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Showing 1 to 10 of 10 for “"Piezoelectric resonators"”.
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Frequency synthesis using MEMS piezoelectric resonators
(cont.) Ultimately, this thesis presents two approaches to frequency synthesizer design. The first uses frequency windows of approximately 200 MHz. The 800 MHz to 1 GHz matching network is presented in detail along with predicted performance capabilities across this frequency range. The second …
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Large-Signal Characterization of Piezoelectric Resonators for Power Conversion
… weight, and poor performance at small sizes. Piezoelectric devices, when operated in their inductive regime, can serve a purpose similar to that of magnetic components and offer favorable scaling properties as components are miniaturized. Several sources have demonstrated the viability of …
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Mems approaches in infrared imaging
… physically interfaced with different types of piezoelectric resonators, constructed using the MEMS process. The expansion due to heating, applies stress to the piezoelectric resonator material. This thermally induced stress forces the resonator to alter its physical frequency and produces a …
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A Two-Stage Piezoelectric Resonator and Switched Capacitor DC-DC Converter
… and instead design power converters based on piezoelectric resonators (PRs) and capacitors as the main passive elements. In previous work, we have demonstrated that PRs have high efficiencies and power density capabilities operating as dc-dc voltage regulators, but that these advantages wane …
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Design of width-extensional, piezoelectric RF MEMS resonators and filters
Existing width-extensional, piezoelectric resonators (LBARs) suffer from high motional resistance and susceptibility to manufacturing disorder. Attempts to lower motional resistance by connecting many LBARs electrically in parallel fail because such schemes are highly susceptible to the disorder …
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REALIZATION OF TEMPERATURE COMPENSATED ALUMINUM NITRIDE MICRORESONATOR FILTERS WITH BANDWIDTHS BEYOND kt2 LIMIT
… on temperature compensated aluminum nitride microresonators that have fractional bandwidths exceeding the microresonator coupling coefficient, kt2, limit of 0.3%. A method is presented that offers the flexibility of using low Q reactive components to couple temperature compensated aluminum nitride …
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High Frequency Thermally Actuated Single Crystalline Silicon Micromechanical Resonators with Piezoresistive Readout
… on developing high frequency micromechanical resonators. As the two most common and conventional MEMS resonators, piezoelectric and electrostatic resonators have been at the center of attention despite having some drawbacks. Piezoelectric resonators provide low impedances that make them …
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Closed Loop Control for a Piezoelectric-Resonator-Based DC-DC Power Converter
… and power dense when scaled to small sizes. Piezoelectric resonators (PRs), which store energy in mechanical inertia and compliance, are promising alternatives to magnetic energy storage for miniaturized power electronics because of their high quality factors and favorable scaling properties. …
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Analysis and Compensation of Imperfection Effects in Piezoelectric Vibratory Gyroscopes
… that occur during manufacture of the resonators. The effects of resonator imperfections, in piezoelectric vibratory gyroscopes, were studied. Hamilton's principle and the Rayleigh-Ritz method provided an effective approach for modeling the coupled electromechanical dynamics of …
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Thermal nonlinearity in radio frequency piezoelectric laterally vibrating resonators
Made available in DSpace on 2017-08-10T19:16:14Z (GMT). No. of bitstreams: 2 LU-THESIS-2017.pdf: 5134611 bytes, checksum: 3b05e47a1c68b4bc9eb2973a7e4ae2cb (MD5) LICENSE.txt: 4207 bytes, checksum: a0a71b79182cbf402ee538e2881f18eb (MD5) Previous issue date: 2017-04-27