Abstract-A simple and accurate analytical model for evaluating the oscillation period of Self-
timed rings is proposed. Thank to this model, the designer can easily choose the number of
stages and the appropriate ring initialization. The model is so simple that it can quickly
provide an estimation of the oscillation period only with a paper sheet and a pen.
Nevertheless it takes into account analog effect called “Charlie effect”. The Charlie effect is
of prime importance when modeling the behavior of asynchronous rings. Moreover the ...