Quaternary memory and logic circuits have been studied by researchers, as they can provide denser integrated circuits and subsequently lower area and power consumption via succinct interconnects. Using multithreshold gate-all-around carbon nanotube field-effect transistors and the nonvolatile feature of magnetic tunnel junctions (MTJs), this letter proposes a bio-inspired variation-aware nonvolatile quaternary latch (Qlatch). Nonvolatility allows the system to be completely powered off during the idle state to reduce standby power significantly without the need for extra component and data loss. Moreover, thanks to the bio-inspired structure of the Qlatch, and the fact that no sense amplifier is used in this circuit to read the MTJs, the Qlatch is more robust to process variations. Simulation results show that the nonvolatile Qlatch consumes 7% less dynamic power and 12% less static power than the conventional Qlatch, has a 61% lower delay, and has 68% lower power delay product.

中文翻译：

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BVA-NQSL：一种仿生变化感知非易失性四元自旋电子锁存器

研究人员已经研究了四元存储器和逻辑电路，因为它们可以提供更密集的集成电路，随后通过简洁的互连降低面积和功耗。这封信使用多阈值环栅碳纳米管场效应晶体管和磁性隧道结 (MTJ) 的非易失性特征，提出了一种受生物启发的变异感知非易失性四元锁存器 (Qlatch)。非易失性允许系统在空闲状态下完全断电，从而显着降低待机功耗，而无需额外的组件和数据丢失。此外，由于 Qlatch 的仿生结构，以及该电路中没有使用读出放大器来读取 MTJ 的事实，Qlatch 对工艺变化更加稳健。