US 11,942,924 B2
Filter with multiple outputs or inputs to implement multiple filter frequency responses
Lasse Jalmari Toivanen, Espoo (FI)
Assigned to RF360 Singapore Pte. Ltd., Singapore (SG)
Filed by RF360 EUROPE GMBH, Singapore (SG)
Filed on Nov. 23, 2020, as Appl. No. 17/101,857.
Prior Publication US 2022/0166410 A1, May 26, 2022
Int. Cl. H03H 9/64 (2006.01); H03H 9/70 (2006.01)
CPC H03H 9/6406 (2013.01) [H03H 9/703 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a filter comprising a plurality of cascaded resonator stages;
a first set of one or more cascaded resonator stages coupled between an input to the filter and a first output of the filter, each cascaded resonator stage of the first set comprising a first series micro-acoustic resonator and a first parallel micro-acoustic resonator; and
a second set of one or more cascaded resonator stages coupled between the first output of the filter and a second output of the filter, each cascaded resonator stage of the second set comprising a second series micro-acoustic resonator and a second parallel micro-acoustic resonator, wherein the filter is configured to:
apply a first bandpass filter frequency response to a first signal propagating from the input to the filter to the first output of the filter via the first set of one or more cascaded resonator stages; and
apply a second bandpass filter frequency response to a second signal propagating from the input to the filter to the second output of the filter via the first and second sets of cascaded resonator stages.