Microprocessor watch-dog monitor for electronic trip units

H - Electricity – 02 – H

Patent

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Details

H02H 3/00 (2006.01) G05B 19/042 (2006.01) H02H 3/05 (2006.01)

Patent

CA 2115665

A microprocessor watch-dog monitor for electronic trip units includes an input transistor (Q1), a timing circuit (16), and a comparator circuit (18). The comparator circuit is formed of a first bipolar transistor (Q3) of the PNP-type conductivity and a second bipolar transistor (Q4) of the NPN-type conductivity.

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