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Optoelectronic Valley-Spin Qubits With Ambipolar Quantum Dots, Jeremy Tull
Optoelectronic Valley-Spin Qubits With Ambipolar Quantum Dots, Jeremy Tull
Electrical Engineering Undergraduate Honors Theses
The current limitations of qubit-based processors are caused by imperfections in quantum gates, leading to a lack of gate fidelity. Gate fidelity can be refined by extending the coherence of qubits and reducing logic operation speed. A potential solution is to develop a hybrid qubit that has the coherence of electrically-controlled quantum dots and the gate speed of their optically-controlled counterparts. Quantum bits that utilize ultrafast optical gating to perform gate operations require precise control of the gating pulse duration. Optical dispersion can cause adverse effects pulse duration, such as pulse broadening, so dispersion-compensation techniques must be employed; by properly …
Methods Of High-Fidelity, High-Efficiency Class-D Audio Amplification, Kaleb Kassaw
Methods Of High-Fidelity, High-Efficiency Class-D Audio Amplification, Kaleb Kassaw
Electrical Engineering Undergraduate Honors Theses
Gallium nitride-based field effect transistors (FETs) have opened a path for full-frequency-range class-D audio amplifiers with low distortion and noise, thanks to their ability to switch at much higher frequencies than that of the upper range of human hearing. Compared to traditional silicon-based transistors, GaN-based transistors offer superior efficiencies, particularly at power levels below their maxima. Paired with an analog-to-digital converter, digital signal processor, and pulse-code modulation to pulse-width modulation converter, these transistors are used to design and implement a solid-state amplifier capable of generating 100 watts of output through speakers with an impedance of 8 ohms using a 1-volt …
Design Of An Embedded Iris Recognition System For Use With A Multi-Factor Authentication System., Christopher David Hess
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 …
Transmission Of Stereo Audio Signals With Lasers, William Austin Curbow
Transmission Of Stereo Audio Signals With Lasers, William Austin Curbow
Electrical Engineering Undergraduate Honors Theses
An alternative method for transmitting audio signals via the use of laser technology was presented here. The primary focus of this document is on the audio amplifier subsystem including the design, simulation, and performance results. Simulations using the PSPICE computer simulation software were utilized to investigate the theoretical designs of the audio amplifier subsystem. The audio amplifier was examined in three junctures including the noise-canceling input stage, the high voltage gain cell, and the low impedance driver. Through the design procedure using theoretical calculations, simulations using PSPICE computer software, and examination of the finished product with an oscilloscope, the audio …