MEMS tunable notch filter frequency automatic control loop systems and methods
AssigneeWispry, Inc.
InventorsQizheng Gu, Javier Rodriguez De Luis, Arthur S. Morris, III
Life of this patent
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Abstract
Tunable notch filters and control loop systems and methods can include a tunable notch filter providing a stop band, a sensing circuit in communication with the tunable notch filter and adapted to determine a phase change between a reference signal and a signal reflected from the tunable notch filter, and a control loop in communication with the tunable notch filter and the sensing circuit, the control loop being operable to adjust the tunable notch filter to modify the phase change.
Claims18
A tunable filter and control system, comprising:
- a tunable notch filter providing a stop band;
- a sensing circuit in communication with the tunable notch filter and adapted to determine a phase change between a reference signal and a signal reflected from the tunable notch filter;
- and
- a control loop in communication with the tunable notch filter and the sensing circuit, the control loop being operable to adjust the tunable notch filter to modify the phase change.
A method for rejecting a strongest signal on an input of a tunable filter and control system, the method comprising:
- receiving a reference signal at a tunable notch filter, wherein at least a portion of the reference signal is reflected by the tunable notch filter;
- sensing a phase change between the reference signal and the signal reflected from the tunable notch filter;
- and
- adjusting the tunable notch filter to modify the phase change.
Dependencies are inferred from the claim text.