minimum duty cycle a minimum duty cycle of operation of the pulse width modulator 54 results in the providing of drive signals of short pulse width to the switching circuit 51 which typically includes a plurality of switching transistors 55 as the various transistors 55 within the switching circuit 51 are rendered conductive in response to the pulsed out from the pulse width modulator 54 the output of an inverter transformer 53 coupled to and energized by an output signal from the switching circuit 51 is rectified by a plurality of output rectifiers 56 which include various diodes 57 the dc output of the output rectifiers 56 is provided to various output filters 58 which include output capacitors 65 which are slowly charged by the low duty cycle output of the pulse width modulator 54 when the dc output of the rectified line voltage source 12 provided to the positive input terminal of the comparator 26 becomes greater than the reference voltage level provided to its negative input terminal capacitor 34 starts charging and finally reverse biases diode 38 rendering it nonconductive with the output of error amplifier 59 no longer shunted with the lower impedance capacitor 34 via the comp input pin of the pulse width modulator 54 the output of error amplifier 59 is free to go high and subsequently the duty.