Magnetic Quantum Cellular Automata-Based Logic Computation Structure: A Full-Adder Study
Xiaokuo Yang, Li Cai, Qiang Kang · Journal of Computational and Theoretical Nanoscience · 2012
Magnetic quantum cellular automata (MQCA) device has drawn much attention recently due to its substantial advantages of nonvolatile data retention, potentially low power and room temperature operation. This paper theoretically demonstrates pipelined and robust logic computation architecture for MQCA (MQCA full adder). The architecture is based on different three-direction-input magnetic majority gate and utilizes a data blocking region. Data flow and computation synchronization are realized by proposed six-zone time division quasiadiabatic clocking. Micromagnetic simulation demonstrates the function validity of proposed MQCA full adder, and comparation with previous conceptual designs as to their area and complexity shows that new architecture presents superior performance. Furthermore, we investigate non-ideal characteristics of MQCA full adder. How clocking field magnitude affects signal propagation of the MQCA full adder is examined. The results show that there exists an optimal 'null' clocking field magnitude to drive the circuit.