Workshop

Major Publications

FY2009

Journal Papers

Invited Talk

  • Farhad Mehdipour, Hiroaki Honda, Hiroshi Kataoka, Koji Inoue, Kazuaki Murakami (Kyushu Univ.): "Optimizing the Architectures of SFQ-RDP (Single Flux Quantum- Reconfigurable Datapath)," Superconducting SFQ VLSI Workshop 2009 (SSV2009), I2, Kyushu University School of Medicine, Fukuoka, Japan, June. 15, 2009.
  • Akira Fujimaki, Ryo Kasagi, Katsumi Takagi, Irina Kataeva, Hiroyuki Akaike, Masamitsu Tanaka, Naofumi Takagi (Nagoya Univ.), Nobuyuki Yoshikawa (Yokohama National Univ.), Kazuaki Murakami (Kyushu Univ.): "Demonstration of 2x3 Reconfigurable-data-path Processors with 14000 Josephson Junctions," International Superconductive Electronics Conference 2009 (ISEC'09), SP-O4, Fukuoka. Japan, June 17, 2009.

International Conference/Workshop

  • Kazuyoshi Takagi, Yuki Ito, Masamitsu Tanaka and Naofumi Takagi (Nagoya Univ.): "A Method for Layout-Driven Skewed Clock Tree Synthesis for SFQ Circuits," Superconducting SFQ VLSI Workshop 2009 (SSV2009), O1, Kyushu University School of Medicine, Fukuoka, Japan, June. 15, 2009.
  • Masamitsu Tanaka, Kazuyoshi Takagi, Naofumi Takagi (Nagoya Univ.), Yuki Yamanashi, Nobuyuki Yoshikawa (Yokohama National Univ.): "High-Throughput Arithmetic Circuits based on Systolic Architecture for SFQ Reconfigurable Data-Path," Superconducting SFQ VLSI Workshop 2009 (SSV2009), O4, Kyushu University School of Medicine, Fukuoka, Japan, June. 15, 2009.
  • Irina Kataeva, Hiroyuki Akaike, Akira Fujimaki (Nagoya Univ.), Nobuyuki Yoshikawa (Yokohama National Univ.), Naofumi Takagi (Nagoya Univ.): "A Crossbar Switch for Routing of 2-bit Wide Data Streams," Superconducting SFQ VLSI Workshop 2009 (SSV2009), O5, Kyushu University School of Medicine, Fukuoka, Japan, June. 15, 2009.
  • Y. Yamanashi, T. Kainuma, M. Igarashi, H. Hara, K. Taketomi, H. Park, H. Suzuki, Y.Natsume, N. Yoshikawa, H. Akaike, M. Tanaka, K. Takagi, I. Kataeva, R. Kasagi, M. Itoh, A.Fujimaki, S. Nagasawa, M. Hidaka: "100 GHz Demonstrations Based on the Single-Flux-Quantum Cell Library for the 10 kA/cm2 Nb Multi-Layer Process," International Superconductive Electronics Conference 2009 (ISEC'09), SP-O6, Fukuoka. Japan, June 17, 2009.
  • Naofumi Takagi, Masamitsu Tanaka, Kazuyoshi Takagi: "Hardware Algorithms for SFQ Arithmetic Circuits," International Superconductive Electronics Conference 2009 (ISEC'09), STO3, Fukuoka. Japan, June 18, 2009.
  • Yuki Nagai, Ryohei Kanada, Hiroyuki Akaike, Akira Fujimaki: "Preparation Process of Plasma-Nitrided Barriers in NbN Josephson Junctions for Digital Applications," International Superconductive Electronics Conference 2009 (ISEC'09), TD-O6, Fukuoka. Japan, June 19, 2009.

