Patent ID: 6043585
Filing Date: 2000-03-28
Classification: H03H

Abstract:
A filter comprising:a substrate; anda plurality of electrodes disposed over said substrate;wherein a first one of said electrodes surrounds a second one of said electrodes, and a third one of said electrodes surrounds a fourth one of said electrodes, and wherein said first and second electrodes are input terminals of said filter and said third and fourth electrodes are output terminals of said filter; andfurther wherein a first portion of said first electrode and a first portion of said second electrode are situated adjacent to one another on said substrate and form at least a portion of at least one first transducer, a second portion of said first electrode and a first portion of said third electrode are situated adjacent to one another on said substrate and form at least a portion of at least one second transducer, and a second portion of said third electrode and a portion of said fourth electrode are situated adjacent to one another and form at least a portion of at least one third transducer.