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2017

Research trends and new developments in phase engineering

Yoshikawa, N. 2017 In : IEEJ Transactions on Fundamentals and Materials. 137, 1, p. 23-25 3 p.

Research output: Contribution to journalArticle

Superconducting materials
Electrons
2016
Fluxes
Inductance
Logic circuits
Excited states
Superconducting materials

Demonstration of 10k gate-scale adiabatic-quantum-flux-parametron circuits

Narama, T., Yamanashi, Y., Yoshikawa, N., Takeuchi, N. & Ortlepp, T. 2016 Jan 14 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383438

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fluxes
Superconducting materials
Energy dissipation
Demonstrations
Fluxes
Flip flop circuits

Design and high-speed component tests of an SFQ FFT processor using the 10 kA/cm2 Nb advanced process

Sakashita, Y., Ono, T., Yamanashi, Y. & Yoshikawa, N. 2016 Jan 14 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383442

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fast Fourier transforms
Fluxes
ROM
Logic circuits

Design of an extremely energy-efficient hardware algorithm using adiabatic superconductor logic

Xu, Q., Yamanashi, Y., Yoshikawa, N., Ayala, C. L., Takeuchi, N. & Ortlepp, T. 2016 Jan 14 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383446

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hardware
Superconducting materials
Energy efficiency
Energy dissipation
Semiconductor materials

Development of bit-serial RSFQ microprocessors integrated with shift-register-based random access memories

Tanaka, M., Takata, K., Sato, R., Fujimaki, A., Kawaguchi, T., Ando, Y., Takagi, K., Takagi, N. & Yoshikawa, N. 2016 Jan 14 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383449

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microprocessor chips
Fluxes
Shift registers
Hardware
Clocks

Grounding methods to reduce stray coupling in multilayer layouts

Fourie, C. J., Miyanishi, S. & Yoshikawa, N. 2016 Jan 14 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383461

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Multilayers
Inductance
Integrated circuit layout
Electric grounding
Tile

Guest Editorial

Fujimaki, A., Tanaka, S., Yoshikawa, N. & Miller, D. 2016 Aug 1 In : IEEE Transactions on Applied Superconductivity. 26, 5, 7517307

Research output: Contribution to journalEditorial

Electronic equipment
Magnetoelectronics
Refrigerators
SQUIDs
Superconducting materials
Fluxes
Computer hardware description languages
Adders
Finite automata
Fabrication

High-speed demonstration of low-power 1 k-bit shift-register memories using LR-biasing SFQ circuits

Takahashi, T., Numaguchi, R., Yamanashi, Y. & Yoshikawa, N. 2016 Mar 16 In : IEICE Electronics Express. 13, 6

Research output: Contribution to journalArticle

Shift registers
Electric power utilization
Bias currents
Inductance
Microprocessor chips

Improvement of energy efficiency of 64-kb Josephson-CMOS hybrid memories

Konno, G., Sasaki, Y., Yamanashi, Y. & Yoshikawa, N. 2016 Jan 14 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383463

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electric power utilization
Random access storage
Energy efficiency
Fluxes
Sensors
Bias currents
Electric lines
Fluxes
Shift registers
Recovery
SQUIDs
Energy dissipation
Thermal noise
Circuit simulation
Analog circuits

Preface

Fujimaki, A., Tanaka, S. & Yoshikawa, N. 2016 Jan 14 In : Unknown Journal. 7383422

Research output: Contribution to journalEditorial

Digital circuits
Integrated circuits
Fluxes
Logic circuits
Timing jitter
Thermal noise
Shift registers

Study of signal interface between single flux quantum circuit and adiabatic quantum flux parametron

China, F., Narama, T., Takeuchi, N., Yamanashi, Y., Yoshikawa, N. & Ortlepp, T. 2016 Jan 14 2015 15th International Superconductive Electronics Conference, ISEC 2015. Institute of Electrical and Electronics Engineers Inc., 7383483

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fluxes
Magnetic flux
Hybrid systems
Electric lines

Toward the creation of future technologies based on superconductivity

Yoshikawa, N. 2016 Jan 1 In : IEEJ Transactions on Fundamentals and Materials. 136, 1, p. 18-20 3 p.

