1MHz multi-resonant push-pull 48V VRM; A FREQUENCY AND VOLTAGE CONTROLLABLE POWER SOURCE FOR LABORATORY USE; A hybrid particle swarm optimization for distribution state estimation; A low-complexity high-performance digital control architecture for Voltage Regulator Modules; A low-voltage regulator circuit with self-bias to improve accuracy; A novel soft-switched, high-frequency, high efficiency, high-current 12V voltage regulator the phase-shift buck convener;