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US 12,506,463 B2Granted
Filter device
AssigneeMurata Manufacturing Co., Ltd.
InventorYasumasa Taniguchi
Life of this patent
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Abstract
A filter device includes resonators including at least one series arm resonator and at least one parallel arm resonator. The resonators include a parallel arm resonator defining and functioning as a first resonator with a largest fractional bandwidth among the resonators, and at least one second resonator. The filter device includes an inductor connected in series to the first resonator.
Claims16
A filter device, comprising:
- a plurality of resonators including at least one series arm resonator and at least one parallel arm resonator;
- wherein
- the plurality of resonators include a first resonator and at least one second resonator, the first resonator having a largest value of a fractional bandwidth among the plurality of resonators;
- and
- an inductor is connected in series to the first resonator.
2 more elements
Dependencies are inferred from the claim text.