Takao Waho

Profile Information

Degree: 理学博士(早稲田大学)

Researcher number: 90317511
J-GLOBAL ID: 200901023598411350
researchmap Member ID: 1000293759

Research Interests

Research Areas

Informatics / Computer systems / delta-sigma domain signal processing
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electric/electronic material engineering / nanowire, heterogeneous integration
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electronic devices and equipment / analog-to-digital converter, delta-sigma modulator

Major Research History

Apr, 2023 - Present

(Professor Emeritus), Faculty of Science and Technology, Sophia University
Apr, 2019 - Mar, 2023

Faculty of Science and Technology Department of Engineering and Applied Sciences, Sophia University
Apr, 2016 - Mar, 2019

Graduate School of Science and Technology, Sophia University
Apr, 1999 - Mar, 2016

Faculty of Science and Technology, Sophia University
Apr, 2010 - Mar, 2011

Research Center for Integrated Quantum Electronics, Hokkaido University
Apr, 1975 - Mar, 1999

主幹研究員他, 電気通信研究所, 日本電信電話株式会社

Education

Apr, 1973 - Mar, 1975

Graduate School of Science and Engineering, Waseda University
Apr, 1969 - Mar, 1973

School of Science and Engineering, Waseda University

Major Committee Memberships

Jan, 2008 - Dec, 2009

Technical Committee on Multiple-Valued Logic, Chair, IEEE Computer Society
2005 - 2007

電子デバイス研究専門委員会委員長, 電子情報通信学会エレクトロニクスソサエティ
2002 - 2004

和文論文誌編集委員会委員長, 電子情報通信学会エレクトロニクスソサエティ

Major Awards

May, 2021

Outstanding Contributed Paper Award, A Delta-Sigma-Modulator Feedforward Network for a Non-Binary Analog-to-Digital Converter, Technical Committee on Multiple-Valued Logic, IEEE Computer Society, IEEE

Takao Waho
Nov, 2020

Long Term Contribution Award, MVL Technical Committee, The Computer Society, Institute of Electrical and Electronics

Takao Waho
Sep, 2020

MVL論文賞, 積分器とFPGAを用いたΔΣ変調器の試作と評価, 多値論理研究会

小泉智明, 和保孝夫, 林等
Feb, 2013

論文発表奨励賞受賞者, InAsナノワイヤの電界アシスト自己整合堆積プロセス, 電子情報通信学会エレクトロニクスソサエティ電子デバイス研究会

船山裕晃, 渡邉龍郎, 道又賢司, 村上新, 下村和彦, 和保孝夫
Sep, 2010

第33回多値フォーラム奨励賞, ADCオンチップテスト用ランプ波信号発生回路の設計, 多値論理研究会

遠山雄二, 小野大騎, 和保孝夫
Jul, 2009

TAOB活動への感謝状, Contribution to Technical Activities Operating Committee, IEEEコンピュータソサエティ

Takao Waho
1997

Distinctive Paper award

Papers

200

High-precision signal processing using 2nd-order ΔΣ-modulated bitstreams

A. Koyama, T. Waho, H. Hayashi

32nd International Workshop on Post-Binary ULSI Systems (ULSIWS), May, 2023 Peer-reviewedCorresponding author
Delta-Sigma Domain Signal Processing: A Review with Relevant Topics in Stochastic Computing

Takao Waho, Akihisa Koyama, Hitoshi Hayashi

2023 IEEE 53rd International Symposium on Multiple-Valued Logic (ISMVL), 88-93, May, 2023 Peer-reviewedLead authorCorresponding author
A ΔΣ-Modulation Feedforward Network for Non-Binary Analog-to-Digital Converters

Takao WAHO, Tomoaki KOIZUMI, Hitoshi HAYASHI

IEICE Transactions on Information and Systems, E104.D(8) 1130-1137, Aug 1, 2021 Peer-reviewedLead authorCorresponding author
A multi-level cascaded delta-sigma modulator with reduced quantization noise leakage

Takao Waho, Tomoaki Koizumi, Hitoshi Hayashi

2021 IEEE 51st International Symposium on Multiple-Valued Logic (ISMVL), May, 2021 Peer-reviewedLead author
A delta-sigma-modulation multi-channel network with improved noise-shaping characteristics

Tomoaki Koizumi, Takao Waho, Hitoshi Hayashi

2021 IEEE International Symposium on Circuits and Systems (ISCAS), 1-5, May, 2021 Peer-reviewedCorresponding author
A delta-sigma-modulator feedforward network for a non-binary analog-to-digital converter

Takao Waho

2020 IEEE 50th International Symposium on Multiple-Valued Logic (ISMVL), 143-148, Nov, 2020 Peer-reviewedLead authorCorresponding author
An Analog-to-Digital Converter Using Delta-Sigma Modulator Network

Takao Waho

Proc. 2018 IEEE 48th International Symposium on Multiple-Valued Logic (ISMVL), 25-30, 2018 Peer-reviewed
Analog-to-Digital Converters using not Multi-Level but Multi-Bit Feedback Paths

