Back to results
US 11,057,018 B2Granted
Acoustically coupled resonator notch and bandpass filters
AssigneeInfineon Technologies AG
InventorsHans-Joerg Timme, Ruediger Bauder, Andreas Bogner
Life of this patent
Estimating the term…
Abstract
A notch filter includes a first inductor coupled between an input node and an output node, a dual-resonator structure coupled between the input node and the output node, and a second inductor coupled between the dual-resonator structure and ground, and a bandpass filter includes a capacitor coupled between an input node and an output node, and a dual-resonator structure coupled between the input node, the output node, and ground.
Claims18
A tunable notch filter comprising:
- a first inductor having a first end directly coupled to an input node and a second end directly coupled to an output node;
- a tunable resonator structure having a first end coupled between the input node and a second end coupled to the output node;
- a second inductor coupled between an internal node of the tunable resonator structure and ground,
- wherein the tunable resonator structure comprises a stacked crystal filter.
1 more element
A tunable notch filter comprising:
- a first inductor having a first end directly coupled to an input node and a second end directly coupled to an output node;
- a tunable resonator structure having a first end coupled between the input node and a second end coupled to the output node;
- a second inductor coupled between an internal node of the tunable resonator structure and ground,
- wherein the tunable resonator structure comprises a coupled resonator filter.
1 more element
A tunable notch filter comprising:
- a first inductor having a first end directly coupled to an input node and a second end directly coupled to an output node;
- a tunable resonator structure having a first end coupled between the input node and a second end coupled to the output node;
- a second inductor coupled between an internal node of the tunable resonator structure and ground,
- wherein the tunable resonator structure comprises a film bulk acoustic resonator.
1 more element
Dependencies are inferred from the claim text.