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Design of a 2–4 Decoder Based on All-Spin Logic and Magnetic Tunnel Junction
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Design of a 2–4 Decoder Based on All-Spin Logic and Magnetic Tunnel Junction
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Design of a 2–4 Decoder Based on All-Spin Logic and Magnetic Tunnel Junction
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Journal Article
Design of a 2–4 Decoder Based on All-Spin Logic and Magnetic Tunnel Junction
2025
Overview
A 2–4 decoder based on all-spin logic (ASL) and magnetic tunnel junction (MTJ) is proposed. The decoder employs five-input minority gates to realize three-input NOR gates, which reduces the circuit size compared to the three-input minority gates. Simultaneously, the inputs of the original and reverse variables are implemented by initializing the MTJ fixed layer magnetization in different directions, which avoids the use of inverters. In addition, the 2–4 decoder adopts a single-input single-fan-out (SISF) structure, which reduces the channel length. To illustrate the advantages of the five-input minority gate, inverter-free structure, and SISF structures in designing the proposed 2–4 decoder, a second 2–4 decoder is proposed that uses three-input minority gates, inverters, and a single-input multiple-fan-out structure. Compared with the second decoder, the first decoder has the layout area reduced to 37.9%, the total channel length reduced to 40.8%, and the number of clock cycles reduced to one-third. Importantly, the design methods used in this work, such as multi-input minority gates, SISF structure, and inverter-free structure, provide an interesting approach for designing large-scale ASL logic circuits.