FY2008

Journal Papers

  • F. Mehdipour, H. Noori, H. Honda, K. Inoue, and K. J. Murakami, "A gravity-directed temporal partitioning approach," IEICE Electronics Express, vol. 5, no. 10, pp. 366-373, May 2008.
  • K. Nakamiya, N. Yoshikawa, A. Fujimaki, H. Terai, Y. Hashimoto, "Direct measurements of propagation delay of single-flux-quantum circuits by time-to-digital converters," IEICE Electronics Express, vol. 5, no. 9, pp.332-337, May 2008.
  • H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, A. Fujimaki, N. Takagi, "Novel serial-parallel converter using SFQ logic circuits," Physica C, vol. 468, pp. 1977-1982, Sep. 2008.
  • M. Tanaka, K. Obata, K. Takagi, N. Takagi, A. Fujimaki, N. Yoshikawa, "A high-throughput single-flux-quantum floating-point serial divider using the signed-digit representation," IEEE Trans. Appl. Supercond., accepted.
  • I. Kataeva, H. Akaike, A. Fujimaki, N. Yoshikawa, N. Takagi, K. Inoue, H. Honda, K. Murakami, "An Operand Routing Network for an SFQ Reconfigurable Data-Paths Processor," IEEE Trans. Appl. Supercond., accepted.
  • K. Takagi, M. Tanaka, S. Iwasaki, R. Kasagi, S. Nagasawa, T. Satoh, H. Akaike, A. Fujimaki, "SFQ Propagation Properties in Passive Transmission Lines Based on a 10-Nb-Layers Structure," IEEE Trans. Appl. Supercond., accepted.
  • H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, M. Tanaka, K. Obata, Y. Itou, A. Fujimaki, N. Takagi, K. Takagi, S. Nagasawa, "Design and implementation of SFQ half-precision floating-point adders," IEEE Trans. Appl. Supercond., accepted.
  • T. Satoh, K. Hinode, S. Nagasawa, Y. Kitagawa, M. Hidaka, N. Yoshikawa, H. Akaike, A. Fujimaki, K. Takagi, N. Takagi, " Planarization Process for Fabricating Multi-layer Nb Integrated Circuits Incorporating Top Active Layer," IEEE Trans. Appl. Supercond., accepted.
  • K. Fujiwara, S. Nagasawa, Y. Hashimoto, M. Hidaka, N. Yoshikawa, M. Tanaka, H. Akaike, A. Fujimaki, K. Takagi, and N. Takagi, "Research on Effective Moat Configuration for Nb Multi-Layer Device Structure," IEEE Trans. Appl. Supercond., accepted.
  • H. Akaike, M. Tanaka, K. Takagi, I. Kataeva, R. Kasagi, A. Fujimaki, K. Takagi, M. Igarashi, H. Park, Y. Yamanashi, N. Yoshikawa, K. Fujiwara, S. Nagasawa, M. Hidaka, and N. Takagi, "Design of Single Flux Quantum cells for a 10-Nb-layer process," Physica C., accepted.
  • M. Tanaka, H. Akaike, A. Fujimaki, "Control of return currents in the single-flux-quantum circuits using positive/negative bias supply lines," Physica C., accepted.
  • .S. Nagasawa, T. Satoh, K. Hinode, Y. Kitagawa, M. Hidaka, H. Akaike, A. Fujimaki, K. Takagi, N. Takagi, N. Yoshikawa, "New Nb multi-layer Fabrication Process for Large-Scale SFQ Circuits," Physica C, accepted.
  • H. Hara, H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, K. Obata, M. Tanaka, N. Takagi, K. Takagi, A. Fujimaki, S. Nagasawa, "Design and Implementation of SFQ Half-Precision Floating-Point Multipliers," IEEE Trans. Appl. Supercond., accepted.
  • H. Akaike, K. Shigehara, A. Fujimaki, T. Satoh, K. Hinode, S. Nagasawa, M. Hidaka, "The Effects of a DC Power Layer in a 10-Nb-Layer Device for SFQ LSIs," IEEE Trans. Appl. Supercond., accepted.

