Index Catalog // ScholarsArchive@OSU

A DC-DC converter architecture for low-power, high-resistance thermoelectric generators for use in body-powered designs

Creator:: Miller, Brian A.
Abstract:: This thesis presents a low power DC-DC converter suitable for harvesting energy from high impedance thermoelectric generators (TEGs) for the use in body powered electronics. The chip has been fabricated in a 130nm CMOS technology. To meet the power demands of body powered networks, a novel dual-path architecture capable of...
Resource Type:: Masters Thesis

Development of acoustic transducers for use in the parametric pumping of spin waves

Creator:: Gross, Jonah M.
Abstract:: The work detailed here is the development of simulations and fabrication techniques used for the construction of thin-film acoustic transducers for use in the parametric pumping of spin waves. The Mason Model, a 1-D equivalent circuit simulating the responses of multilayer acoustic transducers, is implemented using ABCD-parameters in MATLAB to...
Resource Type:: Masters Thesis

Semi-digital PLL architecture for ultra low bandwidth applications

Creator:: George, Edmond
Abstract:: Phase Locked Loops(PLLs) are an integral part of almost every electronic system. Systems involving low frequency clocks often require PLLs with low bandwidth. The area occupied by the large loop filter capacitor and resistor in a low bandwidth PLL design makes the realization of traditional charge-pump PLL architecture impractical on...
Resource Type:: Masters Thesis

Analysis of Penetration and Reserve Requirements when Incorporating Renewable Energy Power Generation in the Bonneville Power Administration Balancing Authority Area

Creator:: Harpool, Scott E.
Abstract:: Interest in renewable energy is on the rise, in both grid-connected operations and research projects. Major types of renewable energy include: wind, solar, wave, tidal, biomass, and geothermal. The majority are variable, non-dispatchable sources, which can have a negative impact on reserve requirements. This study focused on determining the optimal...
Resource Type:: Honors College Thesis

Low power receivers for wireless sensor networks

Creator:: Ni, Ronghua
Abstract:: Wireless sensor networks are becoming important in several monitoring and sensing applications. Ultra low power consumption in the sensor nodes is important for extending the battery life of the nodes. In this dissertation, two low power BFSK receiver architectures are proposed and verified with prototype implementations in silicion. A 2.4...
Resource Type:: Dissertation

Passive health monitoring with wirelessly powered medical devices

Creator:: House, Samuel
Abstract:: The proliferation of body worn autometric devices has been enabled by advances in low-power electronics and fueled by the quantified-self movement. These devices range in complexity from pedometers to clinical vital sign measurement. They all share the same drawback, typically the most expensive and heaviest component, the battery. The future...
Resource Type:: Masters Thesis

Pattern discovery in noisy images

Creator:: Dhamodaran, Sharath Kumar
Abstract:: The Focused Ion Beam (FIB) tool is a versatile instrument for nano-machining in circuit editing. Circuit editing is one of the most important steps in the design of an electronic circuit on a chip. Circuit editing can be improved by imaging of silicon plates and analyzing the resultant images. However...
Resource Type:: Masters Thesis

Linearizing techniques for voltage controlled oscillator based analog to digital converters

Creator:: Rao, Sachin B.
Abstract:: Voltage controlled oscillator (VCO) based ADC is an important class of time-domain ADC that has gained widespread acceptance due to their several desirable properties. VCO-based ADCs behave like an open-loop continuous time ΔΣ modulator and achieve excellent resolution by first order noise shaping the quantization error. However, the SNDR of...
Resource Type:: Dissertation

Fast queuing policies via convex relaxation

Creator:: Nguyen-Huu, Duong
Abstract:: Traditionally, networking protocol designs have placed much emphasis on point-to-point reliability and efficiency. With the recent rise of mobile and multimedia applications, other considerations such as power consumption and/or Quality of Service (QoS) are becoming increasingly important factors in designing network protocols. As such, we present a new flexible framework...
Resource Type:: Masters Thesis

Modeling and analysis of spur structure of digital-to-time conversion based frequency synthesizers

