Hiroki TAMURA


The Fractional-N All Digital Frequency Locked Loop with Robustness for PVT Variation and Its Application for the Microcontroller Unit
Ryoichi MIYAUCHI Akio YOSHIDA Shuya NAKANO Hiroki TAMURA Koichi TANNO Yutaka FUKUCHI Yukio KAWAMURA Yuki KODAMA Yuichi SEKIYA 
Publication:   
Publication Date: 2021/08/01
Vol. E104-D  No. 8  pp. 1146-1153
Type of Manuscript:  Special Section PAPER (Special Section on Multiple-Valued Logic and VLSI Computing)
Category: Circuit Technologies
Keyword: 
all digital frequency locked loopfractional-NPVT variationmicrocontroller unit
 Summary | Full Text:PDF(1.7MB)

High-PSRR, Low-Voltage CMOS Current Mode Reference Circuit Using Self-Regulator with Adaptive Biasing Technique
Kenya KONDO Hiroki TAMURA Koichi TANNO 
Publication:   
Publication Date: 2020/02/01
Vol. E103-A  No. 2  pp. 486-491
Type of Manuscript:  PAPER
Category: Analog Signal Processing
Keyword: 
voltage referencebandgap referencecurrent modelow voltagesubthresholdself-regulator
 Summary | Full Text:PDF(3.3MB)

Low Voltage CMOS Current Mode Reference Circuit without Operational Amplifiers
Kenya KONDO Koichi TANNO Hiroki TAMURA Shigetoshi NAKATAKE 
Publication:   
Publication Date: 2018/05/01
Vol. E101-A  No. 5  pp. 748-754
Type of Manuscript:  PAPER
Category: Analog Signal Processing
Keyword: 
voltage referencebandgap referencecurrent modeOPAMP lesslow voltagelow powersubthreshold
 Summary | Full Text:PDF(1.4MB)

A Study on Gaze Estimation System of the Horizontal Angle Using Electrooculogram Signals
Mingmin YAN Hiroki TAMURA Koichi TANNO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/09/01
Vol. E97-D  No. 9  pp. 2330-2337
Type of Manuscript:  Special Section PAPER (Special Section on Multiple-Valued Logic and VLSI Computing)
Category: Circuit Implementations
Keyword: 
electrooculogram signalgaze estimationmathematical modeldrift
 Summary | Full Text:PDF(2.6MB)

A Low-Power and High-Linear Current to Time Converter for Wireless Sensor Networks
Ryota SAKAMOTO Koichi TANNO Hiroki TAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/06/01
Vol. E95-A  No. 6  pp. 1088-1090
Type of Manuscript:  LETTER
Category: Circuit Theory
Keyword: 
current to time convertertemperature sensoranalog to digital converterCMOS analog circuit
 Summary | Full Text:PDF(297.3KB)

Optimization and Verification of Current-Mode Multiple-Valued Digit ORNS Arithmetic Circuits
Motoi INABA Koichi TANNO Hiroki TAMURA Okihiko ISHIZUKA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/08/01
Vol. E93-D  No. 8  pp. 2073-2079
Type of Manuscript:  Special Section PAPER (Special Section on Multiple-Valued Logic and VLSI Computing)
Category: Multiple-Valued VLSI Technology
Keyword: 
multiple-valued logicoverlap resolution number systemcurrent-mode circuitweak-inversion region
 Summary | Full Text:PDF(678.3KB)

Low-Voltage, Wide-Common-Mode-Range and High-CMRR CMOS OTA
Hisashi TANAKA Koichi TÁNNO Ryota MIWA Hiroki TAMURA Kenji MURAO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/05/01
Vol. E93-A  No. 5  pp. 936-941
Type of Manuscript:  PAPER
Category: Analog Signal Processing
Keyword: 
weak inversion regionvoltage-to-current converterlow-voltagelow-powerhigh-linearity
 Summary | Full Text:PDF(852.7KB)

