Tadashi ARAI


A Triple-Band WCDMA Direct Conversion Receiver IC with Reduced Number of Off-Chip Components and Digital Baseband Control Signals
Osamu WATANABE Rui ITO Toshiya MITOMO Shigehito SAIGUSA Tadashi ARAI Takehiko TOYODA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/06/01
Vol. E91-C  No. 6  pp. 837-843
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
WCDMAdirect conversion receiver(DCR)triple-bandclass AB mixerDC offset canceler
 Summary | Full Text:PDF(715.1KB)

A Fast fc Automatic Tuning Circuit with Wide Tuning Range for WCDMA Direct Conversion Receiver Systems
Osamu WATANABE Rui ITO Shigehito SAIGUSA Tadashi ARAI Tetsuro ITAKURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/06/01
Vol. E90-C  No. 6  pp. 1247-1252
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
WCDMADCRlowpass filterfc automatic tuning
 Summary | Full Text:PDF(687.9KB)

Phase Compensation Technique for a Low-Power Transconductor
Rui ITO Tetsuro ITAKURA Tadashi ARAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/06/01
Vol. E88-C  No. 6  pp. 1263-1266
Type of Manuscript:  Special Section LETTER (Special Section on Analog Circuit and Device Technologies)
Category: Building Block
Keyword: 
phase compensationdifferential-mode signalcommon-mode signaltransconductor
 Summary | Full Text:PDF(187.7KB)

A Direct Conversion Receiver for W-CDMA Reducing Current Consumption to 31 mA
Hiroshi YOSHIDA Takehiko TOYODA Makoto ARAI Ryuichi FUJIMOTO Toshiya MITOMO Masato ISHII Rui ITO Tadashi ARAI Tetsuro ITAKURA Hiroshi TSURUMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/06/01
Vol. E88-C  No. 6  pp. 1271-1274
Type of Manuscript:  Special Section LETTER (Special Section on Analog Circuit and Device Technologies)
Category: RF
Keyword: 
direct conversionpower consumptionW-CDMA
 Summary | Full Text:PDF(607.4KB)

Fully Differential Direct-Conversion Receiver for W-CDMA Reducing DC-Offset Variation
Hiroshi YOSHIDA Takehiko TOYODA Ichiro SETO Ryuichi FUJIMOTO Osamu WATANABE Tadashi ARAI Tetsuro ITAKURA Hiroshi TSURUMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/06/01
Vol. E87-C  No. 6  pp. 901-908
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit and Device Technologies)
Category: 
Keyword: 
direct conversionDC offset cancelerharmonic mixer
 Summary | Full Text:PDF(1.3MB)

A Baseband Gain-Controlled Amplifier with a Linear-in-dB Gain Range from 14 dB to 76 dB and a Fixed Corner Frequency DC Offset Canceler
Tadashi ARAI Tetsuro ITAKURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/06/01
Vol. E87-C  No. 6  pp. 909-914
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit and Device Technologies)
Category: 
Keyword: 
gain controlled amplifierdc offset cancelertransconductorlinearization
 Summary | Full Text:PDF(2.4MB)

A Gm-C Filter Using Multiple-Output Linearized Transconductors
Tadashi ARAI Tetsuro ITAKURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/02/01
Vol. E87-A  No. 2  pp. 384-389
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
Gm-C filtermultiple-input transconductormultiple-output transconductorlinearization
 Summary | Full Text:PDF(355.9KB)

A 2-Vpp Linear Input-Range Fully Balanced CMOS Transconductor and Its Application to a 2.5-V 2.5-MHz Gm-C LPF
Tetsuro ITAKURA Takashi UENO Hiroshi TANIMOTO Tadashi ARAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/11/25
Vol. E83-A  No. 11  pp. 2295-2302
Type of Manuscript:  PAPER
Category: Analog Signal Processing
Keyword: 
analog signal processingintegrated electronicsfully balanced CMOS transconductorcommon-mode rejection ratio
 Summary | Full Text:PDF(2.1MB)