Design and implementation of control system for superconducting RSFQ circuit

The superconducting rapid single flux quantum(RSFQ) integrated circuit is a promising solution for overcoming speed and power bottlenecks in high-performance computing systems in the postMoore era. This paper presents an architecture designed to improve the speed and power limitations of high-performance computing systems using superconducting technology. Since superconducting microprocessors, which operate at cryogenic temperatures, require support from semiconductor circuits, the proposed design utilizes the von Neumann architecture with a superconducting RSFQ microprocessor, cryogenic semiconductor memory, a room temperature field programmable gate array(FPGA) controller, and a host computer for input/output. Additionally, the paper introduces two key circuit designs: a start/stop controllable superconducting clock generator and an asynchronous communication interface between the RSFQ and semiconductor chips used to implement the control system. Experimental results demonstrate that the proposed design is feasible and effective, providing valuable insights for future superconducting computer systems.