Search Results:　 1-20 of 294

  • 1

    High Power DC--DC Conversion Applications of Disk-Type Radial Mode Pb(Zr,Ti)O<sub>3</sub> Ceramic Transducer

    Moon Sol , Park Joung-Hu

    … In this paper, a new application of magnetic-less high-power DC--DC switching converter with an Pb(Zr,Ti)O<sub>3</sub> … For the full elimination of magnetic devices from the high power application, this paper presents a resonant-type step-down DC--DC power converter employing a disk-type piezoelectric transducer, along with the demonstration of the design process and the hardware-experiment results. …

    Jpn J Appl Phys 50(9), 09ND20-09ND20-6, 2011-09-25

    The Japan Society of Applied Physics

  • 2

    C-3-78 Analysis of Scattering Losses in Vertically Down-Tapered Spot-Size Converter  [in Japanese]

    Yoda Hidehiko , Shiraishi Kazuo

    Proceedings of the Society Conference of IEICE 2011年_エレクトロニクス(1), 200, 2011-08-30

    CiNii Fulltext PDF - Limited 

  • 3

    Output Voltage Ripple Suppression of High Step Down Voltage Ratio DC-DC Converter with Coupled Inductor  [in Japanese]

    WATANABE Jun , OKAMOTO Masayuki , HIRAKI Eiji , TANAKA Toshihiko

    近年,高性能CPUの駆動電圧は低電圧化の傾向がある.このため,これらのCPUに電力を供給するDC-DCコンバータには高い降圧比が要求される.筆者らは先に,結合インダクタを有する降圧形DC-DCコンバータを提案し,その有効性をシミュレーションおよび実験により評価・検討してきた.提案回路はスイッチング素子のduty飴ctorが大きくても高い降圧比を実現できるが,出力電圧に大きなリプルが重畳する問題があ …

    Technical report of IEICE. Energy engineering in electronics and communications 111(72), 41-46, 2011-05-20

    CiNii Fulltext PDF - Limited 

  • 4

    Maximum Power Point Tracking Converter Using a Limited General Regression Neural Network  [in Japanese]

    YAMAUCHI Koichiro

    筆者は既に,は組み込み機器向け神経回路:Limited General Regression Neural Network(LGRNN)を提案した.LGRNNはGeneral Regression Neural Networkに中間ユニット数を一定個数に制限する機能を加えたものである.学習初期は通常のGRNNと同様に,新しいユニットを割付ることで学習していくが,中間ユニット数が上限に達すると,最も …

    IEICE technical report. Neurocomputing 110(461), 41-46, 2011-02-28

    CiNii Fulltext PDF - Limited 

  • 5

    C-3-61 A spot-size converter for Si-wire waveguides employing a vertical down taper  [in Japanese]

    Nagata Yutaka , Someya Takayuki , Yoda Hidehiko , Shiraishi Kazuo

    Proceedings of the IEICE General Conference 2011年_エレクトロニクス(1), 236, 2011-02-28

    CiNii Fulltext PDF - Limited 

  • 6

    Performance Evaluation of π/4 DQPSK Wireless System with Direct-conversion  [in Japanese]

    YOKOTA Yuji , YOSHIDA Takuro , NOJIMA Daisuke , NAGAO Yuhei , OCHI Hiroshi , ISHIKAWA Akira , FUKAGAWA Shugo , TAHIRA Akihiro

    無線通信機の低コスト化を目指し,ダイレクトコンバージョン方式受信機が近年注目を集めている.しかし,ダイレクトコンバージョン方式受信機では,直交復調器の不完全性に起因する同相成分と直交成分の直交誤差によってI/Qインバランス(I/Q imbalanice:IQI)が発生する.加えて,送受信機間の発振器の周波数誤差によりキャリア周波数オフセット(Carrier Frequency Offset:CFO …

    IEICE technical report. Communication systems 110(441), 393-394, 2011-02-24

    CiNii Fulltext PDF - Limited 

  • 7

    Performance Evaluation of π/4 DQPSK Wireless System with Direct-conversion  [in Japanese]

