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US 6,713,940 B2Granted
Surface acoustic wave device
AssigneeMurata Manufacturing Co., Ltd.
InventorYuichi Takamine
Life of this patent
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Abstract
A surface acoustic wave device includes a plurality of surface acoustic wave filters having different center frequencies contained in a package. In the surface acoustic wave device, one of the input terminal or the output terminal of at least one of the plurality of surface acoustic wave filters is a balanced terminal and the other is an unbalanced terminal.
Claims17
A surface acoustic wave device comprising:
- a package;
- a plurality of surface acoustic wave filters having different center frequencies and included in said package;
- and
- an impedance matching element;
- wherein
- one of an input terminal and an output terminal of at least one of said plurality of surface acoustic wave filters is a balanced terminal and the other of the input terminal and the output terminal of said at least one of said plurality of surface acoustic wave filters is an unbalanced terminal;
- one of the input terminal and the output terminal of each of said plurality of surface acoustic wave filters is a balanced terminal and the other of the input terminal and the output terminal of each of said plurality of surface acoustic wave filters is an unbalanced terminal;
- and
- the unbalanced terminal is shared among said plurality of surface acoustic wave filters;
- said impedance matching element is connected to the shared unbalanced terminal;
- and
- said impedance matching element is an inductor connected in parallel to the unbalanced terminal.
9 more elements
Dependencies are inferred from the claim text.