Yamanashi Lab.

Publication

Journal Paper

H. Shen, N. Takeuchi, Y. Yamanashi, and N. Yoshikawa, “Design of a Timing Controller for a Superconductor Microwave Switch using Adiabatic Quantum Flux Parametron Circuits,” IEEJ Trans. Electr. Electron. Eng., vol. 142, no. 5, pp. 197-201, May 2022. DOI
Z. Li, Y. Yamanashi, and N. Yoshikawa, “Design of Binary Convolution Operation Circuit for Binarized Neural Networks Using Single-Flux-Quantum Circuit,” IEEE Trans. Appl. Supercond., vol. 32, no. 4, 1300305, Jun. 2022. DOI YNU-Repository
H. He, Y. Yamanashi, and N. Yoshikawa, “Implementing a Discrete Hopfield Neural Network Using a Single Flux Quantum Circuit,” IEEE Trans. Appl. Supercond., vol. 32, no. 4, 1300604, Jun. 2022. DOI YNU-Repository
K. Miyake, Y. Yamanashi, and N. Yoshikawa, “Boltzmann machine using superconducting circuits,” IEEE Trans. Appl. Supercond., vol. 32, no. 4, 1700205, Jun. 2022. DOI YNU-Repository
F. China, N. Takeuchi, H. Suzuki, Y. Yamanashi, H. Terai, and N. Yoshikawa, “A high-speed interface based on a Josephson latching driver for adiabatic quantum-flux-parametron logic,” IEICE Trans. Electron., vol. E105-C, no. 6, 264–269, Jun. 2022. DOI
D. Saida, M. Hidaka, K. Imafuku, and Y. Yamanashi, “Factorization by quantum annealing using superconducting flux qubits implementing a multiplier Hamiltonian,” Sci. Rep., vol. 12, 13669, Aug. 2022. DOI
D. Saida, M. Hidaka, K. Miyake, K. Imafuku, and Y. Yamanashi, Superconducting quantum circuit of NOR in quantum annealing,” Sci. Rep., vol. 12, 15894, Sep. 2022. DOI
K. Asai, N. Takeuchi, H. Suzuki, Y. Yamanashi, and N. Yoshikawa, “Transmission Line Effects of Long Gate-to-Gate Interconnections in Adiabatic Quantum-Flux-Parametron Logic Circuits,” IEEE Trans. Appl. Supercond., vol. 32, no. 7, 1301107, Oct. 2022. DOI
D. Takahashi, N. Takeuchi, Y. Yamanashi, and N. Yoshikawa, “Design and Demonstration of a Superconducting Field-Programmable Gate Array using Adiabatic Quantum-Flux-Parametron Logic and Memory,” IEEE Trans. Appl. Supercond., vol. 32, no. 7, 1301207, Oct. 2022. DOI
Y. Hironaka, T. Hosoya, Y. Yamanashi, and N. Yoshikawa, “Demonstration of Single-Flux-Quantum 64-bit Lookup Table with Cryo-CMOS Decoders for Reconfiguration,” IEEE Trans. Appl. Supercond., vol. 32, no. 8, 1301305, Nov. 2022. DOI
T. Hosoya, Y. Yamanashi, and N. Yoshikawa, “Compact Superconducting Lookup Table Composed of Two-Dimensional Memory Cell Array Reconfigured by External DC Control Currents,”IEEE Trans. Appl. Supercond., vol. 31, no. 3, 1300406, Apr. 2021. (Open Access) DOI YNU-Repository
S. Asada, Y. Yamanashi, and N. Yoshikawa, “Demonstration of an efficient single flux quantum logic circuit by introducing a local magnetic flux biasing,” Supercond. Sci. Technol., vol. 34, no. 5, p. 055007, May 2021. DOI YNU-Repository
D. Saida, N. Watase, and Y. Yamanashi, “Characterization of energy potential in tunable rf-SQUIDs with the classical regime toward precise design of superconducting flux qubit,” Jpn. J. Appl. Phys., vol. 60, no. 6, 060906, Jun. 2021. DOI
L. Shirakawa, Y. Yamanashi, and N. Yoshikawa, “Design and Evaluation of 2-bit-input Single-flux-quantum Autocorrelator System for Astronomical Data Analysis,” IEEE Trans. Appl. Supercond., vol. 31, no.5, 1300604, Aug. 2021. DOI YNU-Repository
D. Saida, Y. Yamanashi, M. Hidaka, F. Hirayama, K. Imafuku, S. Nagasawa, and S. Kawabata, “Experimental Demonstrations of Native Implementation of Boolean Logic Hamiltonian in a Superconducting Quantum Annealer,” IEEE Trans. Quantum Eng., vol. 2, 3103508, Aug. 2021. (Open Access) DOI
