In a switch mode power supply, a full wave rectified AC mains supply voltage is produced from an AC mains supply voltage without low-pass filtering. The unfiltered rectified voltage is applied to a winding of a flyback transformer that is coupled to a switching transistor. A first plurality of current...http://www.google.fr/patents/US5349515?utm_source=gb-gplus-shareBrevet US5349515 - Switch mode power supply with feed-forward pulse limit control
Switch mode power supply with feed-forward pulse limit control