2025/01/16 by Yasemin Kopur, Kopur, Yasemin, Beyza Zeynep Ucpinar +7
Computer Science · Engineering · #FOS: Physical sciences #Low-power high-performance VLSI design #Parallel Computing and Optimization Techniques #Superconductivity (cond-mat.supr-con) #VLSI and FPGA Design Techniques
paper · pdf · doi:10.48550/arxiv.2501.09449
openalex publication_date 2025/01/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Rapid Single Flux Quantum (RSFQ) circuits are the most evolved superconductor logic family. However, the need to clock each cell and the deep pipeline causes a complex clock network with a large skew. This results in lower throughput and high latency in RSFQ. This work introduces an asynchronous RSFQ cell library that incorporates the α-cell, enabling bidirectional signal paths in RSFQ circuits. The α-cell mitigates the need for a large clock network by allowing reverse signal flow, minimizing routing, and enabling compact circuit designs. We demonstrate the library's reliability and efficiency by analog simulations and using in-house optimization tools. The asynchronous reset RSFQ (AR-SFQ) will enable efficient implementation of scalable, high-performance computing frameworks, such as state machines, neuromorphic computing, and higher fan-in circuits.