Waho Takao

J-GLOBAL         Last updated: May 6, 2019 at 13:16
Waho Takao
Research funding number

Research Areas


Awards & Honors

Distinctive Paper award

Published Papers

Analog-to-Digital Converters using not Multi-Level but Multi-Bit Feedback Paths
Proc. 2017 IEEE 47th International Symposium on Multiple-Valued Logic   7-12   May 2017   [Refereed]
Conventional analog-to-digital converters (ADCs) with medium or high bit-resolution have a feedback path that connects a tentative digital output with the analog input to obtain a final digital output. Digital-to-analog converters (DACs) are used ...
Non-Binary Analog-to-Digital Converter Based on Amoeba-Inspired Neural Network
U. Ishida, Y. Yamazaki and T. Waho
Multiple-Valued Logic (ISMVL), 2015 IEEE International Symposium on   103-108   May 2015   [Refereed]
Analog Circuits for Low-Power Data Converters
T. Waho, K. Ohara
Proc. 24th International Workshop on Post-Binary ULSI Systems   2-5   May 2015   [Refereed]
Matsushiba, R.; Ohara, K.; Waho, T.
Electronics, Circuits and Systems (ICECS), 2014 21st IEEE International Conference on   467-470   Dec 2014   [Refereed]
Takao Waho
2014 IEEE 44th International Symposium on Multiple-Valued Logic (ISMVL) (2014)   73-78   May 2014   [Refereed]


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   Sep 2014   [Refereed]
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 2014
Growth temperature and pre-heating temperature dependence of InP nanowires grown by self-catalytic VLS mode
T. Ogino, M.Yamauchi, Y.Yamamoto, K.Shimomura, and T.Waho
17th International Conference on Metalorganic Vapour Phase Epitaxy (ICMOVPE XVII), Lausanne, Switzerland      Jul 2014   [Refereed]
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   Mar 2014   [Refereed]
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   Mar 2014   [Refereed]

Books etc

Waho Takao (Part:Editor)
Oct 2016   ISBN:978-4-339-02857-7
Electron devices
Waho Takao
Corona   May 2013   ISBN:978-4-339-01848-6
Nanowires : fundamentals and applications
Waho Takao
CMC Publishing   Mar 2013   ISBN:978-4-7813-0760-2
Short-Range Wireless Communications: Emerging Technologies and Applications
Waho Takao
John Wiley & Sons   2009   ISBN:978-0-470-69995-9

Association Memberships


Research Grants & Projects

Multiple-Valued Logic using Resonant-Tunneling Diodes
Project Year: 1999 - 2000


US pat. 6,188,346 : Analog-to-digital conversion device
Waho; Takao (Tokyo, JP), Itoh; Toshihiro (Tokyo, JP)
US Pat. 5,773,996 : Multiple-valued logic circuit
Takao; Waho (Kanagawa, JP)
US Pat. 5,280,182 : Resonant tunneling transistor with barrier layers
Waho; Takao (Kanagawa, JP)


Sophia University Graduate School of Science and Technology, Master's (Doctoral) Program in Science and Technology Professor