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Electrical engineering

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Silicon Compilation And Test For Dataflow Implementations In Gasp And Click, Swetha Mettala Gilla Jan 2018

Silicon Compilation And Test For Dataflow Implementations In Gasp And Click, Swetha Mettala Gilla

Dissertations and Theses

Many modern computer systems are distributed over space. Well-known examples are the Internet of Things and IBM's TrueNorth for deep learning applications. At the Asynchronous Research Center (ARC) at Portland State University we build distributed hardware systems using self-timed computation and delay-insensitive communication. Where appropriate, self-timed hardware operations can reduce average and peak power, energy, latency, and electromagnetic interference. Alternatively, self-timed operations can increase throughput, tolerance to delay variations, scalability, and manufacturability.

The design of complex hardware systems requires design automation and support for test, debug, and product characterization.

This thesis focuses on design compilation and test support for ...


Analysis, Modeling And Control Of Stacked Dc-Ac Converters, Prasanta Kumar Achanta Jan 2018

Analysis, Modeling And Control Of Stacked Dc-Ac Converters, Prasanta Kumar Achanta

Electrical, Computer & Energy Engineering Graduate Theses & Dissertations

Stacked DC-AC converters offer several unique advantages including i) the ability to create power systems with voltage level specifications many orders above the device voltage ratings, ii) flexibility in system design, and iii) modularity for system expansion. The benefits of stacked DC-AC system can be further extended by making the converters bi-directional using circuit design and control techniques. This thesis identifies and analyses the challenges that come along with the advantages of stacked DC-AC systems. These challenges are then addressed by introducing circuit architectures and control techniques. Simple, yet powerful models are presented to understand the overall system operation.

Unlike ...


Cross Calibration And Validation Of Landsat 8 Oli And Sentinel 2a Msi, M. M. Farhad Jan 2018

Cross Calibration And Validation Of Landsat 8 Oli And Sentinel 2a Msi, M. M. Farhad

Electronic Theses and Dissertations

This work describes a proposed radiometric cross calibration between the Landsat 8 Operational Land Imager (OLI) and Sentinel 2A Multispectral Instrument (MSI) sensors. The cross calibration procedure involves i) correction of the MSI data to account for spectral band differences with the OLI; and ii) correction of BRDF effects in the data from both sensors using a new model accounting for the view zenith/azimuth angles in addition to the solar zenith/view angles. Following application of the spectral and BRDF corrections, standard least-squares linear regression is used to determine the cross calibration gain and offset in each band. Uncertainties ...


Physical Unclonable Function Reliability On Reconfigurable Hardware And Reliability Degradation With Temperature And Supply Voltage Variations, Manpreet Kaur Jan 2018

Physical Unclonable Function Reliability On Reconfigurable Hardware And Reliability Degradation With Temperature And Supply Voltage Variations, Manpreet Kaur

Electronic Theses and Dissertations

A hardware security solution using a Physical Unclonable Function (PUF) is a promising approach to ensure security for physical systems. PUF utilizes the inherent instance-specific parameters of physical objects and it is evaluated based on the performance parameters such as uniqueness, reliability, randomness, and tamper evidence of the Challenge and Response Pairs (CRPs). These performance parameters are affected by operating conditions such as temperature and supply voltage variations. In addition, PUF implementation on Field Programmable Gate Array (FPGA) platform is proven to be more complicated than PUF implementation on Application-Specific Integrated Circuit (ASIC) technologies. The automatic placement and routing of ...


Voltage Controller For Simulating Transition Between Boost –Buck -Boost Converter, Aula Jameel Al-Kamil Aug 2017

Voltage Controller For Simulating Transition Between Boost –Buck -Boost Converter, Aula Jameel Al-Kamil

Master's Theses

In the present work, a voltage tracking controller is developed for DC-DC Buck-Boost converter using software model. The software developed can track the voltage and the mode of operation (Buck or Boost), which depends on the value of the duty cycle ratio (D). The error between 𝑉𝑜𝑟𝑒𝑓(reference voltage) and output voltage is minimized by using step input as reference. The simulation results show that the designed software controller can successfully track the voltage with low error and with short settling time. The values for the Buck-Boost circuit components, the capacitor and the inductor, are tuned and selected so ...


