US 12,170,515 B2
Reversed semilattice filter
Marcus Granger-Jones, Scotts Valley, CA (US); and Yazid Yusuf, Orlando, FL (US)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Jan. 31, 2022, as Appl. No. 17/588,836.
Prior Publication US 2023/0246633 A1, Aug. 3, 2023
Int. Cl. H03H 9/54 (2006.01); H03H 9/205 (2006.01)
CPC H03H 9/542 (2013.01) [H03H 9/205 (2013.01); H03H 9/547 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A filter comprising:
a first impedance path between an input node and an output node, the first impedance path comprising a first impedance and a second impedance serially connected to one another and defining a first node therebetween;
a second impedance path between the input node and the output node, the second impedance path electrically parallel to the first impedance path, the second impedance path comprising a third impedance and a fourth impedance serially connected to one another and defining a second node therebetween, the first impedance path and the second impedance path comprising a reversed semilattice filter;
a first inductor coupled the first node;
a second inductor serially coupling the first inductor to the second node; and
a resonant circuit associated with the first inductor and the second inductor, the resonant circuit configured to lower a common mode impedance for the filter at a predetermined notch frequency.