Abstract: A multiple output switching power supply having one controlled output and load compensation, where periodical voltage pulses, induced in at least two secondary windings of a transformer, load two buffer capacitive elements, each connected between ground and, respectively a first and a second output terminal at two different, like sign voltages and makes available two output voltages V1, V2, one of which (V1) is controlled, at first and second output terminals, respectively, and where the capacitive element connected between ground and the first terminal includes two series connected capacitors having respective values such that a voltage slightly higher than V2 in absolute value is imparted to the node common to the two capacitors.

Abstract: A switching mode power supply where an input rectified voltage feeds in chopped mode the primary winding of a power transformer under the control of a transistor turned on by voltage pulses periodically generated by an oscillator directly fed by the input voltage and applied to the transistor through a control transformer, said transistor being turned off by a voltage pulse generated by regulating circuits fed by the output voltage of the power supply and applied to the transistor through the same control transformer which is further provided with a winding where anelectromotive force is induced which is proportional to the current flowing through the primary winding of the power transformer.