a negligible delay time interval tr the distortion factor is not zero t on t the discharge switch 39 is in this case closed when the signal q is high and the control signal gd is also high i e during the on interval t on whereas it is off when the signal q is low and the control signal gd is also low i e during the off interval t off of the switching period t u03b8 also in this case the discharge of the charging capacitor 36 occurs during the time interval in the switching period t during which the current i l is non zero with the current i l that flows in this case through the inductor element 5 constituted by the primary winding of the transformer it follows that in this embodiment the pre distortion factor by which the control voltage v c in the pre distortion stage 32 is multiplied is given by for completeness hereinafter all the significant equations relating to this further embodiment are in any case provided moreover in a way similar to what has been discussed previously fig1 shows the main electrical quantities in the power converter 1 u2032 applying as discussed previously considerations of charge balance with respect to the charging capacitor 36 of the pre distortion stage 32 considering that also in this case the aforesaid eq 13 is valid the following expression is obtained moreover considering that v r _ pk v ct.