Takao Waho

Proc. 2017 IEEE 47th International Symposium on Multiple-Valued Logic, 7-12, May 22, 2017 Peer-reviewed
Multi-bit  Modulators Using Artificial Neural Network

MVL Technical Report, MVL-17(1) 83-87, Jan 7, 2017
ダイナミック共通ソース積分器：アナログ回路低消費電力化の一手法

小原一馬, 和保孝夫

多値論理研究ノート, 39(12) 1-6, Sep 10, 2016
Analog‐to‐Digital Converters Using Artificial Neural Network: A Review

Takao Waho

Proc. International Workshop on Post-Binary ULSI Systems, 3-4, May 17, 2016 Invited
粘菌コンピューティングを模したニューラルネットワーク型A/D変換器

石田宇一, 和保孝夫

電子情報通信学会技術研究報告. ED, 電子デバイス, Mar 4, 2016
Emission wavelength control of self-catalytic InP/GaInAs/InP core-multishell nanowire on InP substrate grown by metal organic vapor phase epitaxy

Takehiro Ogino, Keita Asakura, Kohei Takano, Takao Waho, Kazuhiko Shimomura

JAPANESE JOURNAL OF APPLIED PHYSICS, 55(3), Mar, 2016 Peer-reviewed
ニューラルネットを用いたA/D変換器

和保孝夫, 石田宇一

第29回多値論理とその応用研究会, MVL16(10), Jan 10, 2016
PL emission of InP/GalnAs/InP core-multishell NWs grown by self-catalytic VLS mode

T. Ogino, K. Asakura, T. Waho, K. Shimomura

2015 11th Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2015, 3, Jan 7, 2016 Peer-reviewed
Electrical characteristic of n-InP/i-GaInAs/p-InP core-multishell NWs grown by self-catalytic VLS mode

K. Asakura, T. Ogino, K. Takano, T. Waho, K. Shimomura

2016 COMPOUND SEMICONDUCTOR WEEK (CSW) INCLUDES 28TH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE & RELATED MATERIALS (IPRM) & 43RD INTERNATIONAL SYMPOSIUM ON COMPOUND SEMICONDUCTORS (ISCS), 1-2, 2016 Peer-reviewed
Optical characteristics of InP/GaInAs core-multishell NWs grown by self-catalytic VLS mode

Kohei Takano, Takehiro Ogino, Keita Asakura, Takao Waho, Kuzuhiko Shimomura

2016 21ST OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) HELD JOINTLY WITH 2016 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS), 1-3, 2016 Peer-reviewed
InAs-Nanowire/CMOS Co-Integration for Sensor Applications

Takao Waho

BIT's 5th Nano Science and Technology 2015, Sep 25, 2015 Invited
InAs Nanowire Resistance Measurement Using Nanowire/CMOS Co-Integrated Circuit

Issei Shimamoto, Kazuma Ohara, Takehiro Ogino, Kazuhiko Shimomura, Takao Waho

11th Topical Workshop on Heterostructure Microelectronics, Aug, 2015 Peer-reviewed
Analog Circuits for Low-Power Data Converters

T. Waho, K. Ohara

Proc. 24th International Workshop on Post-Binary ULSI Systems, 2-5, May 17, 2015 Peer-reviewed

Misc.

160

[20p-P7-2]自己触媒 VLS 法による InP/GaInAs/InP コアマルチシェルナノワイヤの光学特性評価

高野紘平, 荻野雄大, 朝倉啓太, 和保孝夫, 下村和彦

応用物理学会春季学術講演会「講演予稿集」, 2016年第63回, Mar 20, 2016
[19p-W834-8]自己触媒 VLS 法による n-InP/ i-GaInAs/ p-InP コアシェルナノワイヤの電気特性評価

朝倉啓太, 荻野雄大, 高野紘平, 和保孝夫, 下村和彦

応用物理学会春季学術講演会「講演予稿集」, 2016年第63回, Mar 19, 2016 Peer-reviewed
C-12-18 能動/受動併用ダイナミック積分器を用いた低消費電力ΔΣ変調器

小原一馬, 和保孝夫

電子情報通信学会総合大会講演論文集, 2016年, Mar 16, 2016
A-1-17 シリアルDACを用いた逐次比較型A/D変換器の設計

山崎雄介, 小原一馬, 和保孝夫

電子情報通信学会総合大会講演論文集, 2016年, Mar 15, 2016
C-10-13 InAsナノワイヤ/CMOS集積回路のLOCへの応用

島本一成, 多田共史, 荻野雄大, 朝倉啓太, 下村和彦, 和保孝夫

電子情報通信学会総合大会講演論文集, 2016年, Mar 15, 2016
[15a-PB1-2] 自己触媒VLS法によるInP/GaInAs/InPコアシェルナノワイヤのTMI供給量依存性

