A magnetic square wave voltage generator comprising at least one core having both a high impedance flux path and a low impedance flux path. An input winding couples each of the high and low impedance flux paths and one output winding couples the high impedance flux path and another output winding couples the low impedance flux path. The two output windings are series connected and when a sinusoidal signal is applied to the input winging it results in a square wave output signal across both series connected output windings.