Since last decade, optical computing has emerged as one of the promising computing paradigm in the field of ultra-fast computations and the recent advancements of fabrication technology in photonic industry has further boosted research interests to investigate in this field. In this conjuncture, strategies for designing efficient optical circuits bear much significance toward building cost efficient logic circuits. Not only synthesis schemes but manual designs for logic components are found very effective in way to produce optimal designs. In this work, we present the optical domain designs of an important logic module of ALU—adder circuit. Not only we have made the adder circuit optical domain supporting one but also we have ensured that the designs are optimized too. Here we have worked with two types of adder circuits Carry-Lookahead Adder and Carry-Skip Adder. All the designs are made using Mach–Zehnder interferometers based optical components and interconnect. For both the adder types, two different designs are shown and in each of these designs both the circuit cost parameters and response time is improved. Design overhead and hardware complexities for all the circuits are computed and have compared with related work’s design, where we have found that our designs are having less delay and cost efficient compared to the existing ones.
Journal of The Institution of Engineers (India): Series B – Springer Journals
Published: Jun 1, 2018
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