ABSTRACT
Most approaches to the construction of high-speed computers and logic systems in the past have been first, to go from serial to parallel circuitry, and then to use faster and faster components to increase the operational speed of the circuitry. High-speed components have reached the state where we are not talking about switching times in the order of the light-foot. That is, if we have a switching circuit with a switching time of one millimicrosecond, the theoretical limit in which we can switch this information from one point to another requires that the separation distance be less than one foot. This is the theoretical limit imposed by the velocity of light and shows that we are rapidly approaching the limits of switching speed.
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