Overtemperature sensing and signaling circuit
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United States of America Patent
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Mar 30, 1993
Grant Date -
N/A
app pub date -
Jun 19, 1992
filing date -
Jun 19, 1992
priority date (Note) -
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Abstract
An overtemperature sensing and signaling circuit for electronic trip units includes a voltage divider (16) and a trigger circuit (18). The voltage divider is formed of a first resistor (R1) and a positive coefficient resistor (PT1). The trigger circuit is formed of a first bipolar transistor (Q1) of the PNP-type conductivity and a second bipolar transistor (Q2) of the NPN-type conductivity.
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