Patent ID: 7403199

Claim:
An energy recovery circuit, comprising: a panel capacitor; a source capacitor for recovering a voltage from the panel capacitor, and supplying the voltage charged to the source capacitor to the panel capacitor; a reference voltage supply unit; an inductor disposed between the source capacitor and the panel capacitor; a first switch disposed between the inductor and the source capacitor, for forming a charge path of the panel capacitor; a second switch disposed between the inductor and the reference voltage supply unit, for forming a discharge sustaining path of the panel capacitor; a third switch disposed between the inductor and the source capacitor, for forming a discharge path of the panel capacitor; and a fourth switch connected between the inductor and a base potential, for forming a path for sustaining the base potential of the panel capacitor, wherein the reference voltage supply unit supplies a rising pulse rising to a predetermined reference voltage to the panel capacitor and the source capacitor respectively at an initial time point in which the panel capacitor and the source capacitor are not charged with a voltage and supplies a reference voltage to the panel capacitor in a normal operation period.