Apparatuses and methods for tuning center frequencies
| DWPI Title: Method for tuning acoustic wave resonator to implement electrical frequency control applications, involves applying input signal to input port connected to input group and obtaining output signal from output port connected to output group |
| Abstract: Apparatuses and methods for tuning center frequencies are described herein. Examples of tuning described herein including tuning using feedback from the resonator. Variable gain feedback for tuning of acoustic wave resonators is provided in some examples. An example apparatus may include a resonator and a feedback loop. The resonator may be configured to receive a tuning signal and to provide a feedback signal. The feedback signal may be based on the tuning signal. The feedback loop may be configured to receive the feedback signal from the resonator. The feedback loop further may be configured to provide the tuning signal to actively tune a center frequency of the resonator. The tuning signal may be based on the feedback signal. |
| Use: Method for tuning an acoustic wave resonator to implement electrical frequency control applications. |
| Advantage: The method enables allowing inherent capacitance of the resonator to achieve maximum capacitance between each upper electrode and a lower electrode, thus achieving a tuning range of the resonator without adding capacitive or other loads to the upper electrodes. The method enables adjusting magnitude of the tuning signal to adjust tuning capacitance provided to the resonator. The method enables driving the upper electrodes in an efficient manner, so that impacts of shunt capacitances on the tuning capacitance can be reduced or eliminated by supplying gain using active components. |
| Novelty: The method involves applying a control signal to a variable gain amplifier (235) for tuning a acoustic wave resonator (100), where amplification of a phase-shifted feedback signal is performed in the amplifier in response to the control signal, a tuning signal is returned to transducer electrodes with a phase shift, feedback signal is received in a feedback loop from a feedback group, and the tuning signal is returned to a tuning group. An input signal is applied to an input port connected to an input group. An output signal is obtained from an output port connected to an output group. |
| Filed: 10/11/2013 |
| Application Number: US14051818A |
| Tech ID: SD 11585.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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