Patent application number | Description | Published |
20100046264 | GENERALIZED AC-DC SYNCHRONOUS RECTIFICATION TECHNIQUES FOR SINGLE- AND MULTI-PHASE SYSTEMS - Various circuit configurations and topologies are provided for single and multi-phase, single-level or multi-level, full and half-bridge rectifiers in which diodes are replaced by combinations of voltage-controlled self-driven active switches, current-controlled self-driven active switches and inductors in order to reduce the effects of conduction loss in the diodes. | 02-25-2010 |
20100270930 | APPARATUS AND METHODS OF OPERATION OF PASSIVE LED LIGHTING EQUIPMENT - This invention is concerned with the control and design of a LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15000 hours, the proposed system can be developed with passive and robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. No extra electronic control board is needed for the proposed passive circuits, which can become dimmable systems if the ac input voltage can be adjusted by external means. Optionally, the power sensitivity of the load against AC voltage fluctuation may be controlled. | 10-28-2010 |
20100270931 | APPARATUS AND METHODS OF OPERATION OF PASSIVE LED LIGHTING EQUIPMENT - This invention is concerned with the control and design of a LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15000 hours, the proposed system can be developed with passive and robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. No extra electronic control board is needed for the proposed passive circuits, which can become dimmable systems if the ac input voltage can be adjusted by external means. | 10-28-2010 |
20100270941 | APPARATUS AND METHODS OF OPERATION OF PASSIVE LED LIGHTING EQUIPMENT - This invention is concerned with the control and design of a LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15000 hours, the proposed system can be developed with passive and robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. No extra electronic control board is needed for the proposed passive circuits, which can become dimmable systems if the ac input voltage can be adjusted by external means. | 10-28-2010 |
20100270942 | APPARATUS AND METHODS OF OPERATION OF PASSIVE LED LIGHTING EQUIPMENT - This invention is concerned with the control and design of a LED lighting system that does not need electrolytic capacitors in the entire system and can generate light output with reduced luminous flux fluctuation. The proposal is particularly suitable, but not restricted to, off-line applications in which the lighting system is powered by the ac mains. By eliminating electrolytic capacitors which have a limited lifetime of typically 15000 hours, the proposed system can be developed with passive and robust electrical components such as inductor and diode circuits, and it features long lifetime, low maintenance cost, robustness against extreme temperature variations and good power factor. No extra electronic control board is needed for the proposed passive circuits, which can become dimmable systems if the ac input voltage can be adjusted by external means. | 10-28-2010 |
Patent application number | Description | Published |
20080309431 | PLANAR EMI FILTER - An EMI filter for use between a power source and an electronic product is formed of at least one planar element including a pair of opposed coreless spiral planar windings, and a planar capacitor. This enables the integration of common mode and differential mode filters into integrated planar structures. | 12-18-2008 |
20090146755 | PLANAR EMI FILTER - An EMI filter for use between a power source and an electronic product is formed of at least one planar element including a pair of opposed coreless spiral planar windings, and a planar capacitor. This enables the integration of common mode and differential mode filters into integrated planar structures. Furthermore the planar EMI filter may be combined with an active filter element to provide a hybrid EMI filter comprising both passive and active elements with superior performance. | 06-11-2009 |
20120068301 | MONOLITHIC MAGNETIC INDUCTION DEVICE - Providing for a monolithic magnetic induction device having low DC resistance and small surface area is described herein. By way of example, the magnetic induction device can comprise a substrate (e.g., a semiconductor substrate) having trenches formed in a bottom layer of the substrate, and holes formed in the substrate between the trenches and an upper layer of the substrate. Additionally, the magnetic induction device can comprise a conductive coil embedded or deposited within the trenches. The magnetic induction device can further comprise a set of conductive vias formed in the holes that electrically connect the bottom layer of the substrate with the upper layer. Further, one or more integrated circuit components, such as active devices, can be formed in the upper layer, at least in part above the conductive coil. The vias can be utilized to connect to integrated circuit components with the conductive coil, where suitable. | 03-22-2012 |