Creator:: Talwalkar, Sumit A.
Abstract:: Frequency synthesizers are critical components of all communication systems. This thesis considers the issue of undesirable frequency spurs of a relatively recent type of frequency synthesis architecture called digital-to-time conversion (DTC). The DTC-based frequency synthesis architecture has important performance benefits over older frequency synthesizers, such as fast frequency switching, large...
Resource Type:: Dissertation

Testing of wave energy converters using the Ocean Sentinel Instrumentation Buoy

Creator:: Lettenmaier, Terrance
Abstract:: Ocean testing of Wave Energy Converter (WEC) prototypes is necessary to facilitate commercial WEC development. The Ocean Sentinel Instrumentation Buoy, completed in August 2012, provides a stand-alone load for WEC prototypes during ocean testing. The first part of this work was to develop the power conversion and data acquisition equipment...
Resource Type:: Dissertation

The Research and Development of a Multi-Resolution Geometry Modeler

Creator:: Lee, Anthony K.
Abstract:: With each generation of technology, computers become even more capable of rendering objects with an ever increasing number of polygons. As a result, the desire to add more details to a 3D model increases as well. Among the many tools provided by computer graphics software that an artist has at...
Resource Type:: Honors College Thesis

Development of a grid-scale energy storage solution via demand response using model predictive control of multiple residential water heaters

Creator:: Halamay, Douglas A.
Abstract:: As the growth of renewable energy sources, such as wind, solar, and ocean wave, increases, their impact on the electrical grid has been rapidly escalating. Although renewable resources have been able to offset some traditional generation, they have also brought a need for increasing reserve capacity due to their non-dispatchable,...
Resource Type:: Dissertation

Design and FPGA implementation of digital transmission over severe ISI channels

Creator:: Zhao, Yichen
Abstract:: Inter-symbol interference is one of the major factors that make the realization of high-data-rate digital communications system complex. Current designs face two main challenges: how to efficiently utilize the available bandwidth and how to reduce the hardware complexity of the transmitter and receiver. Traditional solutions use a single-band architecture. When...
Resource Type:: Masters Thesis

Power efficient analog-to-digital converters using both voltage and time domain information

Creator:: Oh, Taehwan
Abstract:: As advanced wired and wireless communication systems attempt to achieve higher performance, the demand for high resolution and wide signal bandwidth in their associated ADCs is strongly increased. Recently, time-domain quantization has drawn attention from its scalability in deep submicron CMOS processes. Furthermore, there are several interesting aspects of time-domain...
Resource Type:: Dissertation

Flexible dual TCP/UDP streaming for H.264 HD video over WLANs

Creator:: Zhao, Jing
Abstract:: High Definition video streaming over WLANs faces many challenges because video data requires not only data integrity but also frames have strict playout deadline. Traditional streaming methods that rely solely on either UDP or TCP have difficulties meeting both requirements because UDP incurs packet loss while TCP incurs delay. This...
Resource Type:: Masters Thesis

Time-based noise-shaping techniques for time-to-digital and analog-to-digital converters

Creator:: Young, Brian LeRoy
Abstract:: In this dissertation, time-based signal processing techniques and their applications in oversampling and noise-shaping data converters are examined. These techniques demonstrate the ability to shift the burden of high performance analog circuits from the compressed voltage-domain to the augmented time-domain. First, the potential of high order noise-shaping and phase-domain feedback...
Resource Type:: Dissertation

Design techniques for time based data converters

Creator:: Gande, Manideep
Abstract:: Modern day CMOS processes are characterized by voltage scaling and geometry scaling. Geometry scaling helps reduce gate delays, thereby aiding in the design of data converters which use time based processing. Another artifact of geometry scaling is the increase in complexity of digital circuitry available on traditional analog ICs, as...
Resource Type:: Dissertation

