W. Kuang, J. S. Yuan, R. F. DeMara, M. Hagedorn, and K. Fant, "Performance Analysis and Optimization of NCL Self-timed Rings," IEE Proceedings on Circuits, Devices, and Systems, Vol. 150, No. 3, June, 2003, pp. 167 - 172. Abstract: A self-timed ring using NULL convention logic (NCL) is presented. An analytical method to evaluate the speed of NCL rings has been developed. The analytical predictions are verified by a Synopsys simulation and excellent agreement between the theoretical predictions and simulation results is obtained. Some important principles for ring optimization are obtained. The analysis leads to the speed optimization of a 24bit NCL divider.