Solid State Drive, Shaun A. Steele Jun 2017

Solid State Drive, Shaun A. Steele

Electrical Engineering

This project documents the design and implementation of a solid state drive (SSD). SSDs are a non-volatile memory storage device that competes with hard disk drives. SSDs rely on flash memory, a type of non-volatile memory that is electrically erased and programmed. The appeal of SSDs lies in the fact that they allow a fast, reliable, and durable memory storage device. The goal of this project is to have a working external SSD built from scratch.


Development Of An Oxygen Saturation Monitoring System By Embedded Electronics, Manikandan Venkatesan Gomathy May 2017

Development Of An Oxygen Saturation Monitoring System By Embedded Electronics, Manikandan Venkatesan Gomathy

Theses and Dissertations

Measuring Oxygenation of blood (SaO2) plays a vital role in patient’s health monitoring. This is often measured by pulse oximeter, which is standard measure during anesthesia, asthma, operative and post-operative recoveries. Despite all, monitoring Oxygen level is necessary for infants with respiratory problems, old people, and pregnant women and in other critical situations.

This paper discusses the process of calculating the level of oxygen in blood and heart-rate detection using a non-invasive photo plethysmography also called as pulsoximeter using the MSP430FG437 microcontroller (MCU). The probe uses infrared lights to measure and should be in physical contact with any peripheral ...


Design And Demonstration Of A Physical, Multi-Agent Autonomous Controller Testbed, Eric A. Nees Jan 2017

Design And Demonstration Of A Physical, Multi-Agent Autonomous Controller Testbed, Eric A. Nees

Browse all Theses and Dissertations

Navigation and control algorithms are often tested in a simulated environment before being deployed in physical systems. Although simulated environments provide a controlled setting to carefully evaluate performance, the designed scenarios are sometimes unrealistically ideal and may unintentionally omit circumstances or unmodeled interactions. This thesis presents the design, implementation, and practical demonstration of a physical testbed that enables the testing of multi-agent autonomous strategies in hardware on a small scale. Testing the algorithms at scale allows real-time exploration of the interaction and performance of both human and autonomous algorithms under non-ideal conditions while avoiding the costs and risks of full-scale ...


Design Of An 8-Bit Successive Approximation Pipelined Analog To Digital Converter (Sap-Adc) In 90 Nm Cmos, Vivek Kotti Jan 2017

Design Of An 8-Bit Successive Approximation Pipelined Analog To Digital Converter (Sap-Adc) In 90 Nm Cmos, Vivek Kotti

Browse all Theses and Dissertations

Analog to Digital Converters bridge the gap between physical world and digital signal processing. Most times analog signals received from the real world needs to be amplified and converted to digital to impart various signal enhancements to the received signal. The digital signal is much suitable to operate on with less noise and well defined logic levels when compared to continuously varying analog signal. Communication systems demand ever-increasing bandwidth which unfortunately has been a huge limitation for present day ADCs. Hence, an architecture which combines the accuracy of a SAR -ADC with the concept of pipelining to increase the bandwidth ...


A 13t Single-Ended Low Power Sram Using Schmitt-Trigger And Write-Assist, Praneeth Namala Jan 2017

A 13t Single-Ended Low Power Sram Using Schmitt-Trigger And Write-Assist, Praneeth Namala

Browse all Theses and Dissertations

SRAMs are widely used in application based systems like medical instruments, portable electronic devices from caches to registers. Technology scaling of transistor into nanometer regime has substantially increased memory density that occupies large silicon area in today's IC's and consumes significant amount of active and leakage power. So, design requirements and challenges such as memory write and read speed, leakage power, noise margin and process-voltage-temperature (PVT) variations also significantly increase. In this thesis, a 13T single-ended low power SRAM using Schmitt-Trigger and write-assist technique is presented. It enhances read static noise margin, write-1 and read-0 access time, specifically ...


