Resonator circuit having greater degrees of freedom, filter with improved tunability, and duplexer with improved tunability
AssigneeSnapTrack, Inc.
InventorEdgar Schmidhammer
Life of this patent
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Abstract
A resonator circuit, a filter with improved tunability, and a duplexer with improved tunability are disclosed. In an embodiment, the resonator circuit includes a resonator, a Z transformer and an impedance circuit, wherein the impedance circuit has an impedance Z and includes an impedance element, wherein the Z transformer is interconnected between the resonator and the impedance circuit, and wherein the Z transformer transforms the impedance Z to a new impedance Z′≠Z and comprises a transformation circuit selected from: a generalized impedance converter (GIC), an negative impedance converter (NIC), a generalized impedance inverter (GII) and an negative impedance inverter (NII).
Claims13
A resonator circuit comprising:
- a resonator;
- an impedance transformer;
- and
- an impedance circuit configured to adjust a frequency spacing between a pole and a resonant frequency of the resonator circuit,
- wherein the impedance circuit has a first impedance and includes an impedance element,
- wherein the impedance transformer is interconnected between the resonator and the impedance circuit, and
- wherein the impedance transformer is configured to transform the first impedance to a second impedance different from the first impedance and comprises a transformation circuit selected from:
- a generalized impedance converter (GIC), an negative impedance converter (NIC), a generalized impedance inverter (GII) and a negative impedance inverter (NII).
Dependencies are inferred from the claim text.