Patent ID: 7616079
Filing Date: 2009-11-10
Classification: H03H

Abstract:
1. A filter comprising resonators for use with bulk acoustic waves, each of the resonators for use with bulk acoustic waves comprising: wherein two of the resonators are in a stacked crystal filter arrangement, the two of the resonators comprising two bulk acoustic wave resonators, the stacked crystal filter arrangement of the two bulk acoustic wave resonators comprising: wherein an additional resonator is connected to the stacked crystal filter arrangement so that a combination of the two resonators and the additional resonator form an element of a lattice-type filter or a ladder-type filter, the additional resonator comprising a bulk acoustic wave resonator or an inductive-capacitive (LC) resonator; a capacitor in series or in parallel with one of the two resonators in the stacked crystal filter arrangement, and a multilayer substrate, wherein the capacitor is integrated into the multilayer substrate, the capacitor comprising structured metal layers within the multilayer substrate.