Effects Of The Kinematic Model On Forward-Model Based Spotlight Sar Ecm, David T. Pyles Jan 2017

Effects Of The Kinematic Model On Forward-Model Based Spotlight Sar Ecm, David T. Pyles

Browse all Theses and Dissertations

Spotlight synthetic aperture radar (SAR) provides a high-resolution remote image formation capability for airborne platforms. SAR image formation processes exploit the amplitude, time, and frequency shifts that occur in the transmitted waveform due to electromagnetic propagation and scattering. These shifts are predictable through the SAR forward model which is dependent on the waveform parameters and emitter flight path. The approach to develop an electronic countermeasure (ECM) system that is founded on the SAR forward model implies that the ECM system should alter the radar's waveform in a manner that produces the same amplitude, time, and frequency shifts that a ...


Layout Implementation Of A 10-Bit 1.2 Gs/S Digital-To-Analog Converter In 90nm Cmos, Vinay Kumar Chunchu Jan 2017

Layout Implementation Of A 10-Bit 1.2 Gs/S Digital-To-Analog Converter In 90nm Cmos, Vinay Kumar Chunchu

Browse all Theses and Dissertations

Digital-to-analog converters are the interface circuits between digital and analog domains. They are used in data communication applications and different sorts of applications where transformation amongst digital and analog signals is needed. High-speed data converters are needed to match the bandwidth demands of the present-day communication systems. This thesis presents the layout implementation of a 10-bit current steering DAC with a sampling rate of about 1.2 GS/s using CMOS 90 nm technology. Current steering DAC topology is used in high-speed applications. The DAC in this thesis is designed using a segmented architecture in which 4 LSB current cells ...


Conceptual Understanding Of Threshold Concepts Of Electrical Phenomena: Mental Models Of Senior Undergraduates In Electrical Engineering, Mark T. Carnes Dec 2016

Conceptual Understanding Of Threshold Concepts Of Electrical Phenomena: Mental Models Of Senior Undergraduates In Electrical Engineering, Mark T. Carnes

Open Access Dissertations

Every field of study has a set of domain-specific concepts that anyone who desires to work in that field must know and understand. Most students who pursue university degrees in engineering trust that their education is designed to provide them with this knowledge. But does it? In electrical engineering (EE), conceptual understanding of electrical phenomena has rarely been addressed. Even though the presumed goal of instructors and students alike is to learn the concepts of electrical phenomena well enough to be able to use the concepts to design useful things, it is difficult to determine whether this goal is being ...


Neurosim: Naturally Extensible, Unique Risc Operation Simulator, David Eric Mcneil May 2016

Neurosim: Naturally Extensible, Unique Risc Operation Simulator, David Eric Mcneil

Graduate Theses - Electrical and Computer Engineering

The NEUROSim framework consists of a compiler, assembler, and cycle-accurate processor simulator to facilitate computer architecture research. This framework provides a core instruction set common to many applications and a simulated datapath capable of executing these instructions. However, the core contribution of NEUROSim is its exible and extensible design allowing for the addition of instructions and architecture changes which target aspecic application. The NEUROSim framework is presented through the analysis of many system design decisions including execution forwarding, control change detection, FPU configuration, loop unrolling, recursive functions, self modifying code, branch predictors, and cache architectures. To demonstrate its exible nature ...


A Wavelet Transform Module For A Speech Recognition Virtual Machine, Euisung Kim Jan 2016

A Wavelet Transform Module For A Speech Recognition Virtual Machine, Euisung Kim

All Theses, Dissertations, and Other Capstone Projects

This work explores the trade-offs between time and frequency information during the feature extraction process of an automatic speech recognition (ASR) system using wavelet transform (WT) features instead of Mel-frequency cepstral coefficients (MFCCs) and the benefits of combining the WTs and the MFCCs as inputs to an ASR system. A virtual machine from the Speech Recognition Virtual Kitchen resource (www.speechkitchen.org) is used as the context for implementing a wavelet signal processing module in a speech recognition system. Contributions include a comparison of MFCCs and WT features on small and large vocabulary tasks, application of combined MFCC and WT ...


