US 12,355,428 B2
System and method for integrated filtering and amplification
Ali Fard, Corona Del Mar, CA (US); Mats Carlsson, Sundbyberg (SE); Jan Rapp, Hässelby (SE); David Westberg, Uppsala (SE); and Omid Esmaeilzadeh Najari, San Diego, CA (US)
Assigned to QuantaIRF AG, (CH)
Filed by QuantaIRF AG, Zurich (CH)
Filed on Aug. 29, 2023, as Appl. No. 18/458,089.
Claims priority of provisional application 63/402,882, filed on Aug. 31, 2022.
Prior Publication US 2024/0080017 A1, Mar. 7, 2024
Int. Cl. H03H 9/60 (2006.01); H03H 7/01 (2006.01); H03H 7/09 (2006.01); H03H 9/205 (2006.01); H03H 9/54 (2006.01); H03H 11/04 (2006.01); H03K 17/687 (2006.01)
CPC H03H 9/605 (2013.01) [H03H 7/0138 (2013.01); H03H 7/0161 (2013.01); H03H 7/09 (2013.01); H03H 9/205 (2013.01); H03H 9/542 (2013.01); H03H 11/04 (2013.01); H03H 2007/013 (2013.01); H03K 17/6872 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An integrated circuit coupled resonator filter comprising:
a low-noise amplifier;
a first parallel resonator including a first capacitance connected in parallel with a first inductance;
a second parallel resonator including a second capacitance connected in parallel with a second inductance;
a third parallel resonator including a third capacitance connected in parallel with a third inductance, the third parallel resonator being coupled to an input of the low-noise amplifier;
a first coupling capacitance connected between the first parallel resonator and the second parallel resonator, the coupling capacitance capacitively coupling the first parallel resonator and the second parallel resonator;
a second coupling capacitance connected between the second parallel resonator and the third parallel resonator, the second coupling capacitance capacitively coupling the second parallel resonator and the third parallel resonator;
wherein magnetic coupling between the first inductance and the second inductance magnetically couples the first parallel resonator and the second parallel resonator in accordance with a first coupling factor;
wherein magnetic coupling between the second inductance and the third inductance magnetically couples the second parallel resonator and the third parallel resonator in accordance with a second coupling factor;
wherein magnetic coupling between the first inductance and the third inductance magnetically couples the first parallel resonator and the third parallel resonator in accordance with a third coupling factor;
wherein a frequency response of the coupled resonator filter includes a notch when values of the first coupling factor, the second coupling factor and the third coupling factor satisfy predetermined conditions.