Patent ID: 6549099
Filing Date: 2003-04-15
Classification: H03H

Abstract:
An electrically-coupled, mechanical band-pass filter fabricated on a substrate, comprising:first and second masses, each mass being independently movable in a direction of motion relative to the substrate and to the other mass; a first spring element having one end attached to the substrate and the other end attached to the first mass; a second spring element having one end attached to the first mass and the other end attached to the second mass, the second mass being connected only to the first mass; an input transducer for receiving an input frequency and applying an input force to the first mass, the input force having a force component in the direction of motion of the first mass, the input force being influenced by the input frequency; and an output transducer associated with the first and second masses for providing an output frequency influenced by the relative motion between the first and second masses.