Patent ID: 8432236
Filing Date: 2013-04-30
Classification: H03H

Abstract:
1. A highly integrated electrical module, comprising: a substrate having a top side; a cover, which is arranged above the top side of the substrate, having an underside facing the substrate; a layer construction arranged on the top side of the substrate, the layer construction comprising a filter circuit that includes a bulk acoustic wave (BAW) resonator, wherein a piezo-layer is arranged between two electrode layers in the layer construction; and a balun circuit having an interconnection of capacitive and inductive elements, the balun circuit being electrically connected in series with the filter circuit; wherein the substrate and the cover are parts of a housing enclosing the layer construction, the inner sides of the housing being formed at least in part by the top side of the substrate and the underside of the cover, wherein at least one circuit element of the balun circuit is arranged at least in part on an inner side of the housing, and wherein the balun circuit includes a capacitive element, the capacitive element being integrated in the layer construction.