Abstract: A converter powered by an alternating network drawing therefrom a current with a power factor close to unity and a non-linear distortion factor close to five percent, wherein the amplitude of the current applied to an output load remains substantially constant. A bridge circuit is provided using switches and capacitors wherein the reactance at the quench frequency is selected such that a portion of the converted energy is added between the terminals of an output capacitor to the main current rectified by a bridge. A buffer source has a direct voltage with substantially constant amplitude which enables balancing of the generated voltages, thereby eliminating the risk of destruction by uncontrollable excess voltages.