Date of Graduation


Document Type


Degree Name

Master of Science in Computer Engineering (MSCmpE)

Degree Level



Computer Science & Computer Engineering


Jia Di

Committee Member

Dale R. Thompson

Second Committee Member

Scott C. Smith


Applied sciences, asynchronous circuits, Energy efficiency, Integrated circuits, Multi-threshold null convention logic, Null convention logic


Power and energy consumption are the primary concern of the digital integrated circuit (IC) industry. Asynchronous logic, in the past several years, has increased in popularity due to its low power nature. This thesis analyzes a collection of array multipliers with different parameters to compare two asynchronous design paradigms, NULL Convention Logic (NCL) and Multi-Threshold NULL Convention Logic (MTNCL). Several commercially available pieces of software and custom scripts are used to analyze the asynchronous circuits and their components to provide the energy consumption estimation on various parts of each circuit. The analysis of the software results revealed that MTNCL circuits are more energy efficient for any size provided the number of pipeline stages does not become too great. Otherwise NCL would consume less energy. A combinational logic gate count to register gate count ratio of 3 was given to help determine when an MTNCL circuit would have too many pipeline stages for circuits designed with IBM's 130nm 8RF-DM design kit.