Invited Talk

  • N. Yoshikawa, "RSFQ projects in Japan," 5th FLUXONICS RSFQ design workshop, Ilmenau , Jun 2008.
  • A. Fujimaki, S. Iwasaki, K. Takagi, R. Kasagi, I. Kataeva, H. Akaike, M. Tanaka, N. Takagi, N. Yoshikawa, K. Murakami, "Demonstration of an SFQ-Based Accelerator Prototype for a High-Performance Computer," 2008 Applied Superconductivity Conference (ASC 2008), 2EZ01, Chicago, Aug 2008.
  • H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, M. Tanaka, K. Obata, Y. Itou, A. Fujimaki, N. Takagi, K. Takagi, S. Nagasawa, "Design and Implementation of SFQ Half-Precision Floating-Point Adders," 2008 Applied Superconductivity Conference (ASC 2008), 4EB01, Chicago, August 2008.
  • F. Mehdipour, H. Noori, H. Honda, K. Inoue, and K. J. Murakami, "Performance Evaluation of a Reconfigurable Instruction Set Processor," International SoC Design Conference (ISOCC 2008), Busan, Nov 2008.
  • S. Nagasawa, T. Satoh, K. Hinode, Y. Kitagawa, M. Hidaka, H. Akaike, A. Fujimaki, K. Takagi, N. Takagi, N. Yoshikawa, "New Nb multi-layer Fabrication Process for Large-Scale SFQ Circuits," International Symposium on Superconductivity 2008 (ISS 2008), FD-22-INV, Tsukuba, Oct 2008.
  • 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, "Recent development of Large-Scale reconfigurable data-paths using RSFQ Circuits," 21th International Symposium on Superconductivity (ISS2008), FD-25-INV, Tsukuba, Oct 2008.

International Conference/Workshop

  • M. Tanaka, K. Obata, K. Takagi, N. Takagi, A. Fujimaki, N. Yoshikawa, "A high-throughput single-flux-quantum floating-point serial divider using the signed-digit representation," 2008 Applied Superconductivity Conference (ASC 2008), 2EZ02, Chicago, August 2008.
  • H. Hara, H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, K. Obata, M. Tanaka, N. Takagi, K. Takagi, A. Fujimaki, S. Nagasawa, "Design and Implementation of SFQ Half-Precision Floating-Point Multipliers," 2008 Applied Superconductivity Conference (ASC 2008), 2EZ03, Chicago, August 2008.
  • I. Kataeva, H. Akaike, A. Fujimaki, N. Takagi, N. Yoshikawa, K. Inoue, H. Honda, K. Murakami, "An Operand Routing Network for an SFQ Reconfigurable Data-Paths Processor," 2008 Applied Superconductivity Conference (ASC 2008), 2EZ07, Chicago, August 2008.
  • M. Tanaka, H. Akaike, A. Fujimaki, "Control of return currents in the single-flux-quantum circuits using positive/negative bias supply lines," 21th International Symposium on Superconductivity (ISS2008), FD-26, Tsukuba, Oct 2008.
  • F. Mehdipour, H. Noori, B. Javadi, H. Honda, K. Inoue, and K. Murakami, "A combined analytical and simulation-based model for performance evaluation of a reconfigurable instruction set processor," The 14th Asia and South-Pacific Design Automation Conference (ASPDAC 2009), pp.564-569, Jan. 2009.

