Development of SFQ Logic Gates Connectable to Passive Transmission Lines and Their Application to Digital Signal Processors

2009 Fiscal Year Final Research Report

• Project/Area Number: 18080005
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Yokohama National University
• Principal Investigator: YOSHIKAWA Nobuyuki Yokohama National University, 大学院・工学研究院, 教授 (70202398)
• Co-Investigator(Kenkyū-buntansha): KANEDA Hisayoshi 国立大学法人横浜国立大学, 大学院・工学研究院, 助手 (30242382)
• Project Period (FY): 2006 – 2009
• Keywords: 局在電磁波 / 単一磁束量子 / SFQ / 単一磁束量子回路 / 超伝導回路 / 低消費電力 / 信号処理回路 / FFT

Research Abstract

Single-flux-quantum (SFQ) integrated circuits, which combine SFQ circuits with loss-less superconducting passive transmission lines (PTLs), have extremely high-speed and low-power abilities. In this study, a technique to connect SFQ logic gates directly with PTLs was studied and a new cell library was developed. It was demonstrated that the junction number and power consumption of SFQ circuits were considerably reduced with this technique. FFT signal processors were also developed based on this technique for their digital-signal-processor application, and their high-speed operation was demonstrated.

Research Products

• [Journal Article] Access Time Measurement of 64-kb Josephson-CMOS Hybrid Memories using SFQ Time-to-Digital Converter (2010)
  • Author(s): Y. Okamoto, H. Jin, K. Yaguchi, Y. Yamanashi, N. Yoshikawa
  • Journal Title: IEICE Electron. Express vol.7 Pages: 320-325
  • Peer Reviewed
• [Journal Article] New delay-time measurements on a 64 kb Josephson-CMOS hybrid memory with 600 ps access time (2010)
  • Author(s): K. Fujiwara, Q. Liu, T. Van Duzer, X. Meng, N. Yoshikawa
  • Journal Title: IEEE Trans. Appl. Superconductivity vol.20 Pages: 14-20
  • Peer Reviewed
• [Journal Article] 3D simulation of superconducting microwave devices with an electromagneticfield simulator (2009)
  • Author(s): N. Takeuchi, Y. Yamanashi, Y. Saito, N. Yoshikawa
  • Journal Title: Physica C vol.469 Pages: 1662-1665
  • Peer Reviewed
• [Journal Article] Design and Implementation of SFQ Half-Precision Floating-Point Adders (2009)
  • Author(s): H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, M. Tanaka, K. Obata, Y. Itou, A. Fujimaki, N. Takagi, K. Takagi, S. Nagasawa
  • Journal Title: IEEE Trans. Appl. Superconductivity vol.19 Pages: 634-639
  • Peer Reviewed
• [Journal Article] SFQ pulse transfer circuits using inductive coupling for current recycling (2009)
  • Author(s): M. Igarashi, K. Churei, N. Yoshikawa, K. Fujiwara, Y. Hashimoto
  • Journal Title: IEEE Trans. Appl. Superconductivity vol.19 Pages: 649-652
  • Peer Reviewed
• [Journal Article] Direct measurements of propagation delay of single-flux-quantum circuits by time-to-digital converters (2008)
  • Author(s): K. Nakamiya, N. Yoshikawa, A. Fujimaki, H. Terai, Y. Hashimoto
  • Journal Title: IEICE Electronics Express Vol.5,No.9 Pages: 332-337
  • Peer Reviewed
• [Journal Article] 単一磁束量子回路を用いた超高速マイクロプロセッサの開発とその展望 (2008)
  • Author(s): 吉川信行
  • Journal Title: 電子情報通信学会論文誌C vol.J91-C Pages: 183-193
  • Peer Reviewed
• [Journal Article] Design and Implementation of a Pipelined Bit-Serial SFQ Microprocessor, CORE1beta (2007)
  • Author(s): Y. Yamanashi, M. Tanaka, A. Akimoto, H. Park, Y. Kamiya, N. Irie, N. Yoshikawa, A. Fujimaki, H. Terai, Y. Hashimoto
  • Journal Title: IEEE Trans. Applied Superconductivity vol.17 Pages: 474-477
  • Peer Reviewed
• [Journal Article] Study of LR-Loading Technique for Low-Power Single Flux Quantum Circuits (2007)
  • Author(s): Y. Yamanashi, T. Nishigai, N. Yoshikawa
  • Journal Title: IEEE Trans. Applied Superconductivity vol.17 Pages: 150-153
  • Peer Reviewed
• [Journal Article] Bit-Error-Rate Measurements of RSFQ Shift Register Memories (2007)
  • Author(s): T. Hikida, K. Fujiwara, N. Yoshikawa, A. Fujimaki, H. Terai, S. Yorozu
  • Journal Title: IEEE Trans. Applied Superconductivity vol.17 Pages: 512-515
  • Peer Reviewed
• [Journal Article] Design and Implementation of a Fully Asynchronous SFQ Microprocessor: SCRAM2 (2007)
  • Author(s): Y. Nobumori, T. Nishigai, K. Nakamiya, N. Yoshikawa, A. Fujimaki, H. Terai, S. Yorozu
  • Journal Title: IEEE Trans. Applied Superconductivity vol.17 Pages: 478-481