Hand Pattern Recognition Using Smart Band, Theerth Raj Munusamy May 2015

Hand Pattern Recognition Using Smart Band, Theerth Raj Munusamy

Theses and Dissertations

The Importance of gesture recognition has widely spread around the world. Many research strategies have been proposed to study and recognize gestures, especially facial and hand gestures. Distinguishing and recognizing hand gestures is vital in hotspot fields such as bionic parts, powered exoskeleton, diagnosing muscle disorders, etc. Recognizing such gesture patterns can also create a stress-free and fancy user interface for mobile phones, gaming consoles and other such devices.

The objective is to design a simple yet efficient wearable hand gesture recognizing system. This thesis also shows that by taking both EMG and accelerometer data into account, can improve the ...


Monitoring System For Electric Motors, Sean Waples Jan 2015

Monitoring System For Electric Motors, Sean Waples

Williams Honors College, Honors Research Projects

Induction motors are key to many applications and are one of the most commonly used electric devices. Currently, induction motor fault detection schemes are limited in features and computational power. With current technology, fault detection algorithms are operating in embedded systems and run on embedded processors. These processors do not have the computation power and functionality that more advanced computer systems have, which is the source of the issue. With the recent rise in cloud computing and connected devices, it is possible to build an induction motor monitoring system with a much greater set of features and possibilities.


High Speed Clock Glitching, Santosh Desiraju Jan 2015

High Speed Clock Glitching, Santosh Desiraju

ETD Archive

In recent times, hardware security has drawn a lot of interest in the research community. With physical proximity to the target devices, various fault injection hardware attack methods have been proposed and tested to alter their functionality and trigger behavior not intended by the design. There are various types of faults that can be injected depending on the parameters being used and the level at which the device is tampered with. The literature describes various fault models to inject faults in clock of the target but there are no publications on overclocking circuits for fault injection. The proposed method bridges ...


Wirelesseeg: Data Aquisition + Handheld Device, Michael Dylan Snowden, Madeline Threatt, Brent Mcferrin, David Platillero, Karsten Solies, Lindsey Hopf May 2014

Wirelesseeg: Data Aquisition + Handheld Device, Michael Dylan Snowden, Madeline Threatt, Brent Mcferrin, David Platillero, Karsten Solies, Lindsey Hopf

Chancellor’s Honors Program Projects

No abstract provided.


Single Electron Devices And Circuit Architectures: Modeling Techniques, Dynamic Characteristics, And Reliability Analysis, Ran Xiao Jan 2014

Single Electron Devices And Circuit Architectures: Modeling Techniques, Dynamic Characteristics, And Reliability Analysis, Ran Xiao

Electronic Theses and Dissertations

The Single Electron (SE) technology is an important approach to enabling further feature size reduction and circuit performance improvement. However, new methods are required for device modeling, circuit behavior description, and reliability analysis with this technology due to its unique operation mechanism. In this thesis, a new macro-model of SE turnstile is developed to describe its physical characteristics for large-scale circuit simulation and design. Based on this model, several novel circuit architectures are proposed and implemented to further demonstrate the advantages of SE technique. The dynamic behavior of SE circuits, which is different from their CMOS counterpart, is also investigated ...


