Design of an Efficient XOR Circuit in Nanomagnetic Logic
Subject Areas : electrical and computer engineering
Samira
Sayedsalehi
1
Z.
Azadi Motlag
2
Keywords: Nanomagnetic cellmajority gateXOR, nanomagnetic logicnanoelectronics,
Abstract :
The aim of this paper is to suggest new and efficient designs for XOR circuits based on nanomagnetic logic technology in order to implementation of nanomagnetic computational circuits such as adders, subtractors and multipliers. Nanomagnetic logic due to its properties such as very high speed, low power consumption, scalability and working on room temperature is a suitable alternative for conventional transistor technology. First, nanomagnetic majority gates are introduced then two efficient designs with minimum area, minimum number of nanomagnetic elements and lowest delays for XOR circuits are proposed based on a three-input minority gate and a five-input majority gate. Basic elements in these designs are out-of-plane nanomagnetic cells made of Co/Pt, due to relative advantages of this alloy. Clocking field which is an external uniform magnetic field is required for proper performance of these proposed circuits. MagCAD tool was used for implementation of these designs, and the accuracy of operation of these circuits was proved by applying Modelsim simulator. According to the results of this simulation, it is shown that the proposed single layer and multilayer three-input XOR gates have improvement in comparison to the state-of-art design in number of gates 50% and 25%, in delay 80% and 80%, and in the number of elements 23% and 21%, respectively.
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