DUAL-INPUT DUAL-OUTPUT FLITERING DEVICE USING BULK ACOUSTIC WAVE RESONATOR AND RESONANCE DEVICE USED AS THE BULK ACOUSTIC WAVE RESONATOR

摘要

PURPOSE: A dual-input dual-output filtering device using bulk acoustic wave resonator and resonance device used as the bulk acoustic wave resonator are provided to reduce the number of devices by arranging the dual-input dual-output filtering device on the following stage of an analog RF area. CONSTITUTION: A filtering device comprises a bridge(110) and a first ladder(120). The bridge comprises a first BAWR, a second BAWR, a third BAWR, and a fourth BAWR which are connected in series. The third BAWR is connected to an input stage of the first BAWR and an output stage of the second BAWR. The fourth BAWR is connected to the output stage of the first BAWR and an input stage of the second BAWR.