Operator coil parameter based electromagnetic switching
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United States of America Patent
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Sep 11, 2018
Grant Date -
May 12, 2016
app pub date -
Aug 21, 2015
filing date -
Nov 6, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment describes an operating coil driver circuitry, which includes a control circuitry that outputs a trigger signal and a reference voltage; an operational amplifier that compares the reference voltage to a node voltage, in which the node voltage is directly related to current flowing through an operating coil of a switching device and the operational amplifier outputs a logic high signal when the node voltage is higher than the reference voltage and outputs a logic low signal when the node voltage is lower than the reference voltage; and a flip-flop that outputs a pulse-width modulated signal to instruct a switch to supply a desired current to the operating coil based at least in part on the trigger signal and the signal output by the operational amplifier.
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