Research output: Contribution to journalArticle

Superconducting devices
Superconductivity
Superconducting materials
2015
2 Citations
Fast Fourier transforms
Fluxes
Demonstrations
7 Citations
Fluxes
Electric wiring
Logic design
Magnetic couplings
Logic circuits
1 Citations

Demonstration of bit-serial SFQ-based computing for integer iteration algorithms

Xu, Q., Peng, X., Ortlepp, T., Yamanashi, Y. & Yoshikawa, N. 2015 Jun 1 In : IEEE Transactions on Applied Superconductivity. 25, 3, 6967746

Research output: Contribution to journalArticle

Clocks
Electric power utilization
Fluxes
Energy efficiency
Demonstrations
Fluxes
Detectors
Ions
Mass spectrometry
Discriminators
1 Citations
Superconducting materials
Fluxes
Digital circuits
Demonstrations
Magnetic couplings
Fluxes
Logic gates
Adders
Logic circuits
Boolean functions
2 Citations

Energy efficiency of adiabatic superconductor logic

Takeuchi, N., Yamanashi, Y. & Yoshikawa, N. 2015 Jan 1 In : Superconductor Science and Technology. 28, 1, 015003

Research output: Contribution to journalArticle

Superconducting materials
Energy efficiency
Temperature
Scaling laws
Thermal energy

Experimental demonstration of quantum-flux-latch-based circuits

Takeuchi, N., Ortlepp, T., Yamanashi, Y. & Yoshikawa, N. 2015 Jun 1 In : IEEE Transactions on Applied Superconductivity. 25, 3, 6967740

Research output: Contribution to journalArticle

Fluxes
Flip flop circuits
Energy dissipation
Adders
Schematic diagrams

Fast and accurate inductance and coupling calculation for a multi-layer Nb process

Fourie, C. J., Takahashi, A. & Yoshikawa, N. 2015 Mar 1 In : Superconductor Science and Technology. 28, 3, 035013

Research output: Contribution to journalArticle

Inductance
Electric wiring
Quantum electronics
Shielding
Gages
1 Citations

High-speed demonstration of bit-serial floating-point adders and multipliers using single-flux-quantum circuits

Peng, X., Xu, Q., Kato, T., Yamanashi, Y., Yoshikawa, N., Fujimaki, A., Takagi, N., Takagi, K. & Hidaka, M. 2015 Jun 1 In : IEEE Transactions on Applied Superconductivity. 25, 3, 6990569

Research output: Contribution to journalArticle

Fluxes
Adders
Clocks
Network routing
Energy efficiency
1 Citations
Fast Fourier transforms
Clocks
Energy dissipation
Fluxes
Merging
Fluxes
Circuit simulation
SQUIDs
Electric lines
1 Citations

Inductance and coupling of stacked vias in a multilayer superconductive IC process

Fourie, C. J., Peng, X., Numaguchi, R. & Yoshikawa, N. 2015 Jun 1 In : IEEE Transactions on Applied Superconductivity. 25, 3, 6975060

Research output: Contribution to journalArticle

Inductance
SQUIDs
Integrated circuits
Multilayers
Modulation

Magnetically coupled quantum-flux-latch with wide operation margins

Tsuji, N., Takeuchi, N., Narama, T., Ortlepp, T., Yamanashi, Y. & Yoshikawa, N. 2015 Sep 29 In : Superconductor Science and Technology. 28, 11, 115013

Research output: Contribution to journalArticle

Fluxes
Superconducting materials
1 Citations
Superconducting materials
Energy dissipation
Temperature
Thermal noise
Logic gates
2014
2 Citations

A reconfigurable data-path accelerator based on single flux quantum circuits

Kataoka, H., Honda, H., Mehdipour, F., Yoshikawa, N., Fujimaki, A., Akaike, H., Takagi, N. & Murakami, K. 2014 Mar 13 In : IEICE Transactions on Electronics. E97-C, 3, p. 141-148 8 p.

Research output: Contribution to journalArticle

Fluxes
Particle accelerators
Logic circuits
Application programs
Specifications
4 Citations
Fluxes
Timing jitter
Mass spectrometry
Clocks
Microwave oscillators
1 Citations
Magnetic fields
Fluxes
Flip flop circuits
Electric wiring
Sensor arrays
7 Citations

Design and high-speed demonstration of single-flux-quantum bit-serial floating-point multipliers using a 10 kA/cm2 Nb process

Peng, X., Yamanashi, Y., Yoshikawa, N., Fujimaki, A., Takagi, N., Takagi, K. & Hidaka, M. 2014 Mar 13 In : IEICE Transactions on Electronics. E97-C, 3, p. 188-193 6 p.

