The present invention relates to a multilamp shared energy-saving electronic ballast. said invention uses alternating current of electric power-supplycircuit, and makes it pass through a high-frequency filtering circuit and a full-wave rectification circuit to make rectification to provide a pulsating D.C. power supply, and then uses a shaping circuit to shape wave form, and then starts a high-frequency oscilating circuit to produce high-frequency pulse output, and then uses the secondary winding of the transformer to supply power. It has the advantages of simple structure, light weight, easy installation, multilamp common use, high power factor, energy-saving and easy maintenance and use, so that it is suitably used as the ballst for several fluorescence lamps. |