S. Nagasawa, M. Tanaka, N. Takeuchi, Y. Yamanashi, S. Miyajima, F. China, T. Yamae, K. Yamazaki, Y. Somei, N. Sega, Y. Mizugaki, H. Myoren, H. Terai, M. Hidaka, N. Yoshikawa, and A. Fujimaki, “Planarized Nb 4-Layer Fabrication Process for Superconducting Integrated Circuits and Its Fabricated Device Evaluation,” IEICE Trans. Electron., vol. E104-C, no.9, pp. 435–445, Sep. 2021. DOI
Y. Yamanashi, R. Kinoshita, and N, Yoshikawa, “Frequency synchronization of single flux quantum oscillators,” Supercond. Sci. Technol., vol. 34, no. 10, 105004, Oct. 2021. (Open Access) DOI YNU-Repository
Y. Hironaka, Y. Yamanashi, and N. Yoshikawa, “Demonstration of a Single-Flux-Quantum Microprocessor Operating With Josephson-CMOS Hybrid Memory,” IEEE Trans. Appl. Supercond., vol. 30, no. 7, 1301206, Oct. 2020. DOI
Y. Tsuna, Y. Yamanashi, and N. Yoshikawa, “Investigation of the Effects of 1/f Noise on Superconducting Circuits,” IEEE Trans. Appl. Supercond., vol. 30, no. 7, 1400404, Oct. 2020. DOI YNU-Repoditory
Y. Okuma, N. Takeuchi, Y. Yamanashi, and N. Yoshikawa, “Miniaturization of adiabatic quantum-flux-parametron circuits by adopting offset buffer,” Superconductor. Sci. Technol., vol. 32, no. 6, 065007, Jun. 2019. DOI
(Invited Paper) Y. Yamanashi, S. Nakaishi, and N. Yoshikawa, “Simulation of the Margins in Single Flux Quantum Circuits Containing π-Shifted Josephson Junctions,” IEEE Trans. Appl. Supercond., vol. 29, no. 5, 1301805, Aug. 2019. DOI YNU-Repository
A. Sanada, Y. Yamanashi, and N. Yoshikawa, “Study on Single Flux Quantum Floating-Point Divider Based on Goldschmidt’s Algorithm,” IEEE Trans. Appl. Supercond., vol. 29, no. 5, 13019045, Aug. 2019. DOI YNU-Repository
Y. Tomitsuka, Y. Yamanashi, N. Zen, M. Ohkubo, and N. Yoshikawa, “Demonstration of Picosecond Time Resolution in Double-Oscillator Time-to-Digital Converter using Single-Flux-Quantum Circuits,” IEEE Trans. Appl. Supercond., vol. 29, no. 5, 1301505, Aug. 2019. DOI
Y. Yamanashi, S. Nakaishi, A. Sugiyama, N. Takeuchi, and N. Yoshikawa, “Design methodology of single-flux-quantum flip-flops composed of both 0- and π-shifted Josephson junctions,” Supercond. Sci. Technol., vol. 31, no. 10, 105003, Aug. 2018. (Open Access) DOI YNU-Repository
Y. Yamanashi, H. Imai, and N. Yoshikawa, “Influence of Magnetic Flux Trapped in Moats on Superconducting Integrated Circuit Operation,” IEEE Trans. Appl. Supercond., vol. 28, no. 7, p. 1301105, Oct. 2018. DOI YNU-Repository
Y. Yamanashi, T. Matsushima, N. Takeuchi, N. Yoshikawa, and T. Ortlepp, “Evaluation of Current Sensitivity of Quantum Flux Parametron,” Supercond. Sci. Technol., vol. 30, no. 8, p. 084004, July 2017. DOI YNU-Repository
T. Wakamatsu, Y. Yamanashi, and N. Yoshikawa, “High-Speed Superconductive Decimation Filter for Sigma-Delta Analog to Digital Converter,” J. Phys. Conf. Ser., vol. 871, p. 012068, July 2017. (Open Access) DOI
R. Kihara, Y. Yamanashi, and N. Yoshikawa, “Power Reduction of Josephson Random Access Memory Using Stochastic Resonance,” IEEE Tras. Appl. Supercond., vol. 26, no. 8, p. 1301704, Dec. 2016. DOI YNU-Repository
R. Tsutsumi, K. Sato, Y. Yamanashi, and N. Yoshikawa, “Improvement of Operation Speed of LR-Biased Low-Power Single Flux Quantum Circuits by Introduction of Dynamic Resetting of Bias Currents,” IEEE Tras. Appl. Supercond., vol. 26, no. 8, p. 1301405, Dec. 2016. DOI YNU-Repository
