Time-Difference Circuits: Methodology, Design, And Digital Realization, 2019 University of Massachusetts Amherst
Time-Difference Circuits: Methodology, Design, And Digital Realization, Shuo Li
This thesis presents innovations for a special class of circuits called Time Difference (TD) circuits. We introduce a signal processing methodology with TD signals that alters the target signal from a magnitude perspective to time interval between two time events and systematically organizes the primary TD functions abstracted from existing TD circuits and systems. The TD circuits draw attention from a broad range of application fields. In addition, highly evolved complementary metal-oxide-semiconductor (CMOS) technology suffers from various problems related to voltage and current amplitude signal processing methods. Compared to traditional analog and digital circuits, TD circuits bring several compelling features: …
A Study On Controlling Power Supply Ramp-Up Time In Sram Pufs, 2019 University of Massachusetts Amherst
A Study On Controlling Power Supply Ramp-Up Time In Sram Pufs, Harshavardhan Ramanna
With growing connectivity in the modern era, the risk of encrypted data stored in hardware being exposed to third-party adversaries is higher than ever. The security of encrypted data depends on the secrecy of the stored key. Conventional methods of storing keys in Non-Volatile Memory have been shown to be susceptible to physical attacks. Physically Unclonable Functions provide a unique alternative to conventional key storage. SRAM PUFs utilize inherent process variation caused during manufacturing to derive secret keys from the power-up values of SRAM memory cells.
This thesis analyzes the effect of supply ramp-up times on the reliability of SRAM …
Influence Of Flow Rate, Nozzle Speed, Pitch And The Number Of Passes On The Thickness Of S1805 Photoresist In Suss Microtec As8 Spray Coater, 2019 Singh Center for Nanotechnology
Influence Of Flow Rate, Nozzle Speed, Pitch And The Number Of Passes On The Thickness Of S1805 Photoresist In Suss Microtec As8 Spray Coater, Rohan Sanghvi, Gyuseok Kim
S1805 positive photoresist has been deposited on single crystalline Si wafers using a Suss MicroTec Alta Spray. The inﬂuence of ﬂow rate, nozzle speed, pitch and number of passes on the thickness of the photoresist was studied. Results show that the thickness of S1805 is linearly proportional to the ﬂow rate and number of passes, and inversely proportional to the nozzle speed and pitch.
Correction Of Pattern Size Deviations In The Fabrication Of Photomasks Made With A Laser Direct-Writer, 2019 Singh Center for Nanotechnology
Correction Of Pattern Size Deviations In The Fabrication Of Photomasks Made With A Laser Direct-Writer, Ningzhi Xie, George Patrick Watson
Protocols and Reports
When using Heidelberg DWL66+ laser writer to fabricate the photomask, the pattern feature dimensions may have deviations. These deviations can be caused by the lithography process and the undercut in the metal etch process. The same deviation value of 0.8µm was found to appear in all the patterns independent of the pattern original size and local pattern density. To overcome this universal deviation, a universal bias is suggested to be applied to the original patterns during the data preparation for the lithography process. In order to ensure this pre-exposure bias method can work, both the laser direct-write exposure conditions (laser …
Vehicle Sensing And Communications Using Led Headlights To Enhance The Performance Of Intelligent Transportation Systems: Proof Of Concept, Implementation, And Applications, 2019 Oklahoma State University
Vehicle Sensing And Communications Using Led Headlights To Enhance The Performance Of Intelligent Transportation Systems: Proof Of Concept, Implementation, And Applications, Sabit Ekin, Samir Ahmed
Corresponding data set for Tran-SET Project No. 18ITSOKS01. Abstract of the final report is stated below for reference:
"This project investigates the use of vehicle light-emitting diode (LED) headlamp devices for improving the accuracy and reliability of traffic (sensing and communication) data measurements required for developing effective intelligent transportation systems (ITS) technologies and solutions.
Vehicular communication and sensing technologies are mainly based on conventional radio frequency (RF) or laser technologies. These systems suffer from several issues such as RF interference and poor performance in scenarios where the incidence angle between the speed detector and the vehicle is rapidly varying. Introducing …
Switching Trajectory Control For High Voltage Silicon Carbide Power Devices With Novel Active Gate Drivers, 2019 University of Arkansas, Fayetteville
Switching Trajectory Control For High Voltage Silicon Carbide Power Devices With Novel Active Gate Drivers, Shuang Zhao
Graduate Theses and Dissertations
The penetration of silicon carbide (SiC) semiconductor devices is increasing in the power industry due to their lower parasitics, higher blocking voltage, and higher thermal conductivity over their silicon (Si) counterparts. Applications of high voltage SiC power devices, generally 10 kV or higher, can significantly reduce the amount of the cascaded levels of converters in the distributed system, simplify the system by reducing the number of the semiconductor devices, and increase the system reliability.
