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This paper reports results of a study on pulse signaling. In pulse signaling, components communicate by means of pulses instead of voltage transitions. The functionality of the components is very similar to the functionality of components used in so-called asynchronous transition signalling. In asynchronous transition signalling, communication events are represented by voltage transitions, whereas in pulse signaling communication events are represented by pulses. We describe various implementations of pulse-signaling components, report on the energy efficiencies of our implementations, and look at some robustness aspects.