Research output: Contribution to journalArticle

Electric power utilization
Systolic arrays
Clocks
Demonstrations
Fluxes
5 Citations
Fluxes
Flip flop circuits
Demonstrations
9 Citations

Large-scale integrated circuit design based on a Nb nine-layer structure for reconfigurable data-path processors

Fujimaki, A., Tanaka, M., Kasagi, R., Takagi, K., Okada, M., Hayakawa, Y., Takata, K., Akaike, H., Yoshikawa, N., Nagasawa, S., Takagi, K. & Takagi, N. 2014 Mar 13 In : IEICE Transactions on Electronics. E97-C, 3, p. 157-165 9 p.

Research output: Contribution to journalArticle

Logic gates
Fluxes
Integrated circuit design
Administrative data processing
Strip telecommunication lines
26 Citations

Nb 9-layer fabrication process for superconducting large-scale SFQ circuits and its process evaluation

Nagasawa, S., Hinode, K., Satoh, T., Hidaka, M., Akaike, H., Fujimaki, A., Yoshikawa, N., Takagi, K. & Takagi, N. 2014 Mar 13 In : IEICE Transactions on Electronics. E97-C, 3, p. 132-140 9 p.

Research output: Contribution to journalArticle

Fabrication
Defects
Shift registers
Fluxes
Electric wiring
7 Citations

Novel latch for adiabatic quantum-flux-parametron logic

Takeuchi, N., Ortlepp, T., Yamanashi, Y. & Yoshikawa, N. 2014 Mar 14 In : Journal of Applied Physics. 115, 10, 103910

Research output: Contribution to journalArticle

Fluxes
Shift registers
Logic gates
Flip flop circuits
Clocks
Electric power utilization
Logic circuits
Integrated circuits
Energy utilization
Fluxes
1 Citations

Reduction of the jitter of single-flux-quantum time-to-digital converters for time-of-flight mass spectrometry

Sano, K., Muramatsu, Y., Yamanashi, Y., Yoshikawa, N., Zen, N. & Ohkubo, M. 2014 Sep 15 In : Physica C: Superconductivity and its Applications. 504, p. 97-101 5 p.

Research output: Contribution to journalArticle

Jitter
Fluxes
Mass spectrometry
Clocks
Bias currents
3 Citations

Reversible computing using adiabatic superconductor logic

Takeuchi, N., Yamanashi, Y. & Yoshikawa, N. 2014 Jan 1 Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). Springer Verlag, Vol. 8507 LNCS, p. 15-25 11 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 8507 LNCS)

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fluxes
Energy dissipation
Superconducting materials
Potential energy
Energy efficiency
10 Citations
Logic gates
Energy dissipation
Superconducting devices
Logic devices
Entropy
1 Citations
Fluxes
Critical currents
Circuit simulation
Inductance
Integrated circuits
2013
7 Citations

16-Bit wave-pipelined sparse-tree RSFQ adder

Dorojevets, M., Ayala, C. L., Yoshikawa, N. & Fujimaki, A. 2013 Jan 28 In : IEEE Transactions on Applied Superconductivity. 23, 3, 6380540

Research output: Contribution to journalArticle

Adders
Bias voltage
Superconducting materials
Energy efficiency
Fluxes

60-GHz demonstration of an SFQ half-precision bit-serial floating-point adder using 10 kA/cm2 Nb process

Kato, T., Yamanashi, Y., Yoshikawa, N., Fujimaki, A., Takagi, N., Takagi, K. & Nagasawa, S. 2013 Oct 16 2013 IEEE 14th InternationalSuperconductive Electronics Conference, ISEC 2013. 6604272

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Adders
Fluxes
Electric power utilization
Demonstrations
Metals
7 Citations

8-bit asynchronous sparse-tree superconductor RSFQ arithmetic-logic unit with a rich set of operations

Dorojevets, M., Ayala, C. L., Yoshikawa, N. & Fujimaki, A. 2013 Jan 1 In : IEEE Transactions on Applied Superconductivity. 23, 3, 6359777

Research output: Contribution to journalArticle

Fluxes
Bias voltage
Testing
Superconductivity
Superconducting materials