Patent ID: 11923828
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. An extractor comprising:
an external connection terminal, a common terminal, a first input-output terminal, and a second input-output terminal;
a band elimination filter that is connected between the common terminal and the first input-output terminal and that uses a first frequency band as a stop band;
a band pass filter that is connected between the common terminal and the second input-output terminal and that uses a second frequency band overlapped with at least a portion of the first frequency band as a pass band; and
a first inductor connected in series or in parallel on a path connecting the common terminal to the external connection terminal; wherein
the band elimination filter has a passband including frequencies above and below the stop band;
the band elimination filter includes:
one or more series arm resonators that each include an acoustic wave resonator and that are located on a series arm connecting the common terminal to the first input-output terminal;
a second inductor that is located on the series arm between the first input-output terminal and the series arm resonator closest to a side of the common terminal, among the one or more series arm resonators; and
one or more parallel arm circuits, at least one of the one or more parallel arm circuits includes a passive element connected between a node on the series arm and ground, without being connected to a resonator; and

the first inductor is inductively coupled to the second inductor.