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 20 of 44 for “"figure-of-merit (FOM)"”.
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Super-high-frequency lithium niobate microelectromechanical system resonators
Recently, the rapid growth of super-high-frequency (SHF) applications has fueled the development of wideband filters and multiplexers. To achieve the desired performance, the building blocks of these filters, namely the acoustic resonators, must feature resonances at SHF, and high figure of merit …
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ALN/ALSCN Acoustic Resonant Systems Based on Ultra-Thin Piezoelectric Films
The objective of this thesis is to introduce several advances into ultra-thin aluminum nitride/aluminum scandium nitride (AlN/AlScN) based acoustic resonant systems. Various microelectromechanical system (MEMS) acoustic resonators — surface acoustic wave (SAW), thin-film bulk acoustic resonator …
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Design of a low power switched-capacitor pipeline analog-to-digital converter
… signal-to-noise- and-distortion-ratio (SNDR) of 47 dB. This SNDR translates to a figure of merit (FOM) of 2.6N/conversion-step with a 1.2 V power supply.</p>
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Studies on Real-Valued Negative Selection Algorithms for Self-Nonself Discrimination
… system (AIS) is an emerging research field of computational intelligence that is inspired by the principle of biological immune systems. With the adaptive learning ability and a self-organization and robustness nature, the immunology based AIS algorithms have successfully been applied to …
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Successive-approximation-register based quantizer design for high-speed delta-sigma modulators
… modulator requires that all components of the delta-sigma loop operate at the desired high frequency. For this reason, it is essential that the quantizer used in the delta-sigma loop operate at a high sampling frequency. This thesis focuses on the design of high-speed time-interleaved …
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Cmos Design of an 8-Bit 1MS/S Successive Approximation Register ADC
<p>Rapid evolution of integrated circuit technologies has paved a way to develop smaller and energy efficient biomedical devices which has put stringent requirements on data acquisition systems. These implantable devices are compact and have a very small footprint. Once implanted these devices need …
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Simulating an Optical Neural Network for Deep Learning in Edge Computing
… DNNs require a GPU or data center to run, both of which are too large to fit onto edge devices. Here, an optical neural network (ONN) accelerator called netcast is simulated on two real-world machine vision applications: MNIST digit classification and scene recognition. The netcast ONN enables …
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Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces
… These constraints have led to the use of Novec fluids and fluroinerts as coolants. Although these fluids are chemically stable and have low dielectric constants, they are plagued by poor thermal properties. These factors necessitate the development of new heat transfer fluids with …
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Investigations on Multiscale Fractal-textured Superhydrophobic and Solar Selective Coatings
… and etching lead to the creation of random roughness at multiple length scales on the surface. The first part of thesis work aims at developing a fundamental mathematical understanding of multiscale coatings by presenting a fractal model to describe wettability on such surfaces. …
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Unconventional Swept Rotor Design using Open Vehicle Sketch Pad (OpenVSP)
Rotors are a crucial component of VTOL(vertical take-off and landing) devices like unmanned aerial vehicles (UAVs) or helicopters, etc., By generating a rotational force, they create the necessary thrust to lift and maneuver the vehicle in the air. In recent years, there has been a growing emphasis …
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Compact Femtosecond Lasers for Multiphoton Imaging
Multiphoton imaging currently is one of the main development directions in Laser Scanning Microscopy. A simplified way to assess suitability of a given laser for MPI applications is a figure of merit (FOM) approach based on peak power and average power of the particular excitation laser used. The …
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Modelling of Multichannel GaN Transistors
… bandgap semiconductor device. It has been one of the most promising research topics due to its excellent electronic properties in high power, high frequency and high temperature applications. The specific properties of GaN material make the devices have a wide range of potential applications. …
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A hardware platform to test analog-to-information conversion and non-uniform sampling
… ADCs, in the sense that the higher the bandwidth of a signal, the faster the ADC must be by a factor of at least 2. This in turn translates into higher power consumption. The problem can be mitigated to a certain extent by the use of zero-crossing based ADCs which consume much less power than …
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Design and Additive Manufacturing of Carbon-Fiber Reinforced Polymer Microlattice with High Stiffness and High Damping
… and high strength-to-weight ratios and hence are of great interest in several engineering fields such as aerospace, automotive and defense. However, despite their light weight, high stiffness and high strength, their application in these fields is limited due to their poor energy dissipation and …
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High-efficiency Waveguide Tunable Leaky-wave Antennas and Phase-shifters
… that one can increase the radiation efficiency of leaky-wave beam-steerable antennas. In this effort, both frequency and fixed frequency scanned leaky-wave antennas are considered. Specifically, we discuss the design and implementation of a slow-wave frequency-scanned leaky-wave antenna that can …
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Methods for optimization of the signature-based radiation scanning approach for detection of nitrogen-rich explosives
… rapidly detect nitrogen-rich explosives at standoff distances. This technique uses a template-matching procedure that produces a figure-of-merit (FOM) whose value is used to distinguish between inert and explosive materials. The present study develops a tiered-filter implementation of the …
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Spectrum monitor for cognitive radio
The concept of a cognitive radio assumes that the receiver is able to determine the activity level across a large range of spectrum in order to assign a channel for its use. Hence a key function is a spectrum monitor to detect the spectrum availability as a first step. This thesis explores the …
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Full-vectorial study of light and sound interactions in low and high index contrast silica waveguides
… been developed to find accurate modal solutions of acoustic modes in Ge-doped and un-doped planar silica waveguides. The structural symmetry is exploited and Aitken’s extrapolation is also used to improve the accuracy of the solutions. The spatial dependences of the dominant and non-dominant …
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Amplifier and data converter techniques for low power sensor interfaces
… interfaces circuits are integral components of wireless sensor nodes, and improvements to their energy-efficiency help enable long-term medical and industrial monitoring applications. This thesis explores both analog and algorithmic energy-saving techniques in the sensor interface signal …
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Iron Garnet Thin Films for Integrated Photonics and Spintronics
In pursuit of beyond CMOS computing, this thesis aims to provide material solutions for both photonic interconnects and ultra-fast spintronic memory. Iron garnet thin films are uniquely suited for both applications as they have: 1) strong magneto-optic (MO) response and low optical absorption at …
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