Abstract: A push pull inverter has a pair of chopper transistors connected to opposite ends of a center tapped primary of an output transformer and off drive clamps for turning the chopper transistors off alternately under the control of an oscillator. On drive is provided entirely by feedback derived from a secondary winding on the transformer and coupled to the base circuits of the chopping transistors. When the oscillator causes one transistor to be clamped off, the resulting reversal of polarities in the transformer delivers on-drive to the other transistor base. Since the off-switching of the first transistor causes the on-switching of the second transistor in a sequential manner, the two can never be on at the same time, despite the effects of minority carrier storage in the switching transistors.