Voltage monitoring circuit
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United States of America Patent
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Mar 17, 2015
Grant Date -
Sep 5, 2013
app pub date -
Jan 7, 2013
filing date -
Mar 2, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A voltage monitoring circuit includes: a ripple filter configured to output an output voltage from which a ripple component included in an input voltage, which is input from a voltage source, has been removed; a load configured to operate with the output voltage as a supply voltage and output a first signal through the operation; a comparator configured to compare an electric potential of the output voltage with an electric potential of the first signal and output a second signal when the electric potential difference is equal to or less than a predetermined threshold value; and a control circuit configured to reduce the electric potential of the first signal under the condition that the second signal is input thereto.
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