Patent ID: 7952296
Filing Date: 2011-05-31
Classification: H02M,H05B,Y02B

Abstract:
1. A feedback circuit for a direct-current-to-alternating-current (DC/AC) inverter, the DC/AC inverter comprising a first power switch and a second power switch for driving a fluorescent lamp, the feedback circuit comprising: a protection circuit for disabling the first power switch and the second power switch when no fluorescent lamp is electrically connected thereto; a first capacitor having a first terminal electrically connected to an output of the DC/AC inverter, and a second terminal; a second capacitor having a first terminal electrically connected to a ground, and a second terminal electrically connected to the second terminal of the first capacitor; a diode having an anode terminal electrically connected to the second terminals of the first and second capacitors, and a cathode terminal electrically connected to the protection circuit of the DC/AC inverter; and a first resistor having a first terminal electrically connected to the cathode terminal of the diode, and a second terminal electrically connected to the ground.