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Variation Tolerant Energy Efficient Design For Ultra Low Voltage Digital Circuits, Preyom Dey
Variation Tolerant Energy Efficient Design For Ultra Low Voltage Digital Circuits, Preyom Dey
Electrical and Computer Engineering ETDs
The demand of extremely long battery life for electronic devices is the driving force for modern semiconductor industry in recent years. Supply voltage scaling offers a promising solution for this matter. To control the energy consumption and limit the power dissipation of a circuit, supply voltage should be scaled continually. Threshold voltage should also be reduced to sustain performance and reliability. This scaling of supply and threshold voltage imposes several bottlenecks in ultra-low voltage circuit design. One of the major barriers for ultra-low voltage design is the performance deviation of digital circuit due to supply voltage variation. As technology scales, …
Multispectral Metamaterial Detectors For Smart Imaging, John A. Montoya
Multispectral Metamaterial Detectors For Smart Imaging, John A. Montoya
Electrical and Computer Engineering ETDs
The ability to produce a high quality infrared image has significantly improved since its initial development in the 1950s. The first generation consisted of a single pixel that required a two-dimensional raster scan to produce an image. The second generation comprised of a linear array of pixels that required a mechanical sweep to produce an image. The third generation utilizes a two-dimensional array of pixels to eliminate the need for a mechanical sweep. Third generation imaging technology incorporates pixels with single color or broadband sensitivity, which results in 'black and white' images. The research presented in this dissertation focuses on …
Communication-Theoretic Foundations For Optical Receivers Using Dynamically Biased Avalanche Photodiodes, Georges El-Howayek
Communication-Theoretic Foundations For Optical Receivers Using Dynamically Biased Avalanche Photodiodes, Georges El-Howayek
Electrical and Computer Engineering ETDs
To meet the demands of the exponential growth in video, voice, data and mobile device traffic over the internet, the telecommunication industry has been moving toward higher speed protocols such as 40-Gb/s and 100-Gb/s. Operations at such high speeds require detectors with optimized internal gain (leading to high sensitivity) to reduce cost. Avalanche photodiodes (APDs) are commonly used photodetectors in many high-speed optical receivers due to their internal optoelectronic gain, which allows the photogenerated current to dominate the thermal noise without the need for optical pre-amplification of the received optical signal. However, the long avalanche buildup time associated with APDs, …