Patent ID: 7705567
Filing Date: 2010-04-27
Classification: H02J

Abstract:
1. A capacitor power source including a plurality of capacitors each having curved charging/discharging characteristics in which a voltage change rate resulting from constant current charging/discharging operation becomes smaller in a high voltage region than that in a low voltage region on reaching the vicinity of the inflection-point voltage, comprising: an inflection-point voltage detection circuit for detecting the inflection-point voltage of the capacitor based on a set voltage; an overvoltage detection circuit for detecting the overvoltage of the capacitor; and an initialization circuit for putting charging current of the capacitor into bypass operation using initialization voltage when an initialization mode is selected, wherein charging/discharging control is performed such that a discharging stop signal is generated based on a detection signal of the inflection-point voltage of any one of the plurality of capacitors, a charging stop signal is generated based on a detection signal of the overvoltage of any one of the plurality of capacitors, and an end signal of the initialization charging is generated based on bypass operation signals of the plurality of capacitors.