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1. (WO2017040223) TUNABLE NOTCH FILTER AND CONTOUR TUNING CIRCUIT

Pub. No.:    WO/2017/040223    International Application No.:    PCT/US2016/048792
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Aug 26 01:59:59 CEST 2016
IPC: H04B 1/40
H04B 1/00
H04B 1/401
Applicants: SKYWORKS SOLUTIONS, INC.
Inventors: RIPLEY, David, Steven
LAWRENCE, Edward, F.
ELLIS, Joshua, Kawika
Title: TUNABLE NOTCH FILTER AND CONTOUR TUNING CIRCUIT
Abstract:
Aspects of this disclosure relate tuning an impedance presented to a common port of a multi-throw switch and a tunable notch filter coupled to the common port. The impedance presented to the common port can be tuned based on an impedance associated with a throw of the multi-throw switch that is activated. According to embodiments of this disclosure, a shunt inductor in parallel with a tunable capacitance circuit can tune the impedance presented to the common port of the multi -throw switch. In certain embodiments, the tunable notch filter includes a series LC circuit in parallel with a tunable impedance circuit.