Patent ID: 6476542
Filing Date: 2002-11-05
Classification: H01L

Abstract:
A gain-adjustable piezoelectric transformer comprising:a multilayer body of piezoelectric material having an input section and an output section, the input section including a pair of independently-drivable subsections, each independently-drivable subsection having a plurality of piezoelectric layers, a first connected set of interlayer electrodes and a second connected set of interlayer electrodes, the electrodes of the first set being interlaced with the electrodes of the second set; and an input circuit providing a first driving signal and a second driving signal having an externally adjustable phase relationship therebetween, the first of the pair of subsections being configured to receive the first driving signal into the first set and second set of electrodes; the second of the pair of subsections being configured to receive the second driving signal into the first set and second set of electrodes, whereby an adjustment in the phase relationship between the driving signals causes an adjustment in transformer gain.