Výsledky vyhledávání - "Junji Wadatsumi"

A 12.8-Gb/s Daisy Chain-Based Downlink I/F Employing Spectrally Compressed Multi-Band Multiplexing for High-Bandwidth, Large-Capacity Storage Systems

Autor: Daisuke Miyashita, Yuji Satoh, Takashi Toi, Junji Wadatsumi, Makoto Morimoto, Jun Deguchi, Ryuichi Fujimoto, Yuta Tsubouchi, Fumihiko Tachibana

Publikováno v: IEEE Journal of Solid-State Circuits. 54:1086-1095

Toward the aim of realizing high-bandwidth, large-capacity nand flash memory-based storage systems, this paper presents a novel daisy-chain downlink interface (I/F) between a controller and a large number of nand packages. The daisy-chain I/F employs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47d6690b1626e08e5749bd868a84c086
https://doi.org/10.1109/jssc.2018.2889704

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30.3 A 25.6Gb/s Uplink-Downlink Interface Employing PAM-4-Based 4-Channel Multiplexing and Cascaded CDR Circuits in Ring Topology for High-Bandwidth and Large-Capacity Storage Systems

Autor: Hiroyuki Kobayashi, Mitsuyuki Ashida, Jun Deguchi, Yutaka Shimizu, Yuji Satoh, Go Urakawa, Rui Ito, Takashi Toi, Yuta Tsubouchi, Junji Wadatsumi, Mai Nozawa, Makoto Morimoto

Publikováno v: ISSCC

High-bandwidth (BW) and large-capacity storage systems with NAND Flash memory (hereinafter referred to as “NAND”) have been increasingly required for big data applications, such as the field of advanced biomedical science [1]. However, a conventi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6263e1fc464c87f6b14669f58606fcd8
https://doi.org/10.1109/isscc.2019.8662429

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Polar Antenna Impedance Detection and Tuning for Efficiency Improvement in a 3G/4G CMOS Power Amplifier

Autor: Shouhei Kousai, Kohei Onizuka, Junji Wadatsumi, Takashi Yamaguchi, Yasuhiko Kuriyama, Masami Nagaoka

Publikováno v: ISSCC

One of the ultimate goals in power amplifier design is to enhance the effective efficiency and achieve a long battery life. Therefore, both the peak efficiency and the efficiency loss due to antenna impedance mismatch or power back-off are highly cri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b6a7fdd7e7e055c3d3fc485541e03ac8
https://doi.org/10.1109/jssc.2014.2361322

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A Low-Noise and Highly-Linear Transmitter with Envelope Injection Pre-Power Amplifier for Multi-Mode Radio

Autor: Shouhei Kousai, Daisuke Miyashita, Mototsugu Hamada, Takahiro Sekiguchi, Kenichi Okada, Junji Wadatsumi, Rui Ito

Publikováno v: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. :592-602

A wideband, low noise, and highly linear transmitter for multi-mode radio is presented. Envelope injection scheme with a CMOS amplifier is developed to obtain sufficient linearity for complex modulation schemes such as OFDM, and to achieve low noise

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c032a28a259844c691c97621014eb06a
https://doi.org/10.1587/transfun.e94.a.592

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A Fully Integrated 2 $\times$ 1 Dual-Band Direct-Conversion Mobile WiMAX Transceiver With Dual-Mode Fractional Divider and Noise-Shaping Transimpedance Amplifier in 65 nm CMOS

Autor: Jun Deguchi, Daisuke Miyashita, Mototsugu Hamada, Shoko Oda, Yuki Tsuda, Junji Wadatsumi, Shunji Kawaguchi, Masaomi Iwanaga, Yosuke Ogasawara, Kenichi Sami, Gaku Takemura, Nobuyuki Itoh, Rui Ito

Publikováno v: IEEE Journal of Solid-State Circuits. 45:2774-2784

This paper presents a fully integrated 2 RX × 1 TX dual-band direct-conversion mobile WiMAX transceiver in a 65 nm CMOS technology. The frequency division ratios of 4 for the low band (2.3-2.7 GHz) and 8/3 for the high band (3.3-3.8 GHz) are employe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::511369607276a455fedd88757d4be3e4
https://doi.org/10.1109/jssc.2010.2075295

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19.3 66.3KIOPS-random-read 690MB/s-sequential-read universal Flash storage device controller with unified memory extension

Autor: Shouhei Kousai, Daisuke Miyashita, Nobuhiro Kondo, Takayuki Tamura, Yasuo Unekawa, Yukihito Oowaki, Junji Wadatsumi, Atsushi Kunimatsu, Kenichiro Yoshii, Shinsuke Fujii, Konosuke Watanabe, Toshio Fujisawa, Takuma Aoyama, Kenichi Maeda

Publikováno v: ISSCC

Mobile devices have made remarkable advances in recent years. They generally use embedded NAND storage devices, which are tiny (10s of millimeters square) and low-power (around 1W in the active state) single BGA packages that contain both a controlle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8116faca0786eb2d4f820be2575db1a
https://doi.org/10.1109/isscc.2014.6757456

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A fully integrated 2×1 dual-band direct-conversion transceiver with dual-mode fractional divider and noise-shaping TIA for mobile WiMAX SoC in 65nm CMOS

Autor: Shoko Oda, Junji Wadatsumi, Kenichi Sami, Daisuke Miyashita, Nobuyuki Itoh, Jun Deguchi, Rui Ito, Yuki Tsuda, Yosuke Ogasawara, Gaku Takemura, Mototsugu Hamada, Shunji Kawaguchi, Masaomi Iwanaga

Publikováno v: ISSCC

Mobile WiMAX complying with the IEEE 802.16e standard is one of the emerging standards and is achieving world-wide penetration. Low-cost implementation is essential and single-chip implementation is a straightforward approach. However, there are many

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a780f698a0035f92e05a28d2696fa0a6
https://doi.org/10.1109/isscc.2010.5433966

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A 1.2V 0.2-to-6.3GHz Transceiver with Less Than -29.5dB EVM@-3dBm and a Choke/Coil-Less Pre-Power Amplifier

Autor: M. Hamada, Shouhei Kousai, R. Ito, Daisuke Miyashita, Junji Wadatsumi, Asuka Maki, Takahiro Sekiguchi

Publikováno v: ISSCC

1.2 V 0.2-to-6.3 GHz transceiver for a multimode radio is fabricated in a 0.13 mum CMOS technology is proposed. The transmitter achieves EVM of less than -29.5 dB at -3 dBm output from 0.2 to 7.2 GHz while consuming 69 mW, where the modulation scheme

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a75af0c966943678d7c9e303f5107324
https://doi.org/10.1109/isscc.2008.4523133

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