Patents

• 11,239,745 Power converter including a recirculating snubber
• 11,162,988 Load impedance tester and measurement method
• 10,164,520 Short circuit protection for switching power converters
• 8,462,525 Wide range DC power supply with bypassed multiplier circuits
• 7,619,910 Interleaved soft switching bridge power converter
• 7,289,341 Power supply adaptive feed forward control circuit
• 7,247,998 Transient detection of end of lamp life condition apparatus and method
• 7,228,793 Carbonation system for enhancing the flavor of fruits and vegetables
• 6,979,980 Soft switching interleaved power converter
• 6,697,265 Wide range DC power supply utilizing voltage doubling output capacitors and
inductive choke to extend full power load impedance range
• 6,291,944 System and method for limiting through-lamp ground fault currents in non-isolated
electronic ballasts
• 6,281,641 Electronic ballast for one or more lamps
• 6,262,565 Electrical load switch
• 6,204,613 Protected dimming control interface for an electronic ballast
• 5,959,408 Symmetry control circuit for pre-heating in electronic ballasts
• 5,877,592 Programmed-start parallel-resonant electronic ballast
• 5,838,181 Pulse-width modulator for use in low-cost power factor correction circuit
• 5,831,395 Three-way fluorescent adapter
• 5,731,666 Integrated-magnetic filter having a lossy shunt
• 5,650,925 Diode clamping arrangement for use in electronic ballasts
• 5,635,799 Lamp protection circuit for electronic ballasts
• 5,614,810 Power factor correction circuit
• 5,583,402 Symmetry control circuit and method
• 5,568,041 Low-cost power factor correction circuit and method for electronic ballasts
• 5,166,869 Complementary electronic power converter
• 4,922,227 Touch-controlled switch and alarm system