Alcatel

Roberto Prieto Lopez

Jose Andres Navas Sabater

Mercedes Rivas Saiz

Pedro Alou Cervera

Jos&eacute; Antonio Cobos Marquez

Javier Uceda Antolin

A piezoelectric transformer converts a first voltage, supplied from a voltage source, into a second, different, stabilized voltage by a DC/AC converter followed by a rectifier connected in cascade to a filter. The DC/AC converter block includes a driver block followed by the piezoelectric transformer, such that the driver block feeds the piezoelectric transformer with a pulse train ( ) the frequency of which coincides with the switching frequency (F ) of switching elements included in the driver block. The switching frequency (F ) is less than a resonant frequency (FR) of the piezoelectric transformer; for example, the switching frequency is a sub-harmonic of the resonant frequency (FR).

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Madrid, Spain

Roberto Prieto Lopez