FILTER DEVICE COMPRISING TWO CONNECTED FILTER CIRCUITS
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United States of America Patent
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Issued Date -
Aug 11, 2022
app pub date -
Jul 9, 2020
filing date -
Jul 26, 2019
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Abstract
A filter device having a reduced sensitivity to production tolerances comprises a multilayer panel with integrated wiring, a piezoelectric substrate mounted to the panel. A first filter circuit (FC1) and a signal path (SP) comprising a second filter circuit are realized on the substrate and connected to a common antenna terminal (AT) as well as to a common node (CN) located on top of the piezoelectric substrate. A first matching circuit (MC1) and further matching circuits (MC2) are realized by the wiring in the multilayer panel.
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