Patent ID: 6215227
Filing Date: 2001-04-10
Classification: H01L

Abstract:
A piezoelectric transformer, comprising:a first input ceramic layer having first and second opposing major faces and polarized in a direction parallel to an axis normal to said first and second opposing major faces;a first output ceramic layer having first and second opposing faces and polarized in a direction parallel to said axis;a first input electrode adjacent said first major face of said first input ceramic layer and said first face of said first output ceramic layer;a first rigid mass adjacent said second face of said first output ceramic layer;a second rigid mass; anda second input electrode between said second major face of said first input ceramic layer and said second rigid mass;wherein upon application of a first oscillating voltage across said first and second input electrodes, said first input ceramic layer alternatingly expands and contracts in said direction parallel to said axis; andwherein upon said expansion and contraction of said first input ceramic layer in said direction parallel to said axis, said first and second rigid masses move parallel to said axis; andwherein said expansion and contraction of said first input ceramic layer in combination with said movement of said first and second rigid masses in said direction parallel to said axis causes a first oscillating mechanical strain of said first output ceramic layer parallel to said axis; andwherein said first oscillating mechanical strain of said first output ceramic layer piezoelectrically generates a second oscillating voltage between said first and second faces of said first output ceramic layer.