  • Peer Reviewed
• [Journal Article] A new design approach for control circuits of pipelined single-flux-quantum microprocessors (2006)
  • Author(s): Y. Yamanashi, A. Akimoto, N. Yoshikawa, M. Tanaka, T. Kawamoto, Y. Kamiya, A. Fujimaki, H. Terai, S. Yorozu
  • Journal Title: Supercond. Sci. Technol. 19 Pages: S340-S343
  • Peer Reviewed
• [Journal Article] Access time measurements of Josephson-CMOS hybrid memory using single-flux-quantum circuits (2006)
  • Author(s): N. Yoshikawa, M. Tokuda1, T. Tomida, H. Kojima, K. Fujiwara, Q. Liu, T. Van Duzer
  • Journal Title: Supercond. Sci. Technol. 19 Pages: S350-S353
  • Peer Reviewed
• [Presentation] Development of SFQ Logic Gates Connectable to Passive Transmission Lines and Their Application to Digital Signal Processors (2010)
  • Author(s): N. Yoshikawa, H. Suzuki, K. Taketomi, Y. Yamanashi
  • Organizer: Proceedings of Superconducting SFQ VLSI Workshop (SSV 2010)
  • Place of Presentation: Yokohama National University, Yokohama
  • Year and Date: 2010-06-13
• [Presentation] (Invited) High-Speed Floating-Point Processors based on Single-Flux-Quantum Circuit Technology (2009)
  • Author(s): N. Yoshikawa, T. Kainuma, H. Park, Y. Yamanashi, A. Fujimaki, N. Takagi, K. Takagi
  • Organizer: Asian Conference of Applied Superconductivity and Cryogenics (ACASC 2009)
  • Place of Presentation: Matsue, Japan
  • Year and Date: 20091206-20091208
• [Presentation] (Invited) Component Design and Test of 50-GHz Half-Precision Floating-Point Adders and Multipliers (2009)
  • Author(s): N. Yoshikawa, T. Kainuma, H. Park, Y. Yamanashi, A. Fujimaki, N. Takagi, K. Takagi
  • Organizer: EUROFLUX 2009 International Conference
  • Place of Presentation: Avignon, France
  • Year and Date: 20090920-20090923
• [Presentation] (Invited) Recent Research Activities in the MEXT SFQ Project (2009)
  • Author(s): N. Yoshikawa
  • Organizer: Technical Program of Superconducting SFQ VLSI Workshop (SSV 2009)
  • Place of Presentation: Kyushu University School of Medicine
  • Year and Date: 2009-06-16
• [Presentation] (Invited) Recent development of Large-Scale reconfigurable data-paths using RSFQ Circuits (2008)
  • Author(s): N. Yoshikawa, H. Park, H. Hara, K. Taketomi, Y. Yamanashi, I. Kataeva, R. Kasagi, S. Iwasaki, H. Akaike, A. Fujimaki, M. Tanaka, K. Obata, Y. Ito, K. Takagi, N. Takagi, H. Honda, K. Inoue, K. Murakami, S. Nagasawa, M. Hidaka
  • Organizer: Abstracts on 21st International Symposium on Superconductivity (ISS2008)
  • Place of Presentation: Tsukuba
  • Year and Date: 20081027-20081029
• [Presentation] (Invited) Design and Implementation of SFQ Half-Precision Floating-Point Adders (2008)
  • Author(s): H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, M. Tanaka, K. Obata, Y. Itou, A. Fujimaki, N. Takagi, K. Takagi, S. Nagasawa
  • Organizer: 2008 Applied Superconductivity Conference (ASC 2008)
  • Place of Presentation: Chicago
  • Year and Date: 20080817-20080822
• [Presentation] (Invited) RSFQ projects in Japan (2008)
  • Author(s): N. Yoshikawa
  • Organizer: 5th FLUXONICS RSFQ design workshop
  • Place of Presentation: Ilmenau
  • Year and Date: 2008-06-29
• [Presentation] Development of SFQ Logic Gated with Passive Transmission lines and Their Application to Digital Signal Processors (2008)
  • Author(s): N. Yoshikawa
  • Organizer: Superconducting SFQ VLSI Workshop 2008
  • Place of Presentation: Yokohama National University, Japan
  • Year and Date: 2008-03-14
• [Presentation] (Invited) Superconductor Electronics based on Single-Flux-Quantum Circuit Technology (2007)
  • Author(s): N. Yoshikawa
  • Organizer: East Asia Symposium on Superconductor Electronics (EASSE2007)
  • Place of Presentation: Delhi, India
  • Year and Date: 20071211-20071215
• [Presentation] (Invited) Review of the CORE1 Microprocessor Project: Recent Development and Next Plans (2007)
  • Author(s): N. Yoshikawa, M. Tanaka, Y. Yamanashi, N. Irie, H. Park, S. Iwasaki, K. Taketomi, A. Fujimaki, H. Terai, S. Yorozu
  • Organizer: Extended Abstract of 11th International Superconductivity Electronics Conference
  • Place of Presentation: Washington DC, USA
  • Year and Date: 20070610-20070614
• [Remarks]
  • URL: http://www.yoshilab.dnj.ynu.ac.jp/jpn/index.html