Piezoelectric transformer with multiple output

US5892318A · kind A · utility

Assignee

• Motorola, Inc. · US

Inventors

• Xunhu Dai · Gilbert, US
• James R. Phillips · New York, US

Key dates

• Filing date: Jan 2, 1997
• Grant date: Apr 6, 1999
• Expiry date: Jan 2, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/40

Abstract

A piezoelectric ceramic transformer made from a piezoelectric ceramic material stacked in a multilayer package which has a driving section 502 formed by alternately stacking piezoelectric ceramic layers polarized in a direction of thickness of the piezoelectric plate. The driving section 502 has internal interdigitated electrode layers 504A, 504B for causing piezoelectric vibration by a driving voltage applied to an input terminal (Vin). A first driven section 506, also made from piezoelectric ceramic layers polarized in the longitudinal direction of the piezoelectric plate, for generating a first output voltage (Vout1) at a first output by the piezoelectric vibration transmitted from the driving section 502. A second driven section 510, made from piezoelectric ceramic layers polarized in the thickness direction of the piezoelectric plate, for generating a second output voltage (Vout2) at a second output by the piezoelectric vibration transmitted from the driving section 502. Thus, a piezoelectric ceramic multilayer transformer with a multiple output is created.