Nowadays more and more electronic loads are connected to single phase grids. All this electric appliances requires a conversion stage at the design stage to transform the alternating current supplied by the network to a direct current. The classic method of single-phase AC/DC conversion involved the use of a full-wave rectifier which allows the passage of the positive half-wave, as well as the passage of the inverted negative half-wave, obtaining an output voltage exclusively positive with period double that of the network. The output voltage can subsequently be filtered to reduce its ripple and "smoothed" by one or more capacitors. Although this method is one of the simplest and cheapest, it has some criticalities that cannot be ignored.