Ground leakage current power supply for microprocessor
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United States of America Patent
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Jun 6, 2023
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N/A
app pub date -
Sep 1, 2021
filing date -
May 23, 2019
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Abstract
A power supply, includes: a hot node coupled to a hot wire of an AC source, and a ground node coupled to an earth ground, where a neutral wire of the source is not present; a storage component, coupled to a return node and in series with a current limiter, where the current limiter enables the storage component to charge to a voltage while limiting leakage current to a prescribed value; a low voltage power supply including a linear voltage regulator, coupled to the storage component and to a return node that provides a reference voltage, where the low voltage power supply receives the voltage and generates an output voltage on an output node that is referenced to the reference voltage; and a microprocessor that employs the output voltage to wake from a low power mode to an active mode.
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