Nobuyuki YOSHIKAWA


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)

Superconducting Digital Electronics for Controlling Quantum Computing Systems
Nobuyuki YOSHIKAWA 
Publication:   
Publication Date: 2019/03/01
Vol. E102-C  No. 3  pp. 217-223
Type of Manuscript:  INVITED PAPER (Special Section on Superconducting Electronics for Quantum Information Technologies)
Category: 
Keyword: 
qubitquantum computingsingle-flux quantum circuitadiabatic quantum flux parametron circuitsuperconducting integrated circuits
 Summary | Full Text:PDF(1MB)

FOREWORD
Nobuyuki YOSHIKAWA 
Publication:   
Publication Date: 2018/05/01
Vol. E101-C  No. 5  pp. 351-351
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(82.8KB)

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)

Thermally Assisted Superconductor Transistors for Josephson-CMOS Hybrid Memories
Kyosuke SANO Masato SUZUKI Kohei MARUYAMA Soya TANIGUCHI Masamitsu TANAKA Akira FUJIMAKI Masumi INOUE Nobuyuki YOSHIKAWA 
Publication:   
Publication Date: 2018/05/01
Vol. E101-C  No. 5  pp. 370-377
Type of Manuscript:  INVITED PAPER (Special Section on Innovative Superconducting Devices Based on New Physical Phenomena)
Category: 
Keyword: 
nanodevicesthermally assisted devicesingle-flux-quantum logicsuperconducting integrated circuits
 Summary | Full Text:PDF(1.4MB)

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)

Inductance and Current Distribution Extraction in Nb Multilayer Circuits with Superconductive and Resistive Components
Coenrad FOURIE Naoki TAKEUCHI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/06/01
Vol. E99-C  No. 6  pp. 683-691
Type of Manuscript:  INVITED PAPER (Special Section on Cutting-Edge Technologies of Superconducting Electronics)
Category: 
Keyword: 
ground plane return currentsinductexlayout extractionnumerical inductance calculationparasitic coupling
 Summary | Full Text:PDF(4.7MB)

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)

A Reconfigurable Data-Path Accelerator Based on Single Flux Quantum Circuits
Hiroshi KATAOKA Hiroaki HONDA Farhad MEHDIPOUR Nobuyuki YOSHIKAWA Akira FUJIMAKI Hiroyuki AKAIKE Naofumi TAKAGI Kazuaki MURAKAMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 141-148
Type of Manuscript:  INVITED PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
single flux quantumreconfigurable data-pathaccelerator
 Summary | Full Text:PDF(2MB)

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)

Large-Scale Integrated Circuit Design Based on a Nb Nine-Layer Structure for Reconfigurable Data-Path Processors
Akira FUJIMAKI Masamitsu TANAKA Ryo KASAGI Katsumi TAKAGI Masakazu OKADA Yuhi HAYAKAWA Kensuke TAKATA Hiroyuki AKAIKE Nobuyuki YOSHIKAWA Shuichi NAGASAWA Kazuyoshi TAKAGI Naofumi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 157-165
Type of Manuscript:  INVITED PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
advanced processcell-based design techniquehigh-end computinglarge-scale integrationrapid single-flux-quantum circuits
 Summary | Full Text:PDF(2.3MB)

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)

Nb 9-Layer Fabrication Process for Superconducting Large-Scale SFQ Circuits and Its Process Evaluation
Shuichi NAGASAWA Kenji HINODE Tetsuro SATOH Mutsuo HIDAKA Hiroyuki AKAIKE Akira FUJIMAKI Nobuyuki YOSHIKAWA Kazuyoshi TAKAGI Naofumi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/03/01
Vol. E97-C  No. 3  pp. 132-140
Type of Manuscript:  INVITED PAPER (Special Section on Leading-Edge Technology of Superconductor Large-Scale Integrated Circuits)
Category: 
Keyword: 
superconducting fabrication technologyNb/AlOx/Nb Josephson junctionsingle flux quantumplanarizationshift register
 Summary | Full Text:PDF(5.3MB)

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)

