Filter circuit and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorMichiyo Yamamoto
Life of this patent
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Abstract
A filter circuit includes a filter that is disposed on a path connecting a common terminal and an input output terminal and uses a first frequency band as a pass band, a filter that is disposed on a path connecting the common terminal and an input output terminal and uses a second frequency band different from the first frequency band as a pass band, and a phase adjustment circuit that has an input terminal connected to the path and an output terminal connected to the path, and adjusts a phase of a signal in the first frequency band input from the path and outputs a signal having a phase different from a phase of the signal in the first frequency band to the output terminal, wherein the path and the path are paths through which a received signal passes.
Claims9
A filter circuit comprising:
- a first filter that is in a first path and that has a pass band comprising frequencies in a first frequency band, the first path connecting a common terminal and a first input-output terminal;
- a second filter that is in a second path and that has a pass band comprising frequencies in a second frequency band, the second path connecting the common terminal and a second input-output terminal, and the second frequency band being different from the first frequency band;
- and
- a phase adjustment circuit comprising an input terminal connected to the first path between the first filter and the first input-output terminal, and an output terminal connected to the second path between the common terminal and the second filter, the phase adjustment circuit being configured to adjust a phase of a signal in the first frequency band that is input from the first path and to output a signal having a phase different from the phase of the signal in the first frequency band to the output terminal,
- wherein the first path and the second path are configured to pass a received signal.
Dependencies are inferred from the claim text.