Y. Yamanashi, K. Masubuchi, and N. Yoshikawa, “Statistical Analysis of Error Rate of Large-Scale Single Flux Quantum Logic Circuit by Considering Fluctuation of Timing Parameters,” Physica C, vol. 530, pp. 101-103, Nov. 2016. DOI YNU-Repository
Y. Yamanashi, S. Nishimoto, and N. Yoshikawa, “30 GHz Operation of Single-Flux-Quantum Arithmetic Logic Unit Implemented by Using Dynamically Reconfigurable Gates”, IEICE Trans. Electron., vol. E99-C, no. 6, pp. 692-696, June 2016. DOI YNU-Repository
S. Nishimoto, Y. Yamanashi, and N. Yoshikawa, “Design Method of Single Flux Quantum Logic Circuits Using Dynamically Reconfigurable Logic Gates,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, p. 1301405, Jun. 2015. DOI YNU-Repository
K. Sato, Y. Yamanashi, and N. Yoshikawa, “High Speed Operation of Single Flux Quantum Multiple Input Merger Using a Magnetically Coupled SQUID Stack,” IEEE Trans. Appl. Supercond., vol. 25, no. 3, p. 1301605, Jun. 2015. DOI YNU-Repository
M. Otsubo, Y. Yamanashi, and N. Yoshikawa, “Optimization of SFQ logic gate considering dependence of its signal propagation delay on the bias voltage,” Physics Procedia, vol. 58, pp. 216-219, Sep. 2014. DOI
T. Ortlepp, M. Volkmann, and Y. Yamanashi, “Memory Effect in Balanced Josephson Comparators,” Physica C, vol. 500, pp. 20-24, May 2014. DOI
Y. Yamanashi and N. Yoshikawa, “Design and Evaluation of Magnetic Field Tolerant Single Flux Quantum Circuits for Superconductive Sensing Systems,” IEICE Trans. Electron., vol. E97-C, no. 3, pp. 178-181, Mar. 2014. DOI YNU-Repository
Y. Yamanashi, K. Umeda, and N. Yoshikawa, “Pseudo Sigmoid Function Generator for a Superconductive Neural Network,” IEEE Trans. Appl. Supercond., Vol. 23, no. 3, p. 1701004, Jun. 2013. DOI YNU-Repository
M. Otsubo, Y. Yamanashi, and N. Yoshikawa, “Improvement of Operating Margin of SFQ Circuits by Controlling Dependence of Signal Propagation Time on Bias Voltage,” IEEE Trans. Appl. Supercond., Vol. 23, no. 3, p. 1300504, Jun. 2013. DOI YNU-Repository
K. Aoki, Y. Yamanashi, and N. Yoshikawa, “Multiplexing Techniques of Single Flux Quantum Circuit Based Readout Circuit for a Multi-Channel Sensing System,” IEEE Trans. Appl. Supercond., Vol. 23, no. 3, p. 2500204, Jun. 2013. DOI YNU-Repository
Y. Tsuga, Y. Yamanashi, and N. Yoshikawa, “Asynchronous Digital SQUID Magnetometer with an On-Chip Magnetic Feedback for Improvement of Magnetic Resolution,” IEEE Trans. Appl. Supercond., Vol. 23, no. 3, p. 1601405, Jun. 2013. DOI YNU-Repository
Y. Yamanashi, I. Okawa, and N. Yoshikawa, “Design Approach of Dynamically Reconfigurable Single Flux Quantum Logic Gate,” IEEE Trans. Appl. Supercond., Vol. 21, no. 3, pp. 831-834, Jun. 2011. DOI YNU-Repository
T. Sugiura, Y. Yamanashi, and N. Yoshikawa, “Demonstration of 30 Gbit/s generation of superconductive true random number generator,” IEEE Trans. Appl. Supercond., Vol. 21, no. 3, pp. 843-846, Jun. 2011. DOI YNU-Repository
Y. Yamanashi, K. Umeda, and K. Sai, “Superconductive Combinational Logic Circuit Using Magnetically Coupled SQUID Array,” Physica C, Vol. 470, pp. 1546-1549, Nov. 2010.
Y. Yamanashi, T. Kainuma, N. Yoshikawa, I. Kataeva, H. Akaike, A. Fujimaki, M. Tanaka, N. Takagi, S. Nagasawa, and M. Hidaka, “100 GHz Demonstrations Based on the Single-Flux-Quantum Cell Library for the 10 kA/cm2 Nb Multi-Layer Process,” IEICE Trans. Electronics, Vol. 93-C, no. 4, pp. 440-444, Apr. 2010.
T. Sugiura, Y. Yamanashi, and N. Yoshikawa, “Statistical Evaluation of a Superconductive Physical Random Number Generator” IEICE Trans. Electronics, Vol. 93-C, no. 4, pp. 453-457, Apr. 2010.