FY2007

Journal Papers

  • F. Mehdipour, H. Noori, M. S. Zamani, K. Inoue, and K. Murakami: "Improving Performance and Energy Saving in a Reconfigurable Processor via Accelerating Control Data Flow Graphs," IEICE Transactions on Information and Systems, vol. E90-D, no.12, pp.1956-1966, Dec. 2007.
  • S. Iwasaki, M. Tanaka, Y. Yamanashi, H. Park, H. Akaike, A. Fujimaki, N. Yoshikawa, N. Takagi, K. Murakami, H. Honda and K. Inoue: "Design of a reconfigurable data-path prototype in the single-flux-quantum circuit," Superconductor Science and Technology, vol. 20, no. 11, pp. S328-S331, Nov. 2007.
  • H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, A. Fujimaki, and N. Takagi, " Novel Serial-Parallel Converter Using SFQ Logic Circuits," Physica C (to be published).
  • H. Akaike, A. Fujimaki, S. Nagasawa, Y. Kitagawa, and M. Hidaka, "Effects of the film thickness of a ground plane in the SFQ circuits with a dc-power layer," Superconductor Science and Technology, vol. 20, no. 11, pp. S336-S340, Nov. 2007.

Invited Talk

  • M. Hidaka, S. Nagasawa, K. Hinode and T. Satoh　(ISTEC)： "Advanced fabrication process for Nb single flux quantum circuits," 11th International Superconductive Electronics Conference (ISEC'07), I-I01, Washington, D.C. USA, June 12, 2007.
  • A. Fujimaki (Nagoya Univ.): "Recent Progress in SFQ LSI Technology," 8th European Conference on Applied Superconductivity (EUCAS’07), Brussels, Belgium, Sept. 2007.
  • A. Fujimaki (Nagoya Univ.): "Superconducting Electronics in Japan," US Workshop on Superconducting Electronics, Lakeville, CT USA., Oct. 2007
  • F. Mehdipour, H. Noori, K. Inoue, and K. Murakami (Kyushu Univ.): "High Performance, Low Power Reconfigurable Processor for Embedded Systems,"　International SoC Design Conference (ISOCC'07), pp.51-55, Oct. 2007.
  • N. Takagi, K. Murakami, A. Fujimaki, N. Yoshikawa, K. Inoue, and H. Honda (Nagoya Univ., Kyushu Univ., Yokohama National Univ.): "A Desk-Side Supercomputer with RSFQ Reconfigurable Data-Paths," 日本学術振興会　超伝導エレクトロニクス第146委員会　創立25周年記念シンポジウム，タワーホール船堀（東京），2007年10月18日
  • N. Yoshikawa (Yokohama National Univ.): "Superconductor Electronics based on Single- Flux-Quantum Circuit Technology," East Asia Symposium on Superconductor Electronics, 11-15 Dec. 2007, Delhi, India.
  • I. Kataeva, S. Iwasaki, H. Akaike, A. Fujimaki, N. Yoshikawa, N. Takagi and K. Murakami (Nagoya Univ., Yokohama National Univ., Kyushu Univ.): "Demonstration of the key components of an SFQ Reconfigurable Data-Paths Processor: an Operand Routing Network and a 2×2 RDP prototype," Superconducting SFQ VLSI Workshop 2008 (SSV2008), I2, Yokohama National University, Yokohama, Japan, Mar. 17, 2008.
  • M. Tanaka, K. Obata, Y. Yamanashi, H. Park, S. Iwasaki, K. Taketomi, K. Takagi, K. Takagi, N. Takagi, A. Fujimaki, and N. Yoshikawa (Nagoya Univ., Yokohama National Univ.): "CORE1: Review and Recent Developments in Bit-serial SFQ Microprocessors," Superconducting SFQ VLSI Workshop 2008 (SSV2008), I3, Yokohama National University, Yokohama, Japan, Mar. 17, 2008.

