbed by the output transistor.

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