Design and Implementation of a Single Flux Quantum Logic-Based Memory Controller for Josephson-CMOS Hybrid Memory Systems

Demirhan, Seda; Bozbey, Ali

doi:10.1109/tasc.2020.3012382

Cited by 5 publications

(1 citation statement)

References 23 publications

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“…When compared to semiconductor technology, rapid single flux quantum (RSFQ) circuits have the advantages of higher speed and reduced power consumption [1]. Next-generation high-performance computing [2][3][4][5], in which core processor circuits process constant streams of data at several tens of gigahertz [6][7][8][9][10][11][12], is one of the most promising uses of RSFQ technology. Demonstrating the long-term stability of the RSFQ circuit operating at high frequencies is critical for research and development toward real-world applications.…”

Section: Introductionmentioning

confidence: 99%

On-chip test vector generation and downsampling for testing RSFQ circuits

Chen¹,

Ying²,

Ren³

et al. 2022

Supercond. Sci. Technol.

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An on-chip high-frequency testing method for rapid single flux quantum (RSFQ) circuits is proposed. This method employs test vectors based on pseudo-random sequences created by an on-chip high-frequency clock generator (CG) and a linear feedback shift register with parallel outputs (LSPO). Downsamplers (DSMs) at the outputs of a circuit under test (CUT) decimate the CUT output data so that high-frequency testing can be performed at sufficiently low data rates between the CUT and room-temperature electronics. The proposed testing can continuously test the circuit at high frequency with low-cost instruments. All of the critical subsystems, including LSPO, CG, and DSM, were designed, fabricated, and successfully tested. We validated proper operation at up to 40 GHz, confirming the concept and execution.

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