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US 6,476,542 B2Granted
Piezoelectric transformer with dual-phase input drive
AssigneeCTS Corporation
InventorJames R. Phillips
Life of this patent
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Abstract
The present invention provides at least two input driving sections for a piezoelectric transformer. The two input driving sections are configured in a stacked configuration, with either one section on top of the other or the sections interlaced. Each input driving section includes a pair of electrodes. All of the electrodes preferably have a distinct electrode shape. The two input driving sections provide for the application of phase-modulated input signals to control the gain or amplitude of the transformer output.
Claims9
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.
5 more elements
Dependencies are inferred from the claim text.