Electroacoustic filter with reduced plate modes
AssigneeSnapTrack, Inc.
InventorsSebastian BERTL, Carsten POTRATZ
Life of this patent
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Abstract
A filter with reduced plate modes is specified. Thereto, the filter has a transducer system (WS) with two or more electroacoustic split transducers (TW) connected in parallel that replace a conventional transducer (W). The static capacity of the transducer system corresponds to the sum of the static capacities of the split transducers. Each split transducer has a lower electroacoustic coupling of a desired mode than the transducer system. The transducer system has an electroacoustic coupling of a plate mode corresponding to the electroacoustic coupling of the plate mode of a split transducer.
Claims7
An electroacoustic filter (F), comprising:
- a plurality of transducers (W);
- and
- an inductive element (IE) connected to a single transducer (W) of the plurality of transducers that does not have a highest electroacoustic coupling of a plate mode among the plurality of transducers.
4-9. (canceled)
A method for creating an electroacoustic filter (F), comprising:
- analyzing an electroacoustic coupling strength of a plate mode in each of a plurality of transducers (W);
- and
- replacing a single transducer (W) of the plurality of transducers having a highest electroacoustic coupling strength of the plate mode with a transducer system (WS) comprising a plurality of split transducers (TW) connected in parallel, such that the electroacoustic coupling strength of the plate mode of the transducer system (WS) is limited to the electroacoustic coupling strength of the plate mode of one of the split transducers (TW).
A method for creating an electroacoustic filter (F), comprising:
- analyzing an electroacoustic coupling strength of a plate mode in each of a plurality of transducers (W);
- and
- adding a serial or parallel inductive element (IE) to one of the plurality of transducers that does not have a highest electroacoustic coupling strength of the plate mode.
Dependencies are inferred from the claim text.