The exciting properties of multi-valued logic (MVL) in overcoming the limitations of binary systems have led to widespread research on this topic. Considering various types of MVL, quaternary logic is more compatible with the existing binary systems. This paper proposes a nonvolatile quaternary flip-flop (NQFF) based on the unique features of the carbon nanotube field-effect transistors (CNTFETs) and magnetic tunnel junctions (MTJs). The proposed NQFF utilizes Spin-Hall effect (SHE)-assisted spin-transfer torque (STT) MTJs to provide nonvolatility with lower write energy, and multi-Vt gate-all-around (GAA) CNTFETs offer higher performance. On the other side, due to the usage of a shadow latch and the design of the proposed circuit, the delay of MTJ switching does not affect the delay of the whole circuit. The simulation results show that the proposed NQFF offers 50% lower PDP when the system is idle for only 25% of its total operational time.

多值逻辑 (MVL) 在克服二进制系统的局限性方面的令人兴奋的特性导致了对该主题的广泛研究。考虑到各种类型的 MVL，四元逻辑与现有的二进制系统更兼容。本文提出了一种基于碳纳米管场效应晶体管 (CNTFET) 和磁隧道结 (MTJ) 的独特特性的非易失性四元触发器 (NQFF)。拟议的 NQFF 利用自旋霍尔效应 (SHE) 辅助自旋转移力矩 (STT) MTJ 以较低的写入能量提供非易失性，而多 Vt 环栅 (GAA) CNTFET 提供更高的性能。另一方面，由于影子锁存器的使用和所提出电路的设计，MTJ 开关的延迟不会影响整个电路的延迟。