Search Results - microelectronics

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Adaptive On-Time Control for PFC Light Load Efficiency Improvement
Light load efficiency of a power factor correction circuit is improved by adaptive on-time control and providing for selection between a continuous conduction mode and a discontinuous conduction mode wherein the discontinuous conduction mode increases time between switching pulses controlling connection of a cyclically varying voltage to a filter/inductor...
Published: 9/14/2012   |   Inventor(s): Qian Li, Fred Lee, Ming Xu, Chuanyun Wang
Keywords(s): Microelectronics
Category(s): Electrical
Greatly Improving EMI Filter High Frequency Performances Through the Cancellation of Inductive Couplings and Equivalent Series Inductance (ESL) of Capacitors
Because EMI standards are enforced by governments in the world, all electronic equipment uses EMI filters. The parasitics, including parasitics of components and parasitic couplings between components, affect EM1 filter performance significantly. At high frequency range, these parasitics determine filter performance. Usually, in order to reduce couplings...
Published: 9/3/2012   |   Inventor(s): Shuo Wang, Fred Lee, Willem Odendaal
Keywords(s): Microelectronics
Category(s): Electrical