Patent ID: 11916530
Assignee: RF360 SINGAPORE PTE. LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A filter circuit comprising:
a first filter stage comprising:
a first acoustic wave resonator coupled in a series path between a first port of the filter circuit and a second port of the filter circuit;
a first inductor-capacitor (LC) tank circuit;
a first capacitor coupled between a first terminal of the first acoustic wave resonator and the first LC tank circuit, the first LC tank circuit being coupled between the first capacitor and a reference potential node;
a second capacitor coupled between a second terminal of the first acoustic wave resonator and the first LC tank circuit; and
an inductive element coupled between the first LC tank circuit and the reference potential node; and

one or more other filter stages coupled to the first filter stage.