Abstract
In multi-valued logic (radix>2), quaternary multiplexer (also known as T-gate) places a significant role for data transmission and signal processing. Four valued multiplexer transmit one data (from 4-input) to the output corresponding to the one selected input. Any four-valued logic can be implemented using T-gate. So it is called ‘universal’ element. In this paper some all-optical quaternary logical operations, quaternary half-adder, quaternary multiplier and quaternary comparator is proposed and described using only all-optical quaternary T-gate.
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