through device 55 and into output load 53 continuing into device 58 and then into ground 64 when gate drive signal 52 turns on devices 56 and 57 through resistors 60 and 61 respectively current flows from the vdc power supply terminal 63 through device 57 and into output load 53 continuing into device 56 and then into ground the current flowed in the opposite direction through output load 53 during this second half cycle the cycle repeats when gate drive signal 51 turns on devices 55 and 58 during the next cycle note that the gate drive signals 51 and 52 are variable pulse width signals with duty cycles less than fifty percent and ninety degrees out of phase of each other keeping one set of devices off e g 56 and 57 while the other devices are on 55 and 58 power delivered to the output load 53 in this example is decreased by reducing the duty cycle to both gate drive signals 51 and 52 or increased by increasing the duty cycle of both gate drive signals 51 and 52 during operation of the preferred embodiment described herein when the switching device 12 is on charge from the capacitance 15 flows into the inductance 13 and is stored there as energy in the magnetic field then when the switching device is off this energy in the inductor 13 flows through the diode 14 back to the vdc power supply 18 according to one aspect of the invention the higher the.