Insulation of anti-resonance in resonators
AssigneeNational University of Singapore
InventorsYong Ping Xu, Wai Hoong Sun, Xiaofeng Wang, Zhe Wang, Sean Ian Saxon Liw
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Abstract
A cancellation circuit to remove the anti-resonance signal from a resonator. Micro-mechanical and surface and bulk acoustic wave resonators include an anti-resonance in an output signal. This has an undesirable effect on certain types of systems in their function and performance. An anti-resonance cancellation circuit removes the anti-resonance from the output of the resonators by providing a signal which is subtracted from the output of the resonator. The cancellation circuit includes a capacitor which is matched to the static capacitance of the resonator. The loads of the resonator and cancellation network are also matched.
Claims13
A resonator system, comprising:
- a resonator having an input connected to an input signal and an output;
- a cancellation network having an input connected to said input signal and having an output;
- and
- a subtractor having a positive input connected to the output of said resonator and a negative input connected to the output of said cancellation network and an output;
- wherein an anti-resonance is removed from the output of said resonator.
A method for cancelling an anti-resonance signal, comprising:
- providing a resonator having an input and an output;
- providing a cancellation circuit having an input connected to said resonator input and having an output;
- subtracting the signal at the output of said cancellation network from the signal at an output of said resonator circuit to produce a subtractor output, wherein the subtractor output contains a resonance signal from said resonator without an anti-resonance signal.
An anti-resonance cancellation circuit:
- an input for receiving an input signal;
- an output for producing an output signal;
- and
- a capacitor connected between said input and said output, whereby said output signal approximates an anti-resonance signal generated by a resonator.
Dependencies are inferred from the claim text.