Nobukazu TAKAI


Automatic Design of Operational Amplifier Utilizing both Equation-Based Method and Genetic Algorithm
Kento SUZUKI Nobukazu TAKAI Yoshiki SUGAWARA Masato KATO 
Publication:   
Publication Date: 2017/12/01
Vol. E100-A  No. 12  pp. 2750-2757
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: 
Keyword: 
automatic designcircuit blockequation-basedGenetic Algorithmoperational amplifier
 Summary | Full Text:PDF(1.7MB)

Design for Testability That Reduces Linearity Testing Time of SAR ADCs
Tomohiko OGAWA Haruo KOBAYASHI Satoshi UEMORI Yohei TAN Satoshi ITO Nobukazu TAKAI Takahiro J. YAMAGUCHI Kiichi NIITSU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/06/01
Vol. E94-C  No. 6  pp. 1061-1064
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
SAR ADCtestingDC linearitydesign for testabilitybuilt-in self-test
 Summary | Full Text:PDF(462.8KB)

SAR ADC Algorithm with Redundancy and Digital Error Correction
Tomohiko OGAWA Haruo KOBAYASHI Yosuke TAKAHASHI Nobukazu TAKAI Masao HOTTA Hao SAN Tatsuji MATSUURA Akira ABE Katsuyoshi YAGI Toshihiko MORI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/02/01
Vol. E93-A  No. 2  pp. 415-423
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
SAR ADCdigital error correctionnon-binaryredundancy
 Summary | Full Text:PDF(632.9KB)

EMI Reduction by Spread-Spectrum Clocking in Digitally-Controlled DC-DC Converters
Ibuki MORI Yoshihisa YAMADA Santhos A. WIBOWO Masashi KONO Haruo KOBAYASHI Yukihiro FUJIMURA Nobukazu TAKAI Toshio SUGIYAMA Isao FUKAI Norihisa ONISHI Ichiro TAKEDA Jun-ichi MATSUDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/04/01
Vol. E92-A  No. 4  pp. 1004-1011
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies Emerging Mainly from the 21st Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PWM controlspread-spectrum clock modulationEMIdigitally-controlled DC-DC converter
 Summary | Full Text:PDF(1.4MB)

Steep Down-Slope Sawtooth Wave Generator Utilizing Two Triangluar Waves Exclusively
Nobukazu TAKAI Yukihiro FUJIMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/04/01
Vol. E92-A  No. 4  pp. 1019-1023
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies Emerging Mainly from the 21st Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
sawtooth wavetriangular waveswitching regulator
 Summary | Full Text:PDF(257.8KB)

Rail-to-Rail OTA Utilizing Linear V-I Conversion Circuit Whose Input Stage is Composed of Single Channel MOSFETs
Nobukazu TAKAI Keigo KAWAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/04/01
Vol. E88-A  No. 4  pp. 832-837
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 17th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
rail-to-railOTAsingle channel MOSFETlinear V-I converter
 Summary | Full Text:PDF(315.4KB)

Rail-to-Rail OTA Based on Signal Decomposition
Nobukazu TAKAI Shigetaka TAKAGI Nobuo FUJII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/02/01
Vol. E88-A  No. 2  pp. 424-430
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
OTArail-to-rail operationsignal decomposition
 Summary | Full Text:PDF(425.1KB)

MOSFET Instantaneous Companding Integrator
Nobukazu TAKAI Ken-ichi TAKANO Shigetaka TAKAGI Nobuo FUJII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/02/01
Vol. E84-A  No. 2  pp. 545-551
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques Supporting the System LSI Era)
Category: 
Keyword: 
MOSFETcompanding circuitintegrator
 Summary | Full Text:PDF(590.4KB)

GaAs FET Current-Mode Integrators and Their Application to Filters
Nobukazu TAKAI Nobuo FUJII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/02/25
Vol. E82-A  No. 2  pp. 320-326
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
GaAs MESFETcurrent-modecurrent mirror
 Summary | Full Text:PDF(447.5KB)

GaAs MESFET Linearized Transconductor and Active Load with no CMFB
Nobukazu TAKAI Shigetaka TAKAGI Nobuo FUJII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/02/25
Vol. E80-A  No. 2  pp. 321-327
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques for System-on-Chip Integration)
Category: 
Keyword: 
GaAs MESFET amplifieractive loadlow distortion amplifier
 Summary | Full Text:PDF(449.6KB)