2021/08/08 by Gourav Datta, Datta, Gourav, Shidie Lin +3
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2108.03719
openalex publication_date 2021/08/08 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
Digital single-flux quantum (SFQ) technology promises to meet the demands of\nultra low power and high speed computing needed for future exascale\nsupercomputing platforms. However, clocking SFQ logic circuits remains a\nchallenge due to the presence of a large number of on-chip clock sinks, and\nhence, decomposing large designs into multiple independent clock domains\nsimilar to CMOS, have been proposed. However, such clock domains demand\nefficient synchronizing First-in-first-out (FIFO) buffers and robust interfaces\nto safely transfer data from one clock domain to another. In this brief, we\npropose such a FIFO synchronizer and clock-domain crossing interface for both\nuni and bi-directional data transfer without any significant degradation of the\nclock frequency. Our proposal scales to complex gate-level pipelined SFQ logic\ncores while demonstrating extremely low Bit Error Rate (BER) and is unaffected\nby noise, given current SFQ lithography feature sizes.\n