Y. Yamanashi and N. Yoshikawa, “Superconductive Random Number Generator Using Thermal Noises in SFQ Circuits,” IEEE Trans. Appl. Supercond., Vol. 19, no. 3, pp. 630-633, Jun. 2009.
Y. Yamanashi, M. Tanaka, A. Akimoto, H. Park, Y. Kamiya, N. Irie, N. Yoshikawa, A. Fujimaki, H. Terai, and Y. Hashimoto, “Design and Implementation of a Pipelined Bit-Serial SFQ Microprocessor, CORE1b,” IEEE Trans. Appl. Supercond., Vol. 17, no. 2, pp. 474-477, Jun. 2007.
Y. Yamanashi, T. Nishigai, and N. Yoshikawa, “Study of LR-Loading Technique for Low-Power Single Flux Quantum Circuits,” IEEE Trans. Appl. Supercond., Vol. 17, no. 2, pp. 150-153, Jun. 2007.
Y. Yamanashi, T. Asano, and N. Yoshikawa, “On-chip Microwave Generator for Manipulation of Superconductive Quantum Bits,” Physica C, Vol. 445-448, pp. 967-970, Jul. 2006.
Y. Yamanashi, A. Akimoto, N. Yoshikawa, M. Tanaka, T. Kawamoto, Y. Kamiya, and A. Fujimaki, “A New Design Approach for Control Circuits of a Pipelined Single-Flux-Quantum Microprocessor,” Supercond. Sci. Technol., Vol. 19, no. 5, pp. S340-S343, Mar. 2006.
Y. Yamanashi, M. Ito, A. Tagami, and N. Yoshikawa, “Observation of Quantized Energy Levels in a Josephson Junction Using SFQ Circuits,” IEEE Trans. Appl. Supercond., Vol. 15, no. 2, pp. 864-867, Jun. 2005.
Y. Yamanashi, M. Ito, A. Tagami, and N. Yoshikawa, “High-speed Measurement Method of Quantized Energy Levels in Josephson Junctions Using SFQ Circuits,” Physica C, Vol. 412-414, part2, pp. 1546-1549, Jul. 2004.

International Conference

Y. Yamanashi, “Performance Improvement of Superconducting Circuit by Introducing pi-Shifted Josephson Junctions,” 32nd International Superconductivity Symposium (ISS 2019), Kyoto, Dec. 2019. (Invited)
Z. Li, Y. Yamanashi, and N. Yoshikawa, “Single-Flux-Quantum Parallel Multiplier Using Accumulator Unit” 32nd International Superconductivity Symposium (ISS 2019), Kyoto, Dec. 2019.
Y. Tsuna, Y. Yamanashi, and N. Yoshikawa, “Numerical and Experimental Analysis of Influences of 1/ f noises on Superconducting Integrated Circuits,” 32nd International Superconductivity Symposium (ISS 2019), Kyoto, Dec. 2019.
L. Shirakawa, Y. Yamanashi, and N. Yoshikawa, “Design and evaluation of multi-bit-input single-flux-quantum autocorrelator system for astronomical data analysis,” 32nd International Superconductivity Symposium (ISS 2019), Kyoto, Dec. 2019.
D. Saida, M. Maezawa, S. Nagasawa, M. Hidaka, K. Inomata, K. Makise, H. Yamamori, M. Ukibe, S. Kawabata, and Y. Yamanashi, “The Superconducting Flux Qubit for Prime Factorization Utilizing Low Jc Process,” 32nd International Superconductivity Symposium (ISS 2019), Kyoto, Dec. 2019.
N. Watase, D. Saida, and Y. Yamanashi, “Investigation of the superconducting flux qubit for quantum annealing utilizing multi-layered Nb/AlOx/Nb Josephson junction technology,” 32nd International Superconductivity Symposium (ISS 2019), Kyoto, Dec. 2019.
Y. Tsuna, Y. Yamanashi, and N. Yoshikawa, “Investigation of the effects of 1/f noise on superconducting circuits,” International Superconductive Electronics Conference (ISEC) 2019, Riverside, US, Jul. 2019.
D. Saida, Y. Yamanashi, and N. Watase, “Theoretical and Experimental Characterization of Fundamental Superconducting Flux Qubit in Quantum Machine Learning,” International Superconductive Electronics Conference (ISEC) 2019, Riverside, US, Jul. 2019.
D. Saida and Y. Yamanashi, “Investigation of Basic Characteristics of Superconducting Flux Qubit for Quantum Machine Learning,” 20th Anniversary of Superconducting Qubits (SQ20th), Tsukuba, Japan, May 2019.