Formula Electric : Powertrain, Mark Allison, Bryan Bidwell, Stuart Hopson, Jackson Smith, Carlos Streegan, Dominic Villa Jun 2013

Formula Electric : Powertrain, Mark Allison, Bryan Bidwell, Stuart Hopson, Jackson Smith, Carlos Streegan, Dominic Villa

Interdisciplinary Design Senior Theses

The Santa Clara Formula Electric team designed, and manufactured a powertrain for an electric racecar according to the rules prescribed by the SAE International Formula Electric competition. The powertrain is divided into subsystems: the battery pack, battery pack cooling system, motor controller, and the motor. The battery pack was constructed, but full electrical connection of all cells were not made. The pack was not integrated with the motor and motor controller. In addition, due to time constraints, extensive testing could not be completed.


Wireless Impact Detection System, Shawno Auwae, Kyle Terriere Jun 2013

Wireless Impact Detection System, Shawno Auwae, Kyle Terriere

Interdisciplinary Design Senior Theses

Recently, brain trauma caused by multiple concussions has become a pressing issue for contact sports, mainly American football players. The severity of the impacts in these sports have led to discussion concerning the standard safety equipment used, as well as the rules enforcing a certain style of play. Multiple studies have shown that concussions have damaging long-term effects, including dementia and memory loss. The dominant professional football organization, the National Football League (NFL), employs qualified athletic trainers to diagnose and treat players with concussions, but many incidents still go undetected. This problem is magnified at the youth level, where the ...


High Performance Rf Control Devices Using Capacitively Coupled Contacts (C3) Over Iii-N Heterostructures, Faisal Jahan Jan 2013

High Performance Rf Control Devices Using Capacitively Coupled Contacts (C3) Over Iii-N Heterostructures, Faisal Jahan

Theses and Dissertations

RF switches, power limiters and other control devices are essential components of modern RF systems. RF switches are important parts of wireless modules of various devices such as laptops, tablets, cell phones etc. and key components of satellites communication systems, radars, multi-band wireless and aerospace communications, phased array antennas. RF Power limiters (PL) are also important components of RF systems protecting linear amplifiers, detectors etc. from high-power stress. Traditionally, RF switches are fabricated using pin diodes or MEMS, Si MOSFETs or GaAs HEMTs. RF PLs are typically implemented using Schottky or pin-diodes. Traditional devices used in RF switch and PLs ...


Distributed Sensor Fault Diagnosis For Automated Highway Systems, Hui Chen Jan 2013

Distributed Sensor Fault Diagnosis For Automated Highway Systems, Hui Chen

Browse all Theses and Dissertations

Fault diagnosis problems for large-scale nonlinear systems have attracted significant attentions from researchers in recent years. Most fault detection and isolation (FDI) methods have been proposed based on a centralized architecture. However, due to the complexity of the system, most of these centralized fault detection and diagnosis schemes are not able to delivery effective fault detection and isolation performance for a large-scale nonlinear system, which contains subsystems interacting with neighboring subsystems.

In this thesis, a distributed fault detection and isolation method is developed for the automated highway systems (AHS). For each subsystem of AHS, a distributed fault detection and isolation ...


Ultrawideband (Uwb) And Reconfigurable Antennas - New Concepts For Conformal Load Bearing Antenna Structures (Clas), Nicholas Bishop Jan 2013

Ultrawideband (Uwb) And Reconfigurable Antennas - New Concepts For Conformal Load Bearing Antenna Structures (Clas), Nicholas Bishop

Theses and Dissertations

Conformal antennas have been increasingly playing an important role in a vast number wireless of communication applications. More specifically, Conformal Load Bearing Antenna Structures (CLAS) have drawn a great deal of interest among researchers and engineers because of their advantages of multiple functionality, e.g. antenna and structure both. The objectives of this thesis are to investigate and design innovative conformal Ultrawideband (UWB) endfire antenna arrays and reconfigurable aperture coupled pixel patch antennas both of which are good candidates for CLAS. First, a broadband VHF-UHF end-fire Yagi-Uda array is proposed for possible air vehicle integration and operation within the 240-465 ...