However, the gate drivers for high voltage SiC devices are not available on the market. Also, the characteristics of the third generation 10 kV SiC MOSFETs …
Flight Director Embedded System And Mobile Ios Application, 2019 California Polytechnic State University, San Luis Obispo
Flight Director Embedded System And Mobile Ios Application, Anthony Epshteyn
For my senior project, I was asked to assist an Aerospace Engineering professor with the design of his new glider. He needed to create a flight director-type instrument so that his pilot could get the aircraft’s positional data during flight. This positional data came from a powerful sensor mounted on the fuselage. To interface with the sensor, I created an embedded system comprised of a ESP32 micro-controller communicating with the sensor via UART/RS-232. The micro-controller was mounted on a breadboard and connected to the sensor via jumper wires. The ESP32 featured a Bluetooth chip that allowed for communication using the …
Dashboard, 2019 California Polytechnic State University, San Luis Obispo
Dashboard, Bradley Manuel Levin, Kyle Matthew King
Modern gamers are always looking for new and exciting ways to play board games. Our senior project, DashBoard, is intended to capitalize on this interest and upgrade board games to have pre-programmed moves and easy piece moving. It is a proof-of-concept project for a programmable chess-style game board using an electromagnet array to move the pieces around the board. With an easily programmable interface with the Raspberry Pi 3, users can make their own programs or find ones others have made online to move pieces in creative ways.
Tidalsim Senior Project Report, 2019 California Polytechnic State University, San Luis Obispo
Tidalsim Senior Project Report, Kent Zhang, Colin Vandervoort
Throughout the course of this project, our team helped the Cal Poly Biological Sciences department refine an intertidal zone simulator. The aim of this device is to allow any marine biologist to easily simulate a vast range of tidal zones in order to test animal behaviors within these zones. Another goal of this project is to make each simulation tank independent from the others by using a single microcontroller to handle all inputs and outputs of the system as well as logging all relevant data. The current system is set up so that a separate microcontroller handles dissolved oxygen and …
Weight Controlled Electric Skateboard, 2019 California Polytechnic State University, San Luis Obispo
Weight Controlled Electric Skateboard, Zachary Barram, Carson Bertozzi, Vishnu Dodballapur
Technology and the way that humans interact is becoming more vital and omnipresent with every passing day. However, human interface device designers suffer from the increasingly popular “designed for me or people like me” syndrome. This design philosophy inherently limits accessibility and usability of technology to those like the designer. This places severe limits of usability to those who are not fully able as well as leaves non-traditional human interface devices unexplored. This project set out to explore a previously uncharted human interface device, on an electric skateboard, and compare it send user experience with industry leading human interface devices.
Cmos Design Of An 8-Bit 1ms/S Successive Approximation Register Adc, 2019 California Polytechnic State University, San Luis Obispo
Cmos Design Of An 8-Bit 1ms/S Successive Approximation Register Adc, Ameya Vivekanand Ganguli
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 to rely on non-rechargeable batteries to sustain a life span of up to 10 years. Analog-to-digital converters (ADCs) are key components in these power limited systems. Therefore, development of ADCs with medium resolution (8-10 bits) and sampling rate (1 MHz) have been of great importance.
This thesis presents an 8-bit successive approximation register (SAR) ADC incorporating an …
Analog Single Sideband-Pulse Width Modulation Processor For Parametric Acoustic Arrays, 2019 California Polytechnic State University, San Luis Obispo
Analog Single Sideband-Pulse Width Modulation Processor For Parametric Acoustic Arrays, Vikrant A. Marathe
Parametric acoustic arrays are ultrasonic-based loudspeakers that produce highly directive audio. The audio must first be preprocessed and modulated into an ultrasonic carrier before being emitted into the air, where it will self-demodulate in the far field. The resulting audio wave is proportional to the double time-derivative of the square of the modulation envelope. This thesis presents a fully analog processor which encodes the audio into two Pulse Width Modulated (PWM) signals in quadrature phase and sums them together to produce a Single Sideband (SSB) spectrum around the fundamental frequency of the PWM signals. The two signals are modulated between …
Design Of An Embedded Iris Recognition System For Use With A Multi-Factor Authentication System., 2019 University of Arkansas, Fayetteville
Design Of An Embedded Iris Recognition System For Use With A Multi-Factor Authentication System., Christopher David Hess
Electrical Engineering Undergraduate Honors Theses
This paper describes in detail the design, manufacturing and testing of an embedded iris scanner for use with a multifactor authentication system. The design process for this project included hardware design from part selection to board design to populating. Additionally, this process included the entirety of the software development, though the iris recognition process was largely based on other works. The functional requirements for the overall multi-factor authentication system were to have three authentication methods with a thirty second window to complete all three. The system acceptance accuracy was required to be greater than 75%. Those requirements therefore dictate that …
