Inventor

LEE FRED C

US123 patents

⚠️ This page may combine multiple inventors who share the name “LEE FRED C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LEE FRED C

VIRGINIA TECH INTELL PROP

Multiphase voltage regulator having coupled inductors with reduced winding resistance

Two-stage voltage regulators with adjustable intermediate bus voltage, adjustable switching frequency, and adjustable number of active phases

Multiphase clamp coupled-buck converter and magnetic integration

Soft-switched quasi-single-stage (QSS) bi-directional inverter/charger

Multi-element resonant converters

Current sensing in multiple coupled inductors by time constant matching to leakage inductance

Multiphase voltage regulator having coupled inductors with reduced winding resistance

Resonant converters with secondary-side resonance

Non-isolated bus converters with voltage divider topology

Quasi-resonant DC-DC converters with reduced body diode loss

Half-bridge zero-voltage switched multi-resonant converters

Zero-voltage-switched multi-resonant converters including the buck and forward type

Accelerated commutation for passive clamp isolated boost converters

Self-oscillating electronic discharge lamp ballast with dimming control

Start-up circuit and control for high power isolated boost DC/DC converters

Current sensing and current sharing

Three-phase zero-current-transition (ZCT) inverters and rectifiers with three auxiliary switches

Multi-loop control for quasi-resonant converters

Quasi-parallel voltage regulator

Phase compensation driving scheme for synchronous rectifiers

Power converters having capacitor resonant with transformer leakage inductance

Adaptive bus voltage positioning for two-stage voltage regulators

Self-driven circuit for synchronous rectifier DC/DC converter

Method and apparatus for reduction of energy loss due to body diode conduction in synchronous rectifiers

Step-down buck converter with full bridge circuit

High input voltage, high efficiency, fast transient voltage regulator module (VRM)

Gas discharge lamp inverter with a wide input voltage range

Multiphase voltage regulator having coupled inductors with reduced winding resistance

Zero voltage zero current three level dc-dc converter

INNOVATIVE TECH CENTER

Soft switched three-phase boost rectifiers and voltage source inverters

Zero-voltage-transition (ZVT) 3-phase PWM voltage link converters

Soft-switching PWM converters

Zero-voltage-transition pulse-width-modulated converters

Novel zero-voltage-switching family of isolated converters

Zero-current transition PWM converters

Zero-voltage transition PWM converters

MATSUSHITA ELECTRIC WORKS LTD

Discharge lamp driving circuit having resonant circuit defining two resonance modes

Power supply for supplying AC output power

LEE FRED C

Zero-current switching quasi-resonant converters operating in a full-wave mode

Zero-voltage switching quasi-resonant converters

(unassigned)

Accelerated commutation for passive clamp isolated boost converters

JOVANOVIC MILAN

Constant frequency zero-voltage-switching multi-resonant converter

VA TECH INTELLECTUAL PROPERTIE

Multi-phase interleaving isolated DC/DC converter

TABISZ WOJCIECH A

Dc-to-Dc converters using multi-resonant switches

CHENG KUANG-YAO

Digital hybrid V2 control for buck converters

BECHTEL INT CORP

Beaded liquid product and method for reducing coefficient of friction

DELTA ELECTRONICS INC

Single-stage input current shaping technique with voltage-doubler rectifier front-end

SGS THOMSON MICROELECTRONICS

Method and apparatus for automatic average current mode controlled power factor correction without input voltage sensing

CATERPILLAR INC

Apparatus for driving a piezoelectric actuator

LI QIAN

Adaptive on-time control for power factor correction stage light load efficiency