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Mass sensing has so far rather developed along the resolution axis, reaching atomic-scale detection, than into the direction of high speed. This letter reports on a novel self-calibrating technique that makes high-speed inertial mass sensors capable of instant high-resolution detection and weighing. The sensing nanoelectromechanical resonator is embedded into a phase-locked loop and the sensor-inherent...
To foster the advent of miniaturized, self-controlled and highly sensitive nanoelectromechanical systems, a model for electromechanical resonator operation under the control of an adaptative phase locked loop is presented. The implications of limited observability, due to detectability thresholds and noise, on start-up and oscillation stability are analysed. Minimum system requirements, necessary...
A closed-loop oscillator topology is proposed for dynamic sensor operation of nanoelectromechanical systems, benefiting from the structure's quality factor. Automatic adaptation to diverse sensors' properties is achieved via a self-regulating phase-locked loop, making the topology widely usable. A low-noise programmable harmonic LC oscillator forms the cornerstone of its design. Integrated in a 180...
To foster the development of highly sensitive carbon nanotube nanoelectromechanical sensor systems, a computationally light analytical and semi-empirical model for the latter's dynamics, electromechanical and piezoresistive properties is presented. This model is the breeding ground for the subsequent design and implementation of a phase locked loop and feedback circuitry, which form an adaptive closed-loop...
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