A Multi-Layered Immune System for Graph Planarization Problem
Shangce GAO Rong-Long WANG Hiroki TAMURA Zheng TANG 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2009/12/01
Vol. E92-D  No. 12  pp. 2498-2507
Type of Manuscript:  PAPER
Category: Biocybernetics, Neurocomputing
Keyword: 
artificial immune systemmulti-layeredgraph planarizationestimationfeature
 Summary | Full Text:PDF(476.3KB)

Design of CMOS OTAs for Low-Voltage and Low-Power Application
Hisashi TANAKA Koichi TANNO Hiroki TAMURA Kenji MURAO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/11/01
Vol. E91-A  No. 11  pp. 3385-3388
Type of Manuscript:  LETTER
Category: Analog Signal Processing
Keyword: 
weak inversion regionOTAlow-voltagelow-powerhigh-linearity
 Summary | Full Text:PDF(258.9KB)

Midpoint-Validation Method for Support Vector Machine Classification
Hiroki TAMURA Koichi TANNO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/07/01
Vol. E91-D  No. 7  pp. 2095-2098
Type of Manuscript:  LETTER
Category: Biocybernetics, Neurocomputing
Keyword: 
support vector machinemidpoint-validationpattern classification problem
 Summary | Full Text:PDF(260.3KB)

Objective Function Adjustment Algorithm for Combinatorial Optimization Problems
Hiroki TAMURA Zongmei ZHANG Zheng TANG Masahiro ISHII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/09/01
Vol. E89-A  No. 9  pp. 2441-2444
Type of Manuscript:  LETTER
Category: Numerical Analysis and Optimization
Keyword: 
guided local searchlocal searchobjective function adjustmentTabu search
 Summary | Full Text:PDF(576.1KB)

Affinity Based Lateral Interaction Artificial Immune System
Hongwei DAI Zheng TANG Yu YANG Hiroki TAMURA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2006/04/01
Vol. E89-D  No. 4  pp. 1515-1524
Type of Manuscript:  PAPER
Category: Human-computer Interaction
Keyword: 
immune systemsaffinityartificial immune systempattern recognition
 Summary | Full Text:PDF(457.3KB)

Avoiding the Local Minima Problem in Backpropagation Algorithm with Modified Error Function
Weixing BI Xugang WANG Zheng TANG Hiroki TAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/12/01
Vol. E88-A  No. 12  pp. 3645-3653
Type of Manuscript:  PAPER
Category: Neural Networks and Bioengineering
Keyword: 
backpropagationlearninglocal minimamodified error function
 Summary | Full Text:PDF(547.6KB)

An Expanded Maximum Neural Network with Chaotic Dynamics for Cellular Radio Channel Assignment Problem
Jiahai WANG Zheng TANG Hiroki TAMURA Xinshun XU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/08/01
Vol. E87-A  No. 8  pp. 2092-2099
Type of Manuscript:  PAPER
Category: Nonlinear Problems
Keyword: 
channel assignment problemexpanded maximum neural networktransient chaosNP-complete problem
 Summary | Full Text:PDF(920.5KB)

An Improved Artificial Immune Network Model
Wei-Dong SUN Zheng TANG Hiroki TAMURA Masahiro ISHII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Vol. E87-A  No. 6  pp. 1632-1640
Type of Manuscript:  PAPER
Category: Neural Networks and Bioengineering
Keyword: 
immune responsefuzzy immune theoryimmune networkpattern classificationpattern recognition
 Summary | Full Text:PDF(2.1MB)

Multilayer Network Learning Algorithm Based on Pattern Search Method
Xu-Gang WANG Zheng TANG Hiroki TAMURA Masahiro ISHII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1869-1875
Type of Manuscript:  PAPER
Category: Neural Networks and Bioengineering
Keyword: 
multilayer neural networkspattern search methodbackpropagationlearning
 Summary | Full Text:PDF(272.7KB)

An Artificial Immune System Architecture and Its Applications
Wei-Dong SUN Zheng TANG Hiroki TAMURA Masahiro ISHII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1858-1868
Type of Manuscript:  PAPER
Category: Neural Networks and Bioengineering
Keyword: 
immune theoryimmune networkimmune responsepattern recognitionpattern classification
 Summary | Full Text:PDF(819.4KB)