Filter, duplexer, communication module and communication device
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United States of America Patent
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Sep 1, 2015
Grant Date -
Dec 13, 2012
app pub date -
Aug 21, 2012
filing date -
Feb 25, 2010
priority date (Note) -
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Abstract
A filter includes a plurality of primary resonators connected to a serial arm, a plurality of secondary resonators connected to a parallel arm, a primary inductor connected to at least one of the plurality of primary resonators and a secondary inductor connected to at least one of the plurality of secondary resonators. The primary inductor is arranged so as not to be connected to a path between the secondary resonator to which the secondary inductor is connected in parallel and the primary resonator that is connected to the secondary resonator to which the secondary inductor is connected in parallel.
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