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US 2015/0288347 A1Published application
Electroacoustic Filter Comprising Low-Pass Characteristics
AssigneeQUALCOMM Incorporated
InventorsHolger Emrich, Clemens Ruppel, Martin Störkle, Werner Ruile, Thomas Finteis, Tilo Gärtner, Ingo Bleyl, Markus Mayer
Life of this patent
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Abstract
An electroacoustic filter has improved low-pass characteristics. The filter includes a first electroacoustic converter, an electroacoustic element and a grid structure between the converter and the element. The grid structure is acoustically active in one frequency range that lies above the acoustically active frequency range of the first electroacoustic converter.
Claims12
1-11. (canceled)
An electroacoustic filter, comprising:
- an acoustic track;
- a first electroacoustic transducer arranged in the acoustic track, the first acoustic transducer being acoustically active in a frequency range around a center frequency f1;
- an acoustic element arranged in the acoustic track, the acoustic element being acoustically active in the frequency range around the center frequency f1;
- and
- a grid structure arranged in the acoustic track between the first electroacoustic transducer and the acoustic element, wherein the grid structure is acoustically active in a frequency range around a center frequency f2, where f2>f1.
2 more elements
Dependencies are inferred from the claim text.