Mamoru Ugajin - researchr alias

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Viewing Publication 1 - 19 from 19

2023

A Study of Phase-Adjusting Architectures for Low-Phase-Noise Quadrature Voltage-Controlled OscillatorsMamoru Ugajin, Yuya Kakei, Nobuyuki Itoh. ieicetc, 106(2):59-66, February 2023. [doi]

2021

A quadrature voltage-controlled oscillator using phase-adjusting architecture for suppressing phase noiseMamoru Ugajin, Yuya Kakei, Nobuyuki Itoh. ieiceee, 18(10):20210173, 2021. [doi]

2018

Novel Access Control Scheme with Collision Detection Utilizing MIMO Transmission Procedure in WLAN SystemsTakefumi Hiraguri, Kentaro Nishimori, Yoshiaki Morino, Mamoru Ugajin, Hideaki Yoshino. ieicet, 101-B(7):1561-1574, 2018. [doi]

2017

2)-Mixer Architecture for a High-Image-Rejection Wireless Receiver with an N-Phase Active Complex FilterMamoru Ugajin, Takuya Shindo, Tsuneo Tsukahara, Takefumi Hiraguri. ieicet, 100-A(4):1008-1014, 2017. [doi]

2015

High-image-rejection wireless-receiver architecture with a 3-phase active RC complex filterMamoru Ugajin, Yuta Kobayashi, Tsuneo Tsukahara. ieiceee, 12(12):20150329, 2015. [doi]

Image-rejection-performance assessment of double-conversion wireless receiver with 3-phase complex filter using Montecarlo simulationMamoru Ugajin, Takuya Shindou. iscit 2015: 299-302 [doi]

2013

A 280-MHz CMOS Intra-Symbol Intermittent RF Front End for Adaptive Power Reduction of Wireless Receivers According to Received-Signal Intensity in Sensor NetworksMitsuo Nakamura, Mamoru Ugajin, Mitsuru Harada. ieicet, 96-C(1):93-101, 2013. [doi]

2012

Third-Harmonic Envelope Feedback Method for High-Efficiency Linear Power AmplifiersShoichi Oshima, Mamoru Ugajin, Mitsuru Harada. ieicet, 95-C(4):713-716, 2012. [doi]

Proposal of channel-grouping wireless-transceiver architecture for suppressing local-oscillator phase noiseMamoru Ugajin. ieiceee, 9(2):86-91, 2012. [doi]

2011

2010

Nano-watt power management and vibration sensing on a dust-size batteryless sensor node for ambient intelligence applicationsToshishige Shimamura, Mamoru Ugajin, Kenji Suzuki, Kazuyoshi Ono, Norio Sato, Kei Kuwabara, Hiroki Morimura, Shin'ichiro Mutoh. isscc 2010: 504-505 [doi]

2004

Design techniques for a 1-V operation Bluetooth RF transceiverMamoru Ugajin, Akihiro Yamagishi, Junichi Kodate, Mitsuru Harada, Tsuneo Tsukahara. cicc 2004: 393-400 [doi]

Macromodels in the frequency domain analysis of microwave resonatorsMamoru Ugajin, Akihiro Yamagishi, Junichi Kodate, Mitsuru Harada, Tsuneo Tsukahara. jssc, 39(4):569-576, 2004. [doi]

2003

Design methodology of low-power CMOS RF-ICsTsuneo Tsukahara, Mitsuru Harada, Mamoru Ugajin, Junichi Kodate, Akihiro Yamagishi. aspdac 2003: 394-399 [doi]

A 1-V 2.4-GHz FSK receiver with a complex BPF and a frequency doubler in CMOS/SOIMamoru Ugajin, Tsuneo Tsukahara. cicc 2003: 151-154 [doi]

2002

A 1-V 2-GHz RF Receiver with 49 dB of Image Rejection in CMOS/SIMOXMamoru Ugajin, Junichi Kodate, Tsuneo Tsukahara. ieiceta, 85-A(2):293-299, 2002. [doi]

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