The electronic device used by dentists

The present invention relates to a generator suitable for supplying a dental curing light. The present invention relates to a piezoelectric motor generator, which is also adapted to supply power LED dental curing lamp. The generator comprising: two transformers (11A, 11B), each comprising a primary winding (L1) and a secondary winding (L2 of); and four switches controlled by the ultrasound frequency oscillator (19A, 19B, 21A, 21B) . Two switches (21A, 21B) are alternately arranged to the secondary winding of the transformer is connected to two piezoelectric load (5), and the other two switches (19A, 19B) is arranged to alternately connect to the two primary windings voltage source (17), such that during the "positive" half cycle, one of the primary winding of the transformer secondary winding is charged and discharged to another piezoelectric transformer load (5), and that during the "negative" half-cycle, the primary winding of the first transformer secondary winding of the first transformer and the discharge is charged.