朝倉啓太, 荻野雄大, 高野紘平, 和保孝夫, 下村和彦

応用物理学会秋季学術講演会「講演予稿集」, 2015年第76回, Sep 15, 2015
[14p-2Q-3] 自己触媒VLS法によるInP/GaInAs/InPコアシェルナノワイヤの光学特性評価

荻野雄大, 朝倉啓太, 高野紘平, 和保孝夫, 下村和彦

応用物理学会秋季学術講演会「講演予稿集」, 2015年第76回, Sep 14, 2015
[13p-P12-4] 自己触媒VLS法によるInPナノワイヤのTMI供給量依存性

朝倉啓太, 荻野雄大, 下村和彦, 和保孝夫

応用物理学会春季学術講演会「講演予稿集」, 第62回 (2015年), Mar 13, 2015
C-12-31 ダイナミック積分器を用いた2次Δ∑変調器

小原一馬, 松芝亮, 和保孝夫

電子情報通信学会総合大会講演論文集, 2015年, Mar 13, 2015
[12a-A20-10] 自己触媒VLS法によるInP/GaInAs/InPコアシェルナノワイヤの成長

荻野雄大, 朝倉啓太, 下村和彦, 和保孝夫

応用物理学会春季学術講演会「講演予稿集」, 第62回 (2015年), Mar 12, 2015
A-1-26 チャージシェア型非2進SAR ADCの設計

山﨑雄介, 和保孝夫

電子情報通信学会総合大会講演論文集, 2015年, Mar 11, 2015
C-10-14 InAsナノワイヤ/CMOS異種技術集積化とセンサ応用の可能性

島本一成, 細野優, 小原一馬, 和保孝夫, 荻野雄大, 下村和彦

電子情報通信学会総合大会講演論文集, 2015年, Mar 11, 2015
Pre-heating temperature dependence of InP nanowires grown by self-catalyticVLS mode

Takehiro Ogino, Keita Asakura, Kazuhiko Shimomura, Takao Waho

第75回 (2014年), Sep 18, 2014
A-1-11 Low-Power 2nd-Order ΔΣ Modulator Using Level-Shift Dynamic-Common-Source Integrators

Ohara Kazuma, Matsushiba Ryo, Waho Takao

Proceedings of the ... Society Conference of IEICE, 2014年_基礎・境界 11-11, Sep, 2014 Peer-reviewed
Growth temperature and pre-heating temperature dependence of InP nanowires grown by self-catalytic VLS mode

T. Ogino, M.Yamauchi, Y.Yamamoto, K.Shimomura, T.Waho

17th International Conference on Metalorganic Vapour Phase Epitaxy (ICMOVPE XVII), Lausanne, Switzerland, Jul 16, 2014 Peer-reviewed
Growth temperature dependence of InP nanowires grown by self-assisted VLS

Takehiro Ogino, Masayuki Yamauchi, Yuta Yamamoto, KazuhikoShimomura, Takao Waho

第61回 (2014年), Mar 18, 2014
異種技術集積：ナノワイヤ、ΔΣ、非2進（招待講演）

和保孝夫

日本学術振興会、光ネットワークシステム技術第171委員会、第50回研究会資料, 7-35, Mar, 2014 Invited
A-1-6 Asynchronous Redundant SAR ADC with 2 Comparators

Kurisu Yuki, Sasaki Tatsuya, Waho Takao

Proceedings of the ... IEICE general conference, 2014年_基礎・境界 6-6, Mar, 2014 Peer-reviewed
C-12-6 Performance Evaluation of a 2nd-Order ΔΣ Modulator Using Dynamic-Common-Source Integrators

Matsushiba Ryo, Kotani Hiroaki, Waho Takao

Proceedings of the ... IEICE general conference, 2014年_エレクトロニクス(2) 70-70, Mar, 2014 Peer-reviewed
InAs and GaAs nanowires for electronics and optoelectronics (Invited)

W. Prost, F.-J. Tegude, T. Waho

TUM-IAS Focus Workshop on “Advances in Semiconductor Nanowire-based Photonics”, 5-6, Oct, 2013 Invited

Major Books and Other Publications

ΔΣ (デルタシグマ) 型アナログ/デジタル変換器入門（第2版）

Pavan, Shanthi, Schreier, Richard, Temes, Gabor C., 和保, 孝夫, 安田, 彰 (Role: Joint editor, 監訳)

丸善, Dec, 2019 (ISBN: 9784621304723)
Introduction to analog-to-digital converters

Takao Waho

River Publishers, Aug, 2019 (ISBN: 9788770221023)
Introduction to Analog-to-Digital Conversion

Mar, 2019 (ISBN: 9784339009187)
Electron devices

Waho Takao

Corona, May 10, 2013 (ISBN: 9784339018486)
Short-Range Wireless Communications: Emerging Technologies and Applications

Waho Takao (Role: Contributor)

John Wiley & Sons, 2009 (ISBN: 9780470699959)
『ΔΣ型アナログ/デジタル変換器入門』

和保孝夫 (Role: Joint editor, 監訳)

丸善, Aug, 2007 (ISBN: 9784621078723)