Filtering circuit which is tunable in frequency integrable, comprising a set of baw resonators

摘要

The filter has two primary two-port networks (61, 62), in which the network (61) has an inductor (15) whose electrodes are respectively connected one of electrodes of a varactor and an input of the filter. The network (61) has a secondary two-port network (10) with four bulk acoustic wave (BAW) resonators, and another inductor (16) whose electrodes are respectively connected to outputs of the secondary network. Electrodes of the resonators are respectively connected to inputs and outputs of the secondary network.