Reversible Logic Based Arithmetic and Logic Unit
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 30, Vol 3, Issue 2
Abstract
Reversible logic has received great attention in the recent years due to its ability to reduce the power dissipation which is the main requirement in low power digital design. It has wide applications in advanced computing, low power CMOS design, Optical information processing, DNA computing, bio information, quantum computation and nanotechnology. Conventional digital circuits dissipate a significant amount of energy because bits of information are erased during the logic operations. Thus, if logic gates are designed such that the information bits are not destroyed, the power consumption can be reduced dramatically. The information bits are not lost in case of a reversible computation. This has led to the development of reversible gates. ALU is a fundamental building block of a central processing unit (CPU) in any computing system; reversible arithmetic unit has a high power optimization on the offer. By using suitable control logic to one of the input variables of parallel adder, various arithmetic operations can be realized. In this paper, ALU based on a Reversible low power control unit for arithmetic & logic operations is proposed. In our design, the full Adders are realized using synthesizable, low quantum cost, low garbage output DPeres gates. This paper presents a novel design of Arithmetic & Logical Unit using Reversible control unit. These Reversible ALU has been modeled and verified using Verilog and Quartus II 5.0 simulator. Comparative results are presented in terms of number of gates, number of garbage outputs, number of constant inputs and Quantum cost.
Authors and Affiliations
Khushboo Ahirwar
Keywords
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