Takafumi Yamaji

26 papers C 3Journal 18Unranked 5
YearRankTypeTitle / Venue / Authors
2013 J jnl
All-Digital Background Calibration Technique for Time-Interleaved ADC Using Pseudo Aliasing Signal.
IEEE Trans. Circuits Syst. I Regul. Pap.
Junya Matsuno, Takafumi Yamaji, Masanori Furuta, Tetsuro Itakura
2012 — conf
A -70dBm-sensitivity 522Mbps 0.19nJ/bit-TX 0.43nJ/bit-RX transceiver for TransferJet™ SoC in 65nm CMOS.
VLSIC
Daisuke Miyashita, Kenichi Agawa, Hirotsugu Kajihara, Kenichi Sami, Masaomi Iwanaga, Yosuke Ogasawara, Tomohiko Ito, Daisuke Kurose, Naotaka Koide, Toru Hashimoto, Hiroki Sakurai, Takafumi Yamaji, Takashi Kurihara, Kazumi Sato, Ichiro Seto, Hiroshi Yoshida, Ryuichi Fujimoto, Yasuo Unekawa
2012 C conf
All-digital background calibration for time-interleaved ADC using pseudo aliasing signal.
ISCAS
Junya Matsuno, Takafumi Yamaji, Masanori Furuta, Tetsuro Itakura
2011 — conf
A 570fsrms integrated-jitter ring-VCO-based 1.21GHz PLL with hybrid loop.
ISSCC
Akihide Sai, Takafumi Yamaji, Tetsuro Itakura
2011 J jnl
Harmonic Signal Rejection Schemes of Polyphase Downconverters.
IEEE Trans. Circuits Syst. I Regul. Pap.
Takafumi Yamaji, Hiroshi Tanimoto, Junya Matsuno, Tetsuro Itakura
2010 J jnl
A Direct Conversion Receiver Adopting Balanced Three-Phase Analog System.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Takafumi Yamaji, Takeshi Ueno, Tetsuro Itakura
2008 J jnl
1.2 V, 24 mW/ch, 10 bit, 80 MSample/s Pipelined A/D Converters.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Takeshi Ueno, Tomohiko Ito, Daisuke Kurose, Takafumi Yamaji, Tetsuro Itakura
2008 J jnl
55-mW, 1.2-V, 12-bit, 100-MSPS Pipeline ADCs for Wireless Receivers.
IEICE Trans. Electron.
Tomohiko Ito, Daisuke Kurose, Takeshi Ueno, Takafumi Yamaji, Tetsuro Itakura
2008 J jnl
A Low-Power Low-Noise Clock Signal Generator for Next-Generation Mobile Wireless Terminals.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Akihide Sai, Daisuke Kurose, Takafumi Yamaji, Tetsuro Itakura
2008 C conf
An area-efficient sampling rate converter using negative feedback technique.
ISCAS
Masanori Furuta, Takafumi Yamaji, Takeshi Ueno, Tetsuro Itakura
2007 J jnl
A 1.2-V, 12-bit, 200 MSample/s Current-Steering D/A Converter in 90-nm CMOS.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Takeshi Ueno, Takafumi Yamaji, Tetsuro Itakura
2006 J jnl
55-mW 200-MSPS 10-bit pipeline ADCs for wireless receivers.
IEEE J. Solid State Circuits
Daisuke Kurose, Tomohiko Ito, Takeshi Ueno, Takafumi Yamaji, Tetsuro Itakura
2006 — conf
A 1.2 V, 24 mW/ch, 10 bit, 80 MSample/s Pipelined A/D Converters.
CICC
Takeshi Ueno, Tomohiko Ito, Daisuke Kurose, Takafumi Yamaji, Tetsuro Itakura
2006 C conf
Balanced 3-phase analog signal processing for radio communications.
ISCAS
Takafumi Yamaji, Tetsuro Itakura, Rui Ito, Takeshi Ueno, Hidenori Okuni
2006 J jnl
Low-Power Design of 10-bit 80-MSPS Pipeline ADCs.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Tomohiko Ito, Daisuke Kurose, Takeshi Ueno, Takafumi Yamaji, Tetsuro Itakura
2005 — conf
55-mW 200-MSPS 10-bit pipeline ADCs for wireless receivers.
ESSCIRC
Daisuke Kurose, Tomohiko Ito, Takeshi Ueno, Takafumi Yamaji, Tetsuro Itakura
2005 — conf
A 1.2-V, 12-bit, 200M sample/s current-steering D/A converter in 90-nm CMOS.
CICC
Takeshi Ueno, Takafumi Yamaji, Tetsuro Itakura
2005 J jnl
A 10-bit, 200-MSPS, 105-mW pipeline A-to-D converter.
IEICE Electron. Express
Tomohiko Ito, Takeshi Ueno, Daisuke Kurose, Takafumi Yamaji, Tetsuro Itakura
2005 J jnl
Nonlinear Analysis of Bipolar Harmonic Mixer for Direct Conversion Receivers.
IEICE Trans. Electron.
Hiroshi Tanimoto, Ryuta Ito, Takafumi Yamaji
2004 J jnl
Capacitance Mismatch Evaluation for Low-power Pipeline ADC Design.
IEICE Electron. Express
Tomohiko Ito, Takafumi Yamaji, Daisuke Kurose, Tetsuro Itakura
2003 J jnl
A four-input beam-forming downconverter for adaptive antennas.
IEEE J. Solid State Circuits
Takafumi Yamaji, Daisuke Kurose, Osamu Watanabe, Shuichi Obayashi, Tetsuro Itakura
2002 J jnl
A 2-GHz Down-Converter with 3-dB Bandwidth of 600 MHz Using LO Signal Suppressing Output Buffer.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Osamu Watanabe, Takafumi Yamaji, Tetsuro Itakura, Ichiro Hattori
2002 J jnl
A fourth-order bandpass Δ-Σ modulator using second-order bandpass noise-shaping dynamic element matching.
IEEE J. Solid State Circuits
Takeshi Ueno, Akira Yasuda, Takafumi Yamaji, Tetsuro Itakura
2002 J jnl
A temperature-stable CMOS variable-gain amplifier with 80-dB linearly controlled gain range.
IEEE J. Solid State Circuits
Takafumi Yamaji, Nobuo Kanou, Tetsuro Itakura
1998 J jnl
An I/Q active balanced harmonic mixer with IM2 cancelers and a 45° phase shifter.
IEEE J. Solid State Circuits
Takafumi Yamaji, Hiroshi Tanimoto, Hideyuki Kokatsu
1996 J jnl
A low local input 1.9 GHz Si-bipolar quadrature modulator with no adjustment.
IEEE J. Solid State Circuits
Shoji Otaka, Takafumi Yamaji, Ryuichi Fujimoto, Chikau Takahashi, Hiroshi Tanimoto