Hardware Ip Classification Through Weighted Characteristics, 2019 University of Arkansas, Fayetteville
Hardware Ip Classification Through Weighted Characteristics, Brendan Mcgeehan
Graduate Theses and Dissertations
Today’s business model for hardware designs frequently incorporates third-party Intellectual Property (IP) due to the many benefits it can bring to a company. For instance, outsourcing certain components of an overall design can reduce time-to-market by allowing each party to specialize and perfect a specific part of the overall design. However, allowing third-party involvement also increases the possibility of malicious attacks, such as hardware Trojan insertion. Trojan insertion is a particularly dangerous security threat because testing the functionality of an IP can often leave the Trojan undetected. Therefore, this thesis work provides an improvement on a Trojan detection method known …
Automated Greenhouse Watering System For Schenectady Arc, 2019 Union College - Schenectady, NY
Automated Greenhouse Watering System For Schenectady Arc, Lisa Gu
All people need to feel useful and able to perform productive jobs. Since 1952, the ARC has strived to provide people with developmental disabilities the resources, services, and support that enable them to advocate and participate within their communities. One way in which the ARC accomplishes this mission is by encouraging people with disabilities to develop skills and hobbies that give them independence and purpose. An integral part of their center is the greenhouse. Individuals at the Maple Ridge Center are responsible for operating the water system to irrigate the plot daily and ensuring that the proper amount of water …
Asynchronous Circuit Synthesis Using Multi-Threshold Null Convention Logic, 2019 University of Arkansas, Fayetteville
Asynchronous Circuit Synthesis Using Multi-Threshold Null Convention Logic, Nicholas Renoudet Mize
Graduate Theses and Dissertations
As the demand for an energy-efficient alternative to traditional synchronous circuit design grows, hardware designers must reconsider the traditional clock tree. By doing away with the constrains of a clock, asynchronous sequential circuit designs can achieve a much greater level of efficiency. The utilization of asynchronous logic synthesis flows has enabled researchers to better implement asynchronous circuit designs which have been optimized using the same industry standard tools that are already used in sequential synchronous designs. This thesis offers a new flow for such tools which implements the MTNCL asynchronous circuit architecture.
Real-Time Fault Detection And Reconfiguration Of A Three-Phase Electric Motor Drive, 2019 Boise State University
Real-Time Fault Detection And Reconfiguration Of A Three-Phase Electric Motor Drive, Danyal Mohammadi
Boise State University Theses and Dissertations
Variable-frequency drives (VFDs) are widely used for control of electrical machines such as induction motors (IMs) or permanent-magnet synchronous motors (PMSMs). Similar to other electrical devices, these drives are subject to failure. Several types of faults are associated with VFDs. For instance, faults such as an open-switch fault, a short-circuit switch fault are the two common faults in VFDs. These faults can yield catastrophic consequences if proper remedial action is not taken.
A unique remedial topology for the post-fault period and a new pulse width modulation (PWM) strategy are proposed so that not only the motor drive can continue the …
Model Development And Assessment Of The Gate Network In A High-Performance Sic Power Module, 2019 University of Arkansas, Fayetteville
Model Development And Assessment Of The Gate Network In A High-Performance Sic Power Module, William Austin Curbow
Graduate Theses and Dissertations
The main objective of this effort is to determine points of weakness in the gate network of a high-performance SiC power module and to offer remedies to these issues to increase the overall performance, robustness, and reliability of the technology. In order to accomplish this goal, a highly accurate model of the gate network is developed through three methods of parameter extraction: calculation, simulation, and measurement. A SPICE model of the gate network is developed to analyze four electrical issues in a high-speed, SiC-based power module including the necessary internal gate resistance for damping under-voltage and over-voltage transients, the disparity …
An Electrooculography Prosthetic Control System, 2019 University of Nebraska at Omaha
An Electrooculography Prosthetic Control System, Walker Arce
UNO Student Research and Creative Activity Fair
For many surface EMG (sEMG) prosthetic control systems, the muscles on the affected limb are used to trigger the control system. This can lead to fatigue in the user as they have to maintain continuous muscle activation and coactivation in order to achieve prosthetic control . The crux of any prosthetic control system is the human machine interface that is developed, and at present many control systems have complicated interfaces that limit the degrees of freedom of the prosthetics. This study focuses on the development of a low-cost prosthetic control peripheral that is compatible with the prosthetics developed by Dr. …
Reactive Ion Etching Selectivity Of Si/Sio2: Comparing Of Two Fluorocarbon Gases Chf3 And Cf4, 2019 Singh Center for Nanotechnology
Reactive Ion Etching Selectivity Of Si/Sio2: Comparing Of Two Fluorocarbon Gases Chf3 And Cf4, Meiyue Zhang, Pat Watson
Protocols and Reports
Two reactive ion etching (RIE) processes were studied to show the relative etch selectivity between SiO2 and Si using two ﬂuorocarbon gases, CF4 and CHF3. Results show that CHF3 gives better selectivity (16:1) over CF4 (1.2 :1). On the other hand, the etch rate of SiO2 of CF4 is approximately 52.8 nm/min, faster than CHF3 (32.4 nm/min).