Design techniques for low-power multi-GS/s analog-to-digital converters

Creator:: Jiang, Tao
Abstract:: Ultra-high-speed (>10GS/s), medium-resolution (5~6bit), low-power (<50mW) analog-to-digital converter can find it application in the areas of digital oscilloscopes and next-generation serial link receivers. There are several challenges to enable a successful design, however. First, the time-interleaved architecture is required in order to achieve over 10GS/s sampling rate, with the trade-off...
Resource Type:: Dissertation

Adiabatic Markov Decision Process : convergence of value iteration algorithm

Creator:: Duong, Thai
Abstract:: Markov Decision Process (MDP) is a well-known framework for devising the optimal decision making strategies under uncertainty. Typically, the decision maker assumes a stationary environment which is characterized by a time-invariant transition probability matrix. However, in many real-world scenarios, this assumption is not justified, thus the optimal strategy might not...
Resource Type:: Masters Thesis

Security protocols for linear network coding

Creator:: Adeli, Majid
Abstract:: Network coding, as the next generation of data routing protocols, enables each intermediate node in a network to process and encode its received data before forwarding it to the next nodes. Hence, the core idea in network coding is to allow a network to encode the data that is being...
Resource Type:: Dissertation

Investigation of metal-insulator-metal (MIM) and nanolaminate barrier MIIM tunnel devices fabricated via atomic layer deposition

Creator:: Alimardani, Nasir
Abstract:: Metal-insulator-metal (MIM) tunnel devices have been proposed for high speed applications such as hot electron transistors, IR detectors, optical rectennas for IR energy harvesting, and backplanes for LCDs. The majority of these applications require highly asymmetric and non-linear current versus voltage (I-V) behavior at low applied voltages and ultra-high frequencies....
Resource Type:: Dissertation

Energy efficient communication across on-chip wires in digital CMOS

Creator:: Postman, Jacob
Abstract:: For the past half century, CMOS process scaling has followed Moore's law, approximately doubling transistor density every 18 months. While locally routed wires have generally scaled with transistor size, longer wires have scaled at a slower rate and in some cases have grown larger as chip size and complexity have...
Resource Type:: Dissertation

Atomic solid state energy scale applied to novel thin-film solar absorbers

Creator:: Pelatt, Brian D.
Abstract:: The atomic solid state energy (SSE) scale is introduced as a tool for inorganic materials design. The SSE scale is obtained by assessing an average electron affinity (EA) (for a cation) or an average ionization potential (IP) (for an anion) for each atom using data from compounds having that specific...
Resource Type:: Dissertation

Rapid bidirectional power flow of supercapacitor bank energy storage through grid-tied inverters for improved renewables integration

Creator:: Bostrom, Arne
Abstract:: The variable output of renewables such as wind and solar causes fluctuations of power flow that can adversely affect power system operation, especially at high levels of penetration. The coordination of multiple energy storage solutions can mitigate integration challenges by providing a buffer from variable renewables. This thesis presents the...
Resource Type:: Masters Thesis

A methodology to reduce the strain on hydro turbines using advanced life extending control of multiple energy storage systems

Creator:: Brosig, Sean G.
Abstract:: Over the last 20 years, there has been rapid growth in the amount of installed wind power in the Pacific Northwest, specifically in the Columbia River Gorge. The variable and non-dispatchable nature of this resource requires that it be balanced in some form by other sources on the grid. In...
Resource Type:: Masters Thesis

Design and modeling of low-power register file memories

Creator:: Donkoh, Eric Kwesi
Abstract:: With the evolving popularity of new computing platforms such as Ultrabooks, Tablets, and Smart Phones, and the shift to multi-core computing, power is now the key performance limiter, a departure from the traditional frequency limitation. As such, increasingly low-power design solutions feature prominently in early architectural and design space exploration...
Resource Type:: Dissertation

A motor-generator and supercapacitor based system for microgrid frequency stabilization

Creator:: Crispo, Richard F.
Abstract:: This research introduces an energy storage system to deliver microgrid frequency response. A doubly-fed induction generator (DFIG) and a squirrel cage induction machine (SCIM) are coupled together as a motor/generator set to deliver an immediate inertial response to a change of frequency, and an inverter and supercapacitors deliver short term...
Resource Type:: Masters Thesis

