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

Claim 3:
4. 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;
one of the first filter and the second filter is a band pass filter that passes signals in a predetermined frequency band;
another one of the first filter and the second filter is a band elimination filter that attenuates signals in the predetermined frequency band; and
the band elimination filter is a notch filter.