D. Saida, H. Ariyoshi, and Y. Yamanashi, “Principle Verification of the Superconducting Flux Qubit Cell Toward the Quantum Sampling Approach in Training of Deep Neural Networks,” 31st International Symposiumu on Superconductivity (ISS2018), Tsukuba, Japan, Dec. 2018.
(Invited talk) Y. Yamanashi, S. Nakaishi, and N. Yoshikawa, “Evaluation of Single Flux Quantum Flip-Flops Containing p-Shifted Josephson Junctions,” Applied Superconductivity Conference (ASC) 2018, Seattle, US, Oct. 2018.
A. Sanada, Y. Yamanashi, and N. Yoshikawa, “Study on Single Flux Quantum Floating-Point Divider Based on a Goldschmidt’s Algorithm,” Applied Superconductivity Conference (ASC) 2018, Seattle, US, Oct. 2018.
S. Kobayashi, D. Saida, Y. Yamanashi, S. Morino, and Y. Minato, “Quantum Machine Learning Chip & Ising Model SDK,” Adiabatic Quantum Computing Conference 2018 (AQC2018), Moffett Field, US, June 2018.
T. Matsushima, Y. Yamanashi, N. Takeuchi, and N. Yoshikawa, “Proposal of superconducting analog to digital converter using quantum flux parametron,” 30th International Superconductivity Symposium (ISS2017), Tokyo, Dec. 2017.
A. Sanada, Y. Yamanashi, and N. Yoshikawa, “Study on Integer-Number Parallel Divider Based on Single Flux Quantum Logic,” 30th International Superconductivity Symposium (ISS2017), Tokyo, Dec. 2017.
Y. Yamanashi, A. Sugiyama, and N. Yoshikawa, “Analog Circuit Simulator for Superconducting Circuits Containing pi-Josephson Junctions,” International Superconductive Electronics Conference (ISEC) 2017, Sorrent, Italy, June 2017.
Y. Yamanashi, H. Imai, and N. Yoshikawa, “Influences of Magnetic Flux Trapped in Moats on Superconducting Integrated Circuit Operation,” International Superconductive Electronics Conference (ISEC) 2017, Sorrent, Italy, June 2017.
T. Matsushima, Y. Yamanashi, N. Takeuchi, N. Yoshikawa, and T. Ortlepp, “Evaluation of Relationship between Gray Zone and Energy Consumption of Adiabatic Quantum Flux Parametron circuit” International Superconductive Electronics Conference (ISEC) 2017, Sorrent, Italy, June 2017.
T. Wakamatsu, Y. Yamanashi, and N. Yoshikawa, “High-Speed Superconducting Filter for Sigma-Delta Analog to Digital Converter,” International Symposium on Superconductivity (ISS) 2016, Tokyo, Japan, Dec. 2016.
H. Imai, Y. Yamanashi, and N. Yoshikawa, “Simulation and Measurement of Influence of Flux Quantum Trapped in Moat on Superconducting Circuit,” International Symposium on Superconductivity (ISS) 2016, Tokyo, Japan, Dec. 2016.
(Invited talk) Y. Yamanashi, T. Matsushima, N. Takeuchi, N. Yoshikawa, and T. Ortlepp, “Evaluation of Current Sensitivity of Quantum Flux Parametron,” International Workshop on Superconducting Sensor & Detectors (IWSSD) 2016, Tsukuba, Japan, Nov. 2016.
Y. Yamanashi, R. Yamamoto, and N. Yoshikawa, “Controllable Superconducting Phase Shifter Using Single Flux Quantum Circuit” Applied Superconductivity Conference (ASC) 2016, Denver, US, Sep. 2016.
Y. Yamanashi, R. Tsutsumi, S. Shimizu, and N. Yoshikawa, “High-Speed Operation of LR-Biased Single Flux Quantum Circuit with Dynamic Resetting of Mechanism of Bias Current” Applied Superconductivity Conference (ASC) 2016, Denver, US, Sep. 2016.
Y. Yamanashi, M. Machiguchi, and N. Yoshikawa, “Improvement of Current Resolution of Josephson Comparator by Adiabatic Driving Technique,” Workshop on readout electronics for radiation and particle detectors, Erfurt, Germany, Dec. 2015.
K. Asakura, Y. Yamanashi, and N. Yoshikawa, “Measurement of Bit-Error Rate of the SFQ Logic Gates with Optimized Josephson Comparator,” 28th International Symposium on Superconductivity (ISS2015), Tokyo, Japan, Nov. 2015.
S. Kobako, Y. Yamanashi, and N. Yoshikawa, “Design and Evaluation of Superconducting Autocorrelator for Submillimeter-Wave Spectrometry,” 28th International Symposium on Superconductivity (ISS2015), Tokyo, Japan, Nov. 2015.