Iii-V Nitride Micro- And Nano-Scale Cantilevers For Multimodal Sensing Applications, Ehtesham Bin Quddus Jan 2013

Iii-V Nitride Micro- And Nano-Scale Cantilevers For Multimodal Sensing Applications, Ehtesham Bin Quddus

Theses and Dissertations

Recent research trends in chemical and biological sensing have been geared toward developing molecular sensor devices that are fast, label free, miniaturized and portable. The performance of these devices can be dramatically improved by utilizing multimodal detection techniques, new materials and micro-/nanofabrication technologies. This is especially true for micro-/nanoscale cantilever sensors, which undergo changes in mechanical or electrical properties upon the specific binding of molecules. To develop the sensor devices with the above attributes, we utilized III-V nitride materials: InN nanowires for realizing nanoscale cantilevers and AlGaN/GaN heterostuctures with or without embedded HFETs, for developing microcantilevers. There ...


Efficient Generation Of Power In Medium Voltage Direct Current Systems: Variable Speed Operation And Rectifier Considerations, Dan Li Jan 2013

Efficient Generation Of Power In Medium Voltage Direct Current Systems: Variable Speed Operation And Rectifier Considerations, Dan Li

Theses and Dissertations

By investigating variable speed operation of an engine and different types of ac-dc rectifier topologies, this dissertation provides procedures to develop and implement efficient Medium Voltage Direct Current (MVDC) power systems. The research reported here offered solutions to the following issues:

1) Efficiency improvement of a gas turbine by running it in variable speed operation mode.

2) The advantages and disadvantages of different ac-dc rectifier topologies considering both the efficiency and rectifier performance (dc bus voltage regulation, weight/size/volume of passive components, number of semi-conductor devices, displacement power factor, complexity of control strategy, etc.)

3) Implementation of variable speed ...


Passive Equalizer Topology Analysis For Signal Integrity Applications, Kuo-Lun Yen Jan 2013

Passive Equalizer Topology Analysis For Signal Integrity Applications, Kuo-Lun Yen

Theses and Dissertations

In high-speed, high density PCB bus systems, high frequency signal losses and crosstalk can have great impacts on signal integrity and digital timing, which can distort transmitted signals, worsen eye diagrams, and attenuate signal amplitudes. Also, these impacts make digital signals and their energy smearing over multiple bit positions as known as jitters, and cause the phenomenon of inter-symbol interference (ISI) in digital signal transmissions.

The main objective of this thesis is to analyze and develop efficient topology circuits for compensating bus system high frequency losses by using equalization techniques. The thesis has focused on study of various practical and ...


Optimal Design And Control Of Dc-Dc Resonant Converters For Wireless Power Transfer Applications, Isaac Nam Jan 2013

Optimal Design And Control Of Dc-Dc Resonant Converters For Wireless Power Transfer Applications, Isaac Nam

Theses and Dissertations

Wireless power transfer (WPT) technology provides galvanic isolation for improved safety and also provides reliability by eliminating the need for dedicated connectors/adapters that can get damaged due to frequent usage. For these reasons, it has become popular in medical implant charging and electric vehicle (EV) charging. Beyond these niche applications, due to aesthetic features and convenience provided by the cord-free environment, it is rapidly becoming an attractive charging solution for various portable electronics as well as household appliances. However, currently available WPT technology demonstrates several shortcomings and various challenges due to allowed receiver position variation with respect to transmitter ...


A Method For Evaluating Power Generation Concepts Considering The Optimal Concept Of Operations, Tianlei Zhang Jan 2013

A Method For Evaluating Power Generation Concepts Considering The Optimal Concept Of Operations, Tianlei Zhang

Theses and Dissertations

When trying to select an appropriate power generation plant for a micro-grid power distribution system like an electric ship, designers must consider both the physical characteristics (e.g., weight, volume, power ratings) and performance characteristics (e.g., fuel consumption, quality of service) of all the design alternatives. Comparing the design alternatives in terms of the physical characteristics is relatively straightforward, but in terms of performance characteristics each design alternative has to be evaluated within its own optimal performance points to make a fair comparison. However, at present no effective method or software tools exist to enable this evaluation at the ...