Date of Graduation
5-2015
Document Type
Dissertation
Degree Name
Doctor of Philosophy in Engineering (PhD)
Degree Level
Graduate
Department
Computer Science & Computer Engineering
Advisor/Mentor
Dale R. Thompson
Committee Member
James P. Parkerson
Second Committee Member
Homer A. Mantooth
Keywords
Asynchronous, Design flow, Digital, High temperature, Integrated circuit, Silicon carbide
Abstract
Designing a digital circuit to operate in an extreme temperature range is a challenge with increasing demand for a solution. Large variations in temperature have a distinct impact on electron mobilities causing substantial changes to the threshold voltage of the devices. These physical changes affect the setup and hold times of clocked components, such as D-Flip Flops, of a traditional synchronous digital circuit. Focusing primarily on high temperature circuit operation, this dissertation presents a digital circuit design methodology pairing an asynchronous circuit design paradigm called NULL Convention Logic (NCL) as well as traditional Boolean circuitry with a wide-bandgap semiconductor material, Silicon Carbide (SiC). A total of nineteen circuits have been designed and fabricated. Chip testing results show correct operation for all circuits returned from fabrication, with most performing at or above the targeted temperature of 300°C.
Citation
Caley, L. J. (2015). High Temperature CMOS Silicon Carbide Asynchronous Circuit Design. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/30