Hardware and software methods to improve and accelerate the development cycle of wave energy converters

Creator:: Tavakoli, Mike
Abstract:: With the ever-increasing demand and competition for global energy resources among nations, it is essential to explore and tap into various energy sources to reduce dependency on global markets. Renewable energy sources offer a significant opportunity to create localized and stable energy supplies. Ocean wave energy can be a promising...
Resource Type:: Masters Thesis

Design techniques for low power high speed successive approximation analog-to-digital converters

Creator:: Lin, Jiaming
Abstract:: This dissertation presents two high-speed pipeline successive approximation analog-to-digital converters (SAR ADCs). Capacitive DACs and resistive DACs are utilized in these two pipeline SAR ADCs, respectively. The pipeline SAR ADC with capacitive DACs can save 50% switching power compared with other time-interleaved SAR ADCs since the total capacitance of the...
Resource Type:: Dissertation

On the design, modeling, and testing of ocean wave energy converters

Creator:: Bosma, Bret
Abstract:: Ocean wave energy converter technology continues to advance and new developers continue to emerge, leading to the need for a general design, modeling, and testing methodology. This work presents a development of the process of taking a wave energy converter from a concept to the prototype stage. A two body...
Resource Type:: Dissertation

A frequency-domain approach to simulating wave energy converter hydrodynamics

Creator:: Simmons, Asher
Abstract:: Wave energy converter (WEC) devices are complicated systems containing hydrodynamic, mechanical, and electrical elements. WEC design efforts are primarily focused in the time-domain, using frequency-based energy analyses and numerical problem solving approaches that are staples in hydrodynamic design efforts to form the basic information set used in these time-domain development...
Resource Type:: Masters Thesis

Designing bulk acoustic wave resonators for parametric amplification of spin waves

Creator:: Chowdhury, Pratim
Abstract:: Spintronics is an emerging field of research dealing with devices that can potentially exploit the additional degree of freedom provided by the electron spin along with or instead of the conventional electronic charge. One of the most promising aspects of spintronics is the potential use of magnetostatic spin waves as...
Resource Type:: Masters Thesis

Adaptive broadband wireless interference mitigation architecture applying higher order statistics algorithm for computer platform

Creator:: Wang, Qiwei
Abstract:: The broadband wireless interference in a computer platform is resulted by multiple electro-magnetic emission sources. This non-Gaussian interference is proved to be double-sided K-distributed in previous research. With the limitation of transmission power and dimension of the device, interference mitigation is an efficient way to improve received signal bit error...
Resource Type:: Masters Thesis

Micropower incremental analog-to-digital converters

Creator:: Chen, Chia-Hung
Abstract:: Incremental ADCs (IADCs) have many advantages for low-frequency high-accuracy data conversion—they are easy to multiplex between channels, need simpler digital decimation filter, and allow extended counting with a Nyquist-rate ADC. A single-loop incremental ADC was designed and fabricated in 90 nm for a biosensor interface circuit. It incorporates one integrator,...
Resource Type:: Dissertation

Energy-efficient routing for delay-constrained data traffic in linear wireless sensor networks

Creator:: Alesaimi, Hani
Abstract:: Linear wireless sensor networks (LWSN) are special class of wireless sensor networks where sensor nodes are deployed in a straight line. Monitoring industrial pipelines, railroads, tunnels, power lines, and borders are applications of LWSNs. Wireless sensors are tiny devices with limited energy resources; therefore, efficient energy routing in LWSNs is...
Resource Type:: Masters Thesis

Fabrication of a flexible glucose sensing catheter for human implantation

Creator:: Matthews, David J.
Abstract:: Flexible electronics processing techniques were applied to integrate a glucose sensor with a hormone-delivery catheter in order to create a cheap and minimally invasive method for patients with type 1 diabetes to continually monitor and control their blood sugar levels. Ultimately, this work intends to move toward the development of...
Resource Type:: Masters Thesis

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