FAIL-SAFE INTERFACE
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United States of America Patent
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Issued Date -
Jun 9, 2016
app pub date -
Dec 1, 2015
filing date -
Dec 3, 2014
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Abstract
A fail-safe interface circuit arranged to provide an inverter enable input to drive an inverter, the circuit being supplied by a first voltage and comprising: a charge pump comprising a charge pump input and a charge pump output, the charge pump output being coupled to a circuit output; and a pulsed input arranged to supply pulsed power to the charge pump input; wherein the charge pump output is arranged to produce a second voltage distinct from the first voltage only when the pulsed input is supplying pulsed power to the charge pump input, and wherein the circuit output is arranged to provide the inverter enable input when the second voltage is produced at the charge pump output.
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