Yuki YAMANASHI


Planarized Nb 4-Layer Fabrication Process for Superconducting Integrated Circuits and Its Fabricated Device Evaluation
Shuichi NAGASAWA Masamitsu TANAKA Naoki TAKEUCHI Yuki YAMANASHI Shigeyuki MIYAJIMA Fumihiro CHINA Taiki YAMAE Koki YAMAZAKI Yuta SOMEI Naonori SEGA Yoshinao MIZUGAKI Hiroaki MYOREN Hirotaka TERAI Mutsuo HIDAKA Nobuyuki YOSHIKAWA Akira FUJIMAKI 
Publication:   
Publication Date: 2021/09/01
Vol. E104-C  No. 9  pp. 435-445
Type of Manuscript:  Special Section PAPER (Special Section on Fabrication of Superconductor Devices; Key Technology in Superconductor Electronics)
Category: 
Keyword: 
superconducting fabrication technologyNb/AlOx/Nb Josephson junctioncaldera planarizationmulti-layer structuresingle-flux quantum logicadiabatic quantum flux parametron logiccell-based designdiagnostic shift-registers
 Summary | Full Text:PDF(4MB)

Recent Progress on Reversible Quantum-Flux-Parametron for Superconductor Reversible Computing
Naoki TAKEUCHI Yuki YAMANASHI Nobuyuki YOSHIKAWA 
Publication:   
Publication Date: 2018/05/01
Vol. E101-C  No. 5  pp. 352-358
Type of Manuscript:  INVITED PAPER (Special Section on Innovative Superconducting Devices Based on New Physical Phenomena)
Category: 
Keyword: 
reversible computingadiabatic logicQFP
 Summary | Full Text:PDF(1.9MB)

Majority Gate-Based Feedback Latches for Adiabatic Quantum Flux Parametron Logic
Naoki TSUJI Naoki TAKEUCHI Yuki YAMANASHI Thomas ORTLEPP Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/06/01
Vol. E99-C  No. 6  pp. 710-716
Type of Manuscript:  Special Section PAPER (Special Section on Cutting-Edge Technologies of Superconducting Electronics)
Category: 
Keyword: 
AQFPsuperconducting circuitsJosephson integrated circuitsadiabatic logiclatch
 Summary | Full Text:PDF(3.3MB)

30GHz Operation of Single-Flux-Quantum Arithmetic Logic Unit Implemented by Using Dynamically Reconfigurable Gates
Yuki YAMANASHI Shohei NISHIMOTO Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/06/01
Vol. E99-C  No. 6  pp. 692-696
Type of Manuscript:  Special Section PAPER (Special Section on Cutting-Edge Technologies of Superconducting Electronics)
Category: 
Keyword: 
SFQ circuitshieldingarithmetic logic unitreconfigurable logic device
 Summary | Full Text:PDF(1.5MB)

50 GHz Demonstration of an Integer-Type Butterfly Processing Circuit for an FFT Processor Using the 10 kA/cm2 Nb Process
Yosuke SAKASHITA Yuki YAMANASHI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/03/01
Vol. E98-C  No. 3  pp. 232-237
Type of Manuscript:  Special Section PAPER (Special Section on Leading-Edge Applications and Fundamentals of Superconducting Sensors and Detectors)
Category: 
Keyword: 
SFQ circuitsJosephson integrated circuitFFT processorbutterfly processing circuit
 Summary | Full Text:PDF(1.4MB)

Design and Evaluation of Magnetic Field Tolerant Single Flux Quantum Circuits for Superconductive Sensing Systems
Yuki YAMANASHI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 178-181
Type of Manuscript:  Special Section PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
SFQ circuitcell librarysensor arraymagnetic field tolerance
 Summary | Full Text:PDF(1.3MB)

Design and Demonstration of a Single-Flux-Quantum Multi-Stop Time-to-Digital Converter for Time-of-Flight Mass Spectrometry
Kyosuke SANO Yuki YAMANASHI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 182-187
Type of Manuscript:  Special Section PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
SFQ circuitsTDCTOF-MSSSIDFIFOJosephson integrated circuits
 Summary | Full Text:PDF(1.4MB)

Design and High-Speed Demonstration of Single-Flux-Quantum Bit-Serial Floating-Point Multipliers Using a 10kA/cm2 Nb Process
Xizhu PENG Yuki YAMANASHI Nobuyuki YOSHIKAWA Akira FUJIMAKI Naofumi TAKAGI Kazuyoshi TAKAGI Mutsuo HIDAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 188-193
Type of Manuscript:  Special Section PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
floating point unitmultiplierLSRDPSFQ circuitsuperconductive integrated circuit
 Summary | Full Text:PDF(2.2MB)

Design and Implementation of RSFQ Microwave Choppers for the Superconducting Quantum-Computing System
Naoki TAKEUCHI Yuki YAMANASHI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/04/01
Vol. E93-C  No. 4  pp. 458-462
Type of Manuscript:  Special Section PAPER (Special Section on Frontiers of Superconductive Electronics)
Category: Digital Applications
Keyword: 
SFQquantum bitmicrowave choppersuperconducting circuits
 Summary | Full Text:PDF(523.8KB)

Statistical Evaluation of a Superconductive Physical Random Number Generator
Tatsuro SUGIURA Yuki YAMANASHI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/04/01
Vol. E93-C  No. 4  pp. 453-457
Type of Manuscript:  Special Section PAPER (Special Section on Frontiers of Superconductive Electronics)
Category: Digital Applications
Keyword: 
single-flux-quantum circuitrandom numberJosephson junctioncomparator
 Summary | Full Text:PDF(488.2KB)

100 GHz Demonstrations Based on the Single-Flux-Quantum Cell Library for the 10 kA/cm2 Nb Multi-Layer Process
Yuki YAMANASHI Toshiki KAINUMA Nobuyuki YOSHIKAWA Irina KATAEVA Hiroyuki AKAIKE Akira FUJIMAKI Masamitsu TANAKA Naofumi TAKAGI Shuichi NAGASAWA Mutsuo HIDAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/04/01
Vol. E93-C  No. 4  pp. 440-444
Type of Manuscript:  Special Section PAPER (Special Section on Frontiers of Superconductive Electronics)
Category: Digital Applications
Keyword: 
single flux quantum circuitJosephson junctioncell libraryadder
 Summary | Full Text:PDF(668.8KB)

Bit-Serial Single Flux Quantum Microprocessor CORE
Akira FUJIMAKI Masamitsu TANAKA Takahiro YAMADA Yuki YAMANASHI Heejoung PARK Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/03/01
Vol. E91-C  No. 3  pp. 342-349
Type of Manuscript:  INVITED PAPER (Special Section on Recent Progress in Superconductive Digital Electronics)
Category: 
Keyword: 
superconductormicroprocessorsingle flux quantumbit-serialLSI
 Summary | Full Text:PDF(929.4KB)