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

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

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

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

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

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

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

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

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
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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