US 12,113,511 B2
Bridge-type filters
Edgar Schmidhammer, Stein an der Traun (DE); Marc Esquius Morote, Munich (DE); and Juha Sakari Ella, Salo (FI)
Assigned to RF360 Singapore Pte. Ltd., Singapore (SG)
Filed by RF360 SINGAPORE PTE. LTD., Republic Plaza (SG)
Filed on Sep. 22, 2022, as Appl. No. 17/934,437.
Claims priority of provisional application 63/269,441, filed on Mar. 16, 2022.
Prior Publication US 2023/0299742 A1, Sep. 21, 2023
Int. Cl. H03H 9/54 (2006.01); G06F 3/14 (2006.01); H03H 9/205 (2006.01); H03H 9/52 (2006.01); H03H 9/70 (2006.01)
CPC H03H 9/542 (2013.01) [G06F 3/14 (2013.01); H03H 9/205 (2013.01); H03H 9/52 (2013.01); H03H 9/70 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a filter circuit comprising:
a first port;
a second port;
a first filter core comprising a bridge-type filter architecture having multiple acoustic resonators, the first filter core coupled between the first port and the second port; and
a second filter core comprising a bridge-type filter architecture having multiple acoustic resonators, the second filter core coupled between the first port and the second port,
the first filter core and the second filter core cascaded in series between the first port and the second port; wherein:
the filter circuit comprises a first inductor;
the filter circuit comprises a second inductor;
the first inductor is coupled in series with respect to multiple acoustic resonators of the first filter core and multiple acoustic resonators of the second filter core; and
the second inductor is coupled in series with respect to the multiple acoustic resonators of the first filter core and the multiple acoustic resonators of the second filter core.