Abstract
As the CMOS process continues to decrease in size, the latch becomes increasingly vulnerable to the triple-node-upset (TNU), leading to a decrease in circuit reliability in harsh radiation environments. In this paper, a low-cost TNU self-recovery latch (LCTR) is proposed, which is based on one PMOS and two NMOS (1P2N) inverters and C-elements (CEs) forming a multi-level feedback loop. Due to the error interception function of these fundamental elements, the proposed latch completely realizes TNU self-recovery capability. Then the simulated tests are used for comparing the overhead of the LCTR latch and the other two typical TNU self-recoverable latches. The results reveal that the LCTR latch decreases power consumption by 56.98%, delay by 30.08%, area by 21.25% and PDP by 70.77%, respectively. Moreover, the LCTR latch is moderately sensitive to the variation of process, voltage and temperature (PVT).
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