Chopper-stabilized power supply

Claim 1

A chopper-stabilized power supply comprising a switching transistor and an integrating filter connected between a source of unstabilized d.c. energy and a load circuit, a voltage comparator for comparing the output voltage of the power supply to a reference voltage and for delivering rectangular signals of variable width and constant repetition frequency or constant width and variable repetition frequency, a control transistor connected by its base to said voltage comparator for furnishing a control current to the base of said switching transistor, the emitter-collector circuit of said control transistor being connected in series with an inductor which is connected to one terminal of said source and which is constituted by the primary winding of a transformer, said transformer including a secondary winding connected to said one terminal and in series with a diode to the base of said switching transistor for neutralizing the charge carriers present in the junction of said switching transistor at each cut-off of the current of the control transistor and said transformer further including an additional secondary winding connected to said one terminal and in series with a further diode to the base of said control transistor.