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US 10,651,823 B2Granted
Filter device and multiplexer
AssigneeMurata Manufacturing Co., Ltd.
InventorKenichi Uesaka
Life of this patent
Estimating the term…
Abstract
A filter device includes a terminal, a switch that includes a common terminal and selection terminals and switches a connection of the common terminal to one of the selection terminals, a series arm resonator, and filter circuits. The filter circuits are connected to one end of the series arm resonator. The common terminal is connected to the terminal. One of the selection terminals is connected between one end of the series arm resonator and the filter circuits. Another one of the selection terminals is connected to the other end of the series arm resonator.
Claims20
A filter device comprising:
- a first input/output terminal;
- a first switch that includes a first common terminal and a plurality of first selection terminals and that switches a connection of the first common terminal to one of the first selection terminals;
- a first series arm resonator;
- and
- at least one filter circuit;
- wherein
- the at least one filter circuit is connected to one end of the first series arm resonator;
- the first common terminal is connected to the first input/output terminal;
- one of the first selection terminals is connected between the one end of the first series arm resonator and the at least one filter circuit;
- and
- another one of the first selection terminals is connected to another end of the first series arm resonator.
8 more elements
Dependencies are inferred from the claim text.