Y. Yamanashi, S. Nishimoto, and N. Yoshikawa, “Single-Flux-Quantum Arithmetic Logic Unit Using Dynamically Reconfigurable Logic Gate,” 15th International Superconductive Electronics Conference (ISEC), Nagoya, Japan, Jul. 2015.
H. Sugata, Y. Yamanashi, and N. Yoshikawa, “New Random Number Generation System by Combining Superconducting Physical- and Pseudo-Random Number Generators,” 15th International Superconductive Electronics Conference (ISEC), Nagoya, Japan, Jul. 2015.
R. Tsutsumi, K. Sato, Y. Yamanashi, and N. Yoshikawa, “Improvement of Operation Speed of LR-Biased Low-Power Single Flux Quantum Circuits by Introduction of Dynamic Resetting of Bias Currents,” 15th International Superconductive Electronics Conference (ISEC), Nagoya, Japan, Jul. 2015.
R. Kihara, Y. Yamanashi, and N. Yoshikawa, “Power Reduction of Josephson Random Access Memory Using Stochastic Resonance,” 15th International Superconductive Electronics Conference (ISEC), Nagoya, Japan, Jul. 2015.
F. China, T. Ortlepp, Y. Yamanashi, and N. Yoshikawa, “Signal Interface between Single Flux Quantum Circuit and Adiabatic Quantum Flux Parametron” 15th International Superconductive Electronics Conference (ISEC), Nagoya, Japan, Jul. 2015.
(Invited talk) Y. Yamanashi, R. Tsutsumi, and N. Yoshikawa, “Design and Test of Dc-Biased Zero Static Power Single Flux Quantum Circuit,” 27th International Symposium on Superconductivity (ISS2014), Tokyo, Japan, Nov. 2014.
F. China, Y. Yamanashi, and N. Yoshikawa, “Performance Estimation and Design of High-Sensitive Superconductive Digital Magnetometer,” 27th International Symposium on Superconductivity (ISS2014), Tokyo, Japan, Nov. 2014.
R. Kihara, Y. Yamanashi, and N. Yoshikawa, “Power Reduction of Rf-SQUID Memory Cell Using Stochastic Resonance,” 27th International Symposium on Superconductivity (ISS2014), Tokyo, Japan, Nov. 2014.
Y. Yamanashi, “Design and high-speed test of magnetic-field-torelant single-flux-quantum circuits,” Stellenbosch Workshop on Superconductive Circuit Modelling and Layout Extraction, Stellenbosch, South Africa, Sep. 2014.
F. China, “High sensitivity superconducting digital magnetometer,” Stellenbosch Workshop on Superconductive Circuit Modelling and Layout Extraction, Stellenbosch, South Africa, Sep. 2014.
Y. Yamanashi, R. Tsutsumi, and N. Yoshikawa, “Zero Static Power Single Flux Quantum Circuit Using Magnetic Flux Biasing,” Applied Superconductivity Conference (ASC) 2014, Charlotte, US, Aug. 2014.
S. Nishimoto, Y. Yamanashi, and N. Yoshikawa, “Design Method of Single Flux Quantum Logic Circuits Using Dynamically Reconfigurable Logic Gates,” Applied Superconductivity Conference (ASC) 2014, Charlotte, US, Aug. 2014.
K. Sato, Y. Yamanashi, and N. Yoshikawa, “High Speed Operation of Single Flux Quantum Multiple Input Merger Using a Magnetically Coupled SQUID Stack,” Applied Superconductivity Conference (ASC) 2014, Charlotte, US, Aug. 2014.
Y, Yamanashi and K. Asakura, “Improvement of Bit-Error-Rate of a Single Flux Quantum Logic Gate by Optimizing the Current Comparating Circuit,” SFQ VLSI Workshop for Young Scientists, Nagoya, Japan, Mar. 2014.
M. Otsubo, Y. Yamanashi, and N. Yoshikawa, “Optimization of SFQ logic gate considering dependence of its signal propagation delay on the bias voltage,” International Symposium on Superconductivity (ISS) 2013, Tokyo, Japan, Nov. 2013.
Y. Yamanashi, “High-speed operation of SFQ circuits in an unshielded environment,” 8th FLUXONICS RSFQ Design Workshop 2013, Ilmenau, Germany, Sep. 2013.
Y. Yamanashi, Y. Tsuga, and N. Yoshikawa, “Magnetic field tolerant single-flux-quantum circuit for superconducting sensing system,” International Superconductive Electronics Conference (ISEC) 2013, Cambridge, USA, Jul. 2013.
