Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Variable capacitors"”.
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Optimization studies of thermal bimorph cantilevers, electrostatic torsion actuators and variable capacitors
… electrostatic torsion actuators, and variable capacitors. Calculation, simulation, and experimental data are used to confirm the device behavior and demonstrate the application of the design approaches. For thermal bimorph cantilevers, an analytical model is presented which allows …
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Design, Fabrication, and Characterization of an Array of Graphene Based Variable Capacitors
… create an array of freestanding graphene-based variable capacitors on 100 mm silicon wafer substrates. Our intent is to develop a device that can be highly duplicated and potentially incorporated into an integrated circuit to power low power electronics. </p> <p>This work is based on a two-mask …
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Surface micromachined MEMS variable capacitor with two-cavity for energy harvesting
In this research, a novel MEMS variable capacitor with two capacitive cavities for energy harvesting was developed that use the wasted energy associated with undesirable mechanical vibrations to power microelectronic sensors and actuators widely found in structures and systems surrounding us. The …
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Frequency synthesis using MEMS piezoelectric resonators
… second design implements matching networks with variable capacitors and a variable load impedance. CAD performance simulations validate the broadband switched array design concept, and represent a first step towards realizing a new, commercially viable RF MEMS oscillator and switched array …
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A variable capacitor made from single crystal silicon fracture surface pairs
… optimized to apply pure tension. Prototype MEMS variable capacitors employing fracture surfaces as separable parallel plates have been developed. The advantage of fracture surfaces over etched surfaces is their exceptional flatness or complementarity, which allow them to very closely approach …
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Vibration-to-electric energy conversion using a mechanically-varied capacitor
… energy harvesting has focused on the use of variable capacitors, magnets, or piezoelectric materials as the basis of energy transduction. How- ever, few of these studies have explored the detailed circuits required to make the energy harvesting work. In contrast, this thesis develops and …
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Load-Independent Class-E Power Conversion
… over 20:1 output power range. Design of variable Capacitor by connecting two voltage-sensitive capacitors in series and controlling the bias voltage of them - The equivalent varying capacitance in the Class-E dc-dc converter can be compensated in the whole load range only with variable …