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ELECTRONIC DEVICE, AND CAPACITOR CAPACITANCE DETECTION METHOD APPLIED TO THE SAME

  • US 20120161792A1
  • Filed: 11/28/2011
  • Published: 06/28/2012
  • Est. Priority Date: 12/24/2010
  • Status: Active Grant
First Claim
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1. An electronic device comprising:

  • a capacitor configured for use as a backup power supply;

    a power supply configured to charge the capacitor;

    a discharger configured to discharge the capacitor; and

    a capacitance detector configured tomaintain a terminal voltage of the capacitor for a first time, by controlling an operating time of the power supply,allow the discharger to start the discharge after the first time elapses, anddetect a capacitance of the capacitor based on a transient response characteristic of the discharge.

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