High voltage sine wave power supply

A resonant circuit sine wave power supply comprising, a transformer (64), at least one resonant circuit (16, 18) coupled to the primary (62) of transformer (64), and sources of positive and negative dc voltages, characterized in

• a first switching network (8, 14) coupled between the source of positive dc voltage and the resonant circuit (16, 18), a second switching network (42, 48) coupled between the source of negative dc voltage and the resonant circuit (16, 18), a third switching network (24) coupled between the resonant circuit (16, 18) and a reference potential, a fourth switching network (52) coupled between the resonant circuit (16, 18) and a reference potential, and switching means (a) for alternately switching the first and second switching networks to conduction during portions of the power generation cycle and (b) for alternately rendering one of the third or fourth switching networks conductive when the first and second switching networks are non-conductive, whereby non-heat dissipative current flow is provided throughout the entire power generation cycle.