Electronic device, and capacitor capacitance detection method applied to the same
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United States of America Patent
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Jan 30, 2018
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N/A
app pub date -
Jun 10, 2015
filing date -
Dec 24, 2010
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Abstract
According to one embodiment, an electronic device includes a capacitor, a power supply device, a discharger and a capacitance detector. The capacitor is used as a backup power supply. The power supply device charges the capacitor. The discharger discharges the capacitor. The capacitance detector maintains a terminal voltage of the capacitor at a given level for a predetermined time, by controlling an operating time of the power supply device. The capacitance detector allows the discharger to start the discharge the predetermined time later. The capacitance detector detects a capacitance of the capacitor based on a transient response characteristic of the discharge.
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