K. Sato, Y. Yamanashi, and N. Yoshikawa, “Novel multiple input single flux quantum merge circuit using serially connected dc-SQUIDs,” International Superconductive Electronics Conference (ISEC) 2013, Cambridge, USA, Jul. 2013.
F. China, Y. Yamanashi, and N. Yoshikawa, “New superconductive digital magnetometer with sub-flux quantum resolution,” International Superconductive Electronics Conference (ISEC) 2013, Cambridge, USA, Jul. 2013.
T. Ortlepp, Y. Yamanashi, and M. Volkmann, “Factors influencing the memory effect in balanced Josephson comparators,” International Superconductive Electronics Conference (ISEC) 2013, Cambridge, USA, Jul. 2013.
Y. Yamanashi, K. Umeda, and N. Yoshikawa, “Pseudo Sigmoid Function Generator for a Superconductive Neural Network,” Applied Superconductivity Conference (ASC) 2012, Portland, US, Oct. 2012.
K. Aoki, Y. Yamanashi, and N. Yoshikawa, “Multiplexing Techniques of Single Flux Quantum Circuit Based Readout Circuit for a Multi-Channel Sensing System,” Applied Superconductivity Conference (ASC) 2012, Portland, Oct. 2012.
S. Hachiya, Y. Yamanashi, and N. Yoshikawa, “Improvement of Performance of a Superconductive Physical Random Number Generator by On-Chip Data Processing,” Applied Superconductivity Conference (ASC) 2012, Portland, Oct. 2012.
M. Otsubo, Y. Yamanashi, and N. Yoshikawa, “Improvement of Operation Margin of SFQ Circuits by Controlling Dependence of Signal Propagation Time on Bias Voltage,” Applied Superconductivity Conference (ASC) 2012, Portland, Oct. 2012.
Y. Tsuga, Y. Yamanashi, and N. Yoshikawa, “Asynchronous Digital SQUID Magnetometer with an On-Chip Magnetic Feedback for Improvement of Magnetic Resolution,” Applied Superconductivity Conference (ASC) 2012, Portland, Oct. 2012.
K. Aoki, Y. Yamanashi, and N. Yoshikawa, “Time Division Multiplexing for a Multi-channel Asynchronous Digital SQUID System,” 6th East Asia Symposium on Superconductor Electronics, Yonezawa, Japan, Oct. 2011.
Y. Tsuga, Y. Yamanashi, and N. Yoshikawa, “Development of an Asynchronous Digital SQUID Magnetmeter,” 6th East Asia Symposium on Superconductor Electronics, Yonezawa, Japan, Oct. 2011.
Y. Yamanashi, “Asynchronous Digital SQUID Systems,” 7th FLUXONICS RSFQ Design Workshop 2011, Ilmenau, Germany, Sep. 2011.
Y. Yamanashi, T. Sugiura, and N, Yoshikawa, “Novel Superconductive Physical Random Number Generator Using Timing Jitter in Single Flux Quantum Circuit,” Superconductivity Centennial Conference, Den Haag, Netherlands, Sep. 2011.
Y. Yamanashi and T. Ortlepp, “Superconductive current comparator system with sub-microampere resolution” Superconductivity Centennial Conference, Den Haag, Netherlands, Sep. 2011.
T. Imaizumi, Y. Yamanashi, N. Yoshikawa, and T. Ortlepp, “Single Flux Quantum Comparator: A study of Gray Zone Width and Operation Frequency in dependence on circuit parameters,” Superconductivity Centennial Conference, Den Haag, Netherlands, Sep. 2011.
T. Ortlepp and Y. Yamanashi, “Maximum effective data rate of the Josephson comparator,” Superconductivity Centennial Conference, Den Haag, Netherlands, Sep. 2011.
T. Imaizumi, Y. Yamanashi, and N. Yoshikawa, “Investigation of a Dependence of a Gray Zone of a Single Flux Quantum Comparator on the Circuit Parameters,” International Symposium on Superconductivity (ISS) 2010, Tsukuba, Japan, Nov. 2010.
Y. Yamanashi and T. Sugiura, “Development of a Superconductive Physical Random Number Generator,” Kryoelektronische Bauelemente 2010, Zeuthen, Oct. 2010.
Y. Yamanashi, I. Okawa, and N. Yoshikawa, “Design approach of dynamically reconfigurable single flux quantum logic gates,” Applied Superconductivity Conference (ASC) 2010, Washington, USA, Aug. 2010.
T. Sugiura, Y. Yamanashi, and N. Yoshikawa, “Demonstration of 30 Gbit/s generation of superconductive true random number generator,” Applied Superconductivity Conference (ASC) 2010, Washington, USA, Aug. 2010.
Y. Yamanashi, K. Umeda, and K. Sai, “Superconductive Combinational Logic Circuit Using Magnetically Coupled SQUID Array,” 22nd International Symposium on Superconductivity (ISS), Tsukuba, Japan, Nov. 2009.
