Patent ID: 11881843
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A filter device comprising:
a first terminal and a second terminal;
a band pass filter including at least two series arm resonators and at least two parallel arm resonators connected between the first terminal and the second terminal; and
a first acoustic wave filter that is connected in parallel with the band pass filter and between the first terminal and the second terminal; wherein
the at least two parallel arm resonators includes a first parallel arm resonator and a second parallel arm resonator;
the first parallel arm resonator is connected between a first node and a ground potential;
the second parallel arm resonator is connected between a second node and the ground potential; and
the two series arm resonators are connected in series directly between the first node and the second node.