| 摘要 |
Provided is a filter device which can dispense with an impedance matching circuit. This filter device 1 comprises a first through a third filter circuit F1-F3 which are connected to a common terminal 2. The first filter circuit F1 comprises a first inductor 5a, which is nearest to the common terminal 2 on a first signal line 4, and a first capacitive element 6a which is connected in parallel to the first inductor 5a. The second filter circuit F2 comprises a series arm resonator S1 which is a second acoustic resonator nearest to the common terminal 2 on a second signal line 10, and the third filter circuit F3 comprises a third acoustic resonator 13a which is arranged nearest to the common terminal 2 on a third signal line 12. |
