Microprocessor watch-dog monitor for electronic trip units
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United States of America Patent
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May 25, 1993
Grant Date -
N/A
app pub date -
Jun 19, 1992
filing date -
Jun 19, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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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