Reversible Logic Multipliers: Novel Low-cost Parity-Preserving Designs


School of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran


Reversible logic is one of the new paradigms for power optimization that can be used instead of the current circuits. Moreover, the fault-tolerance capability in the form of error detection or error correction is a vital aspect for current processing systems. In this paper, as the multiplication is an important operation in computing systems, some novel reversible multiplier designs are proposed with the parity-preserving property which will be useful for error detection. At first, two optimal signed serial multipliers are presented based on the Booth’s algorithm and its enhanced version called the K-algorithm, utilizing the new arrangements of reversible gates. Then, another low-cost serial multiplier is proposed based on the conventional Add & Shift method to be utilized in the applications in which unsigned numbers are used. Finally, a new signed parallel multiplier is proposed based on the Baugh-Wooley method that is useful for speed-critical applications. The comparative results showed that the proposed multipliers are much better than the existing designs regarding the main criterions used in reversible logic circuits including quantum cost, gate count, constant inputs, and garbage outputs.


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