Mamoru Ugajin

19 papers Journal 14Unranked 5
YearRankTypeTitle / Venue / Authors
2023 J jnl
A Study of Phase-Adjusting Architectures for Low-Phase-Noise Quadrature Voltage-Controlled Oscillators.
IEICE Trans. Electron.
Mamoru Ugajin, Yuya Kakei, Nobuyuki Itoh
2021 J jnl
A quadrature voltage-controlled oscillator using phase-adjusting architecture for suppressing phase noise.
IEICE Electron. Express
Mamoru Ugajin, Yuya Kakei, Nobuyuki Itoh
2018 J jnl
Novel Access Control Scheme with Collision Detection Utilizing MIMO Transmission Procedure in WLAN Systems.
IEICE Trans. Commun.
Takefumi Hiraguri, Kentaro Nishimori, Yoshiaki Morino, Mamoru Ugajin, Hideaki Yoshino
2017 J jnl
An (
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Mamoru Ugajin, Takuya Shindo, Tsuneo Tsukahara, Takefumi Hiraguri
2015 J jnl
High-image-rejection wireless-receiver architecture with a 3-phase active RC complex filter.
IEICE Electron. Express
Mamoru Ugajin, Yuta Kobayashi, Tsuneo Tsukahara
2015 — conf
Image-rejection-performance assessment of double-conversion wireless receiver with 3-phase complex filter using Montecarlo simulation.
ISCIT
Mamoru Ugajin, Takuya Shindou
2013 J jnl
A 280-MHz CMOS Intra-Symbol Intermittent RF Front End for Adaptive Power Reduction of Wireless Receivers According to Received-Signal Intensity in Sensor Networks.
IEICE Trans. Electron.
Mitsuo Nakamura, Mamoru Ugajin, Mitsuru Harada
2012 J jnl
Proposal of channel-grouping wireless-transceiver architecture for suppressing local-oscillator phase noise.
IEICE Electron. Express
Mamoru Ugajin
2012 J jnl
Third-Harmonic Envelope Feedback Method for High-Efficiency Linear Power Amplifiers.
IEICE Trans. Electron.
Shoichi Oshima, Mamoru Ugajin, Mitsuru Harada
2011 J jnl
A 1-Mbps 1.6-µA Active-RFID CMOS LSI for the 300-MHz Frequency Band with an All-Digital RF Transmitting Scheme.
IEICE Trans. Electron.
Kenji Suzuki, Mamoru Ugajin, Mitsuru Harada
2011 J jnl
A 5th-Order SC Complex BPF Using Series Capacitances for Low-IF Narrowband Wireless Receivers.
IEICE Trans. Electron.
Kenji Suzuki, Mamoru Ugajin, Mitsuru Harada
2011 J jnl
Design and Performance of a Sub-Nano-Ampere Two-Stage Power Management Circuit in 0.35-µm CMOS for Dust-Size Sensor Nodes.
IEICE Trans. Electron.
Mamoru Ugajin, Toshishige Shimamura, Shin'ichiro Mutoh, Mitsuru Harada
2011 J jnl
Operation of Ultra-Low Leakage Regulator Circuits with SOI and Bulk Technologies for Controlling Wireless Transceivers.
IEICE Trans. Electron.
Mamoru Ugajin, Akihiro Yamagishi, Kenji Suzuki, Mitsuru Harada
2010 — conf
Nano-watt power management and vibration sensing on a dust-size batteryless sensor node for ambient intelligence applications.
ISSCC
Toshishige Shimamura, Mamoru Ugajin, Kenji Suzuki, Kazuyoshi Ono, Norio Sato, Kei Kuwabara, Hiroki Morimura, Shin'ichiro Mutoh
2004 — conf
Design techniques for a 1-V operation Bluetooth RF transceiver.
CICC
Mamoru Ugajin, Akihiro Yamagishi, Junichi Kodate, Mitsuru Harada, Tsuneo Tsukahara
2004 J jnl
Macromodels in the frequency domain analysis of microwave resonators.
IEEE J. Solid State Circuits
Mamoru Ugajin, Akihiro Yamagishi, Junichi Kodate, Mitsuru Harada, Tsuneo Tsukahara
2003 — conf
A 1-V 2.4-GHz FSK receiver with a complex BPF and a frequency doubler in CMOS/SOI.
CICC
Mamoru Ugajin, Tsuneo Tsukahara
2003 — conf
Design methodology of low-power CMOS RF-ICs.
ASP-DAC
Tsuneo Tsukahara, Mitsuru Harada, Mamoru Ugajin, Junichi Kodate, Akihiro Yamagishi
2002 J jnl
A 1-V 2-GHz RF Receiver with 49 dB of Image Rejection in CMOS/SIMOX.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Mamoru Ugajin, Junichi Kodate, Tsuneo Tsukahara