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| Number | Title | Issue Date |
| 7944156 | Electronic ballast for high intensity discharge lamps The present High Intensity Discharge electronic lamp ballast uses a “set of controls” that can be performed by controlling energy delivery by the “line side converter” to the “lamp side inverter”. This set of controls comprises: 1) open circuit voltage c... | 05/17/2011 |
| 7706161 | Single stage resonant power converter with auxiliary power source The improved single stage power converter circuit topology substantially reduces EMI that is conducted to the AC line, reduces input AC current inrush, improves output ripples by the use of an auxiliary supply near zero crossings of the line AC voltage, provides Pow... | 04/27/2010 |
| 7541791 | Switch mode power converter having multiple inductor windings equipped with snubber circuits The present switch mode power converter having multiple inductor windings equipped with snubber circuits uses a small value inductor that has at least one properly oriented secondary winding, and ultra fast diodes interconnect the primary and the secondary windings ... | 06/02/2009 |
| 7379291 | Enclosed electronic ballast housing The enclosed electronic ballast housing provides improved convection heat transfer for lowering the ambient housing temperature for keeping the junction temperature of power semiconductors inside the enclosed electronic ballast housing within certain specified tempe... | 05/27/2008 |
| 7199528 | Control circuit for maintaining constant power in power factor corrected electronic ballasts and power supplies The control circuit for maintaining constant power in power factor corrected electronic ballasts and power supplies maintains constant power in a variable load. This constant power control circuit provides a closed loop constant power management process for gas disc... | 04/03/2007 |