Y. Yamanashi, “Dynamically programmable SFQ logic circuit,” 6th FLUXONICS RSFQ design workshop 2009, Ilmenau, Germany, Jul. 2009.
Y. Yamanashi, T. Van Duzer, and N. Yoshikawa, “New Results on the Advantage of a Twisted-Pair Bias Supply Line for Large-Scale Josephson Circuits,” International Superconductive Electronics Conference (ISEC) 2009, Fukuoka, Japan, Jun. 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, and 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 (ISEC) 2009, Fukuoka, Japan, Jun. 2009.
T. Sugiura, Y. Yamanashi, and N. Yoshikawa, “Statistical Evaluation of a Superconductive Physical Random Number Generator,” International Superconductive Electronics Conference (ISEC) 2009, Fukuoka, Japan, Jun. 2009.
Y. Yamanashi and N. Yoshikawa, “Superconductive Random Number Generator Using Thermal Noises in SFQ Circuits,” Applied Superconductivity Conference (ASC) 2008, Chicago, USA, Aug. 2008.
Y. Yamanashi, T. Van Duzer, and N. Yoshikawa, “A Novel Power Line to Reduce the Magnetic Field of Supply Currents in Josephson Digital Circuits,” Applied Superconductivity Conference (ASC) 2008, Chicago, USA, Aug. 2008.
Y. Yamanashi, H. Suzuki, M. Nakamiya, and N. Yoshikawa, “Demonstration of picosecond-delay measurements of high-speed signals by single-flux-quantum double-oscillator time-to-digital converters,” Applied Superconductivity Conference (ASC) 2008, Chicago, USA, Aug. 2008.
Y. Yamanashi, T. Nishigai, and N. Yoshikawa, “Study of LR-Loading Technique for Low-Power Single Flux Quantum Circuits,” Applied Superconductivity Conference (ASC) 2006, Seattle, USA, Aug. 2006.
Y. Yamanashi and N. Yoshikawa, “Study on a DC-Powered On-Chip Voltage Generator using SFQ Circuits,” 19th International Symposium on Superconductivity (ISS), Nagoya, Japan, Nov. 2006.
Y. Yamanashi, H. Park, K. Taketomi, N. Yoshikawa, A. Fujimaki, and N. Takagi, “Design and Implementation of Single-Flux-Quantum Floating-Point Adders,” 11th International Superconductive Electronics Conference (ISEC), Washington, USA, Jun. 2007.
Y. Yamanashi, M. Tanaka, A. Akimoto, H. Park, Y. Kamiya, N. Irie, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu, “Design and Implementation of a Pipelined Bit-Serial SFQ Microprocessor, CORE1b,” Applied Superconductivity Conference (ASC) 2006, Seattle, USA, Aug. 2006.
Y. Yamanashi, Y. Nobumori, N. Yoshikawa, A. Fujimaki, H. Terai, and S. Yorozu, “Influences of Global Dispersion of Inductances on Single Flux Quantum Circuit Operation,” 18th International Symposium on Superconductivity (ISS), Tsukuba, Japan, Oct. 2005.
Y. Yamanashi, T. Asano, and N. Yoshikawa, “On-chip Microwave Generator for Manipulation of Superconductive Quantum Bits,” 18th International Symposium on Superconductivity (ISS), Tsukuba, Japan, Oct. 2005.
Y. Yamanashi, A. Akimoto, N. Yoshikawa, M. Tanaka, T. Kawamoto, Y. Kamiya, and A. Fujimaki, “A New Design Approach for Control Circuits of a Pipelined Single-Flux-Quantum Microprocessor,” 10th International Superconductive Electronics Conference (ISEC), Noordwijkerhout, Netherlands, Sep. 2005.
Y. Yamanashi, M. Ito, A. Tagami, and N. Yoshikawa, “Observation of Quantized Energy Levels in a Josephson Junction Using SFQ Circuits,” Applied Superconductivity Conference (ASC) 2004, Jacksonville, USA, Oct. 2004.
Y. Yamanashi, M. Ito, A. Tagami, and N. Yoshikawa, “High-speed Measurement Method of Quantized Energy Levels in Josephson Junctions Using SFQ Circuits” 16th International Symposium on Superconductivity (ISS), Tsukuba, Japan, Oct. 2003.
Y. Yamanashi, K. Kawasaki, N. Yoshikawa, H. Terai, A. Fujimaki, Y. Kameda, and S. Yorozu, “A Calculation of Bias Current Distribution in Large-Scale SFQ Logic Circuits” 9th International Superconductive Electronics Conference (ISEC), Sydney, Australia, Jul. 2003.