FOREWORD
Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/03/01
Vol. E94-C  No. 3  pp. 253-253
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(92.1KB)

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)

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)

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)

Proposal of a Desk-Side Supercomputer with Reconfigurable Data-Paths Using Rapid Single-Flux-Quantum Circuits
Naofumi TAKAGI Kazuaki MURAKAMI Akira FUJIMAKI Nobuyuki YOSHIKAWA Koji INOUE Hiroaki HONDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/03/01
Vol. E91-C  No. 3  pp. 350-355
Type of Manuscript:  INVITED PAPER (Special Section on Recent Progress in Superconductive Digital Electronics)
Category: 
Keyword: 
superconductorrapid single-flux-quantum circuitreconfigurable data-pathhigh-performance computingsupercomputer
 Summary | Full Text:PDF(297.2KB)

Development of Passive Interconnection Technology for SFQ Circuits
Yoshihito HASHIMOTO Shinichi YOROZU Yoshio KAMEDA Akira FUJIMAKI Hirotaka TERAI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/02/01
Vol. E88-C  No. 2  pp. 198-207
Type of Manuscript:  INVITED PAPER (Special Section on Superconducting Electronic Devices and Their Applications)
Category: 
Keyword: 
SFQintegrated circuitinterconnectionsuperconductorpassive transmission line
 Summary | Full Text:PDF(1.9MB)

Design of Small RSFQ Microprocessor Based on Cell-Based Top-Down Design Methodology
Futabako MATSUZAKI Kenichi YODA Junichi KOSHIYAMA Kei MOTOORI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Vol. E85-C  No. 3  pp. 659-664
Type of Manuscript:  Special Section PAPER (Special Issue on Superconductive Electronics)
Category: Digital Devices and Their Applications
Keyword: 
SFQBDDsuperconducting circuitmicroprocessorstandard cell
 Summary | Full Text:PDF(711.2KB)

High-End Server Based on Complexity-Reduced Architecture for Superconductor Technology
Akira FUJIMAKI Yoshiaki TAKAI Nobuyuki YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Vol. E85-C  No. 3  pp. 612-616
Type of Manuscript:  INVITED PAPER (Special Issue on Superconductive Electronics)
Category: Digital Devices and Their Applications
Keyword: 
SFQmemoryprocessorsuperconducting circuitJAVA
 Summary | Full Text:PDF(350.1KB)

Parameter Optimization of Single Flux Quantum Digital Circuits Based on Monte Carlo Yield Analysis
Nobuyuki YOSHIKAWA Kaoru YONEYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2000/01/25
Vol. E83-C  No. 1  pp. 75-80
Type of Manuscript:  Special Section PAPER (Special Issue on Superconductive Devices and Systems)
Category: Digital Applications
Keyword: 
RSFQ logic circuitssingle flux quantumsuperconducting circuitscircuit optimizationcenter-of-gravity methodcircuit yieldMonte Carlo yield analysis
 Summary | Full Text:PDF(888KB)

Design Considerations of Data-Driven Self-Timed RSFQ Adder Circuits
Nobuyuki YOSHIKAWA Hiroshi TAGO Kaoru YONEYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/10/25
Vol. E81-C  No. 10  pp. 1618-1626
Type of Manuscript:  INVITED PAPER (Special Issue on Low- and High-Temperature Superconductive Electron Devices and Their Applications)
Category: Digital Applications
Keyword: 
RSFQ logic circuitssingle flux quantumsuperconducting circuitshigh-speed integrated circuitsadder
 Summary | Full Text:PDF(708.1KB)

Possibility of N-Superconductivity in Cytochrome-c3 2-Dimensional System
Masataka SUGAHARA Wataru TAKANO Katsumi NIKI Nobuo HANEJI Nobuyuki YOSHIKAWA Katsuhiro IRIE 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/04/25
Vol. E69-E  No. 4  pp. 423-424
Type of Manuscript:  Special Section LETTER (Special Issue: Papers from 1986 National Convention IECE Japan)
Category: Superconductivity Electronics
Keyword: 
 Summary | Full Text:PDF(96.7KB)