Converter wherein a piezoelectric transformer input signal is frequency modulated by a pulse width modulated signal

摘要: In a converter or inverter comprising switching circuit (23) for d.c. input signal into switched signal, piezoelectric transformer (25) driving load (27) with output and an FM modulator (43-47) detecting the to produce rectangular adjusting frequency of duty ratio adjuster (49) is supplied control adjustment signal. Preferably, filter (29) filters transformer. The given high efficiency by use rectifier on producing any event, may comprise first (31) second (33) elements, which be used as active clamp linearize feed forward characteristic ratio.