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Title New Power-efficient Flip-flop based on a True Single-phase Clock and Robust to Single-node Upsets
Authors (Soonbum Song) ; (Youngmin Kim)
DOI https://doi.org/10.5573/IEIESPC.2021.10.2.167
Page pp.167-175
ISSN 2287-5255
Keywords Power-efficient; Fast; Single-event transient (SET); Single-event upset (SEU); Single-node upset (SNU); Radiation-hardened by design (RHBD); True single-phase clock (TSPC)
Abstract As the size of technology shrinks, its immunity to the space radiation environment decreases. A single-event transient (SET) induced by radiation can cause permanent damage to devices. Therefore, engineers have been researching radiation-hardened flip-flops or latches that are robust to soft errors. This paper proposes a true-single-phase-clock (TSPC)-based single-node-upset (SNU)-tolerant flip-flop, which is robust to SNUs and even faster than conventional DFFs. This flip-flop consists of two modules of TSPC flip-flops, except for inverters, and a Muller C-element.
It has only 22 transistors, which makes it area-efficient. Moreover, the proposed flip-flop uses a TSPC; hence, the clock-to-Q delay is 10% less than the conventional DFF.