International Conference/Workshop

  • H.　Akaike, A. Fujimaki, S. Nagasawa, Y. Kitagawa, and M. Hidaka（Nagoya Univ., ISTEC）: "Effects of the film thickness of a ground plane in the SFQ circuits with a dc-power layer," 11th International Superconductive Electronics Conference (ISEC'07), O-A04, Washington, D.C. USA, June 11, 2007.
  • H. Hara, Y. Nobumori, N. Yoshikawa, A. Fujimaki, Y. Hashimoto, and H. Terai (Yokohama National Univ.): "Asynchronous High-Speed Operation of RSFQ First-In First-Out Buffers," 11th International Superconductivity Conference (ISEC'07), O-S03, Washington, D.C. USA, June 13, 2007.
  • H. Park, Y. Yamanashi, K. Taketomi, N. Yoshikawa, A. Fujimaki, and N. Takagi (Yokohama National Univ., Nagoya Univ.): "Fast Bit-Serial Multipliers Using RSFQ Logic Circuits," 11th International Superconductivity Electronics Conference (ISEC'07), O-S04, Washington, D.C. USA, June 13, 2007.
  • F. Mehdipour, H. Noori, M. S. Zamani, K. Inoue, and K. Murakami (Kyushu Univ.): "Design Space Exploration for a Coarse Grain Accelerator," 13th Asia and South Pacific Design Automation Conference (ASPDAC'08), 8B-3, pp.685-690, COEX, Seoul, Korea, Jan. 24, 2008.
  • S. Nagasawa, T. Satoh, K. Hinode, Y. Kitagawa, M. Hidaka, H. Akaike, A. Fujimaki, K. Takagi, N. Takagi, and N. Yoshikawa (ISTEC, Nagoya Univ., Yokohama National Univ.): "New Nb Multi-layer Fabrication Process for Superconducting SFQ VLSI Circuits," Superconducting SFQ VLSI Workshop 2008 (SSV2008), A1-1, Yokohama National University, Yokohama, Japan, Mar. 17, 2008.
  • K. Takagi, N. Takagi, M. Tanaka, K. Obata, and Y. Ito (Nagoya Univ.): "Computer-Aided Design of Superconducting SFQ Digital Circuits," Superconducting SFQ VLSI Workshop 2008 (SSV2008), A2-3, Yokohama National University, Yokohama, Japan, Mar. 17, 2008. &ref(ssv2008_ktakagi.pdf,,Slides);
  • H. Park, Y. Yamanashi, H. Hara, K. Taketomi, N. Yoshikawa, M. Tanaka, K. Obata, Y. Itou, A. Fujimaki, N. Takagi, and K. Takagi (Yokohama National Univ., Nagoya Univ.): "Design and Implementation of the SFQ Floating Point Units," Superconducting SFQ VLSI Workshop 2008 (SSV2008), A2-5, Yokohama National University, Yokohama, Japan, Mar. 17, 2008.
  • H. Honda, H. Kataoka, F. Mehdipour, K. Inoue, and K. Murakami (Kyushu Univ.): "Development and Performance Evaluation of a Large Scale Re-configurable Data Path Processor,"　 Superconducting SFQ VLSI Workshop 2008 (SSV2008), A2-6, Yokohama National University, Yokohama, Japan, Mar. 17, 2008.

FY2006

Invited Talk

  • 高木直史、村上和彰、藤巻朗、吉川信行、井上弘士、本田宏明：「単一磁束量子回路による大規模再構成可能データパスをもつプロセッサ」、電子情報通信学会 超伝導エレクロトニクス研究会、SCE2006-36、超電導工学研究所（東京）、2007年1月26日．
  • 藤巻朗：「単一磁束量子エレクトロニクスの新展開」、電子情報通信学会 超伝導エレクトロニクス研究会、SCE2006-37、超電導工学研究所（東京）、2007年1月26日．

International Conference/Workshop

  • H. Park, Y. Yamanashi, N. Yoshikawa, A. Fujimaki, M. Tanaka, H. Terai, S. Yorozu: "Design of Bit-Slice Adders Using RSFQ Logic Circuits," 2006 Applied Superconductivity Conference (ASC2006), 3EY03, Seattle, Washington, USA, September 2006.
Last-modified: Wed, 20 Jan 2010 10:51:15 JST (5203d)