Valley-fill power factor correction circuit

Varactor controlled fixed frequency VHF DC-DC converter

Variable bandwith control for power factor correction

Variable charge pumping DC-to-DC converter

Variable frequency controlled zero-voltage switching single-ende

Variable frequency resonant converter

Variable frequency soft switching power supply with reduced nois

Variable frequency, variable voltage power supply

Variable frequency, zero voltage switching, quasi-resonant conve

Variable high-voltage generating circuit

Variable inductance current limiting reactor

Variable input voltage regulator circuit

Variable reactive element in a resonant converter circuit

Variable resonance regulator for power supply

Variable speed a-c drive

Variable speed constant frequency power system with boost conver

Variable speed drive

Variable speed, constant frequency generating system with input

Variable transformer with slidable contactor

Variable voltage direct current power supply and motor speed con