[論文] Execution of Stored Programs by a Rapid Single-Flux-Quantum Random-Access-Memory-Embedded Bit-Serial Microprocessor Using 50-GHz Clock Frequency
8bitの超伝導マイクロプロセッサとメモリをワンチップに集積し、50GHzのクロック周波数を用いてプログラム実行をデモしました。
このチップは、超伝導ループ内の磁束量子の有無を「0」・「1」として信号処理を行うディジタル回路で、約11,000個のジョセフソン素子が集積されています。本報告は、Applied Physics Letterの特集「Advances in Superconducting Logic」の論文として採録されました。
Demonstration of stored-program computing using 50-GHz clock frequency was achieved by a superconductor 8-bit microprocessor and memory integrated on a single chip. The paper has been accepted for publication in Applied Physics Letter, as a part of special collection, “Advances in Superconducting Logic.”
The die photo of the single-flux-quantum microprocessor with embedded memory banks. The test chip was fabricated using the 9-Nb-layer process in the CRAVITY, Advanced Industrial Science and Technology, Japan. It was made up of 11,000 Josephson junctions.
発表論文 Publication
M. Tanaka, R. Sato, A. Fujimaki, K. Takagi, and N. Takagi, “Execution of stored programs by a rapid single-flux-quantum random-access-memory-embedded bit-serial microprocessor using 50-GHz clock frequency,” Applied Physics Letter, vol. 122, no. 19, art. no. 192601, May 2023.
doi: 10.1063/5.0148273