Patent ID: 11881842
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A composite filter device comprising:
a connection portion connected to a common terminal;
a first filter between the connection portion and a first terminal;
a second filter between the connection portion and a second terminal;
a first inductor that is connected in series between the second filter and the connection portion, includes a first wiring electrode wound in a predetermined direction, and is provided at at least a first internal layer of a multilayer board; and
a second inductor that is connected in series between the common terminal and the connection portion, includes a second wiring electrode wound in the predetermined direction, and is provided at at least a second internal layer of the multilayer board; wherein
the first wiring electrode and the second wiring electrode at least partially overlap when the multilayer board is viewed in a plan view;
the multilayer board includes a plurality of layers where the first wiring electrode and the second wiring electrode are provided; and
at least a portion of the first wiring electrode is provided at at least two of the layers sandwiching one of the layers where the second wiring electrode is provided or at least a portion of the second wiring electrode is provided at at least two of the layers sandwiching one of the layers where the first wiring electrode is provided.