Review on Design and Analysis of ALU Using Reversible Logic Gates

Abstract

[1] Reversible logic has been of great scientific interest in recent years because of its ability to reduce power dissipation which is the main requirement in low power design. Optimization of power is the primary necessity in portable devices like battery operated devices.  It finds its wide range of applications in the fields of Optical computing, Quantum computing, Complementary Metal oxide semiconductor and Nanotechnology. The reversible computing can be performed by using reversible logic gates which perform arithmetic and logical operations. The ALU (Arithmetic Logic Unit) is a digital electronic circuit that conducts operations on binary numbers in arithmetic and bitwise logical ways. It is used to perform all logical and arithmetic function in processors. It is also an important subsystem in digital system design. An ALU has a variety of input and output nets which are used to convey digital signals between the ALU and external circuitry. [4] ALUs which are designed using non reversible logic gates consume more power. So, there is a need for low power consuming ALU designs. This paper is a review of previous works on the design and implementation of ALU using reversible logic gates.  The key objective of this work is to analyze the design of the function blocks individually, in order to attain better understanding about reversible computing.