    YOKOTA Yuji , YOSHIDA Takuro , NOJIMA Daisuke , NAGAO Yuhei , OCHI Hiroshi , ISHIKAWA Akira , FUKAGAWA Shugo , TAHIRA Akihiro

    無線通信機の低コスト化を目指し,ダイレクトコンバージョン方式受信機が近年注目を集めている.しかし,ダイレクトコンバージョン方式受信機では,直交復調器の不完全性に起因する同相成分と直交成分の直交誤差によってI/Qインバランス(I/Q imbalanice:IQI)が発生する.加えて,送受信機間の発振器の周波数誤差によりキャリア周波数オフセット(Carrier Frequency Offset:CFO …

    IEICE technical report. Circuits and systems 110(439), 393-394, 2011-02-24

    CiNii Fulltext PDF - Limited 

  • 8

    Performance Evaluation of π/4 DQPSK Wireless System with Direct-conversion  [in Japanese]

    YOKOTA Yuji , YOSHIDA Takuro , NOJIMA Daisuke , NAGAO Yuhei , OCHI Hiroshi , ISHIKAWA Akira , FUKAGAWA Shugo , TAHIRA Akihiro

    無線通信機の低コスト化を目指し,ダイレクトコンバージョン方式受信機が近年注目を集めている.しかし,ダイレクトコンバージョン方式受信機では,直交復調器の不完全性に起因する同相成分と直交成分の直交誤差によってI/Qインバランス(I/Q imbalanice:IQI)が発生する.加えて,送受信機間の発振器の周波数誤差によりキャリア周波数オフセット(Carrier Frequency Offset:CFO …

    電子情報通信学会技術研究報告. SIP, 信号処理 : IEICE technical report 110(440), 393-394, 2011-02-24

    CiNii Fulltext PDF - Limited 

  • 9

    Design and Modeling of a High Efficiency Step-Up/Step-Down DC-DC Converter with Smooth Transition

    MA Yanzhao , WANG Hongyi , CHEN Guican

    … This paper presents a step-up/step-down DC-DC converter with three operation modes to achieve high efficiency and small output ripple voltage. … Besides, the novel control scheme minimizes the conduction loss by reducing the average inductor current and the switching loss by making the converter operate like a buck or boost converter. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 94(2), 646-652, 2011-02-01

    J-STAGE CrossRef References (13)

  • 10

    Proposal of A Novel Forward Type DC/DC Converter Suitable for Low Output Voltage  [in Japanese]

    ITOH Hiroaki , HIRACHI Katuya

    電気学会研究会資料. SPC, 半導体電力変換研究会 2011(25), 101-105, 2011-01-21

    References (3)

  • 11

    Design and FPGA implementation of digital pulse compression for HF chirp radar based on modified orthogonal transformation

    Wang Fan , Gao Huotao , Zhou Lin , Zhou Qingchen , Shi Jie , Sun Yuxiang

    The paper presents a digital pulse compression approach for high frequency (HF) chirp radar. The emphasis is to accomplish echo signal de-chirp operation by modified orthogonal transformation on field …

    IEICE Electronics Express 8(20), 1736-1742, 2011

    J-STAGE CrossRef

  • 12

    Properties of Creeping Discharge in Narrow Gap between Dielectric Plates in PFAE Oil

    Usui Takuro , Hanaoka Ryoichi , Takata Shinzo , Kanamaru Yasunori , Koide Hidenobu , Nakagami Yoshitake

    … The discharge shapes and the streamer lengths were observed using a still camera equipped with a night viewer and the progression steps of the streamer were observed using a high-speed image converter camera. … The streamers in both polarities also slow down its velocity because of a narrow gap with two solid interfaces. …

    IEEJ Transactions on Fundamentals and Materials 131(10), 817-823, 2011

    J-STAGE CrossRef

  • 13

    Low-Latency Digital-IF Scheme Using an IIR Polyphase Filter Structure for Delay-Sensitive Repeater Systems

    CHANG Hyung-Min , YANG Jun-Seok , LEE Won-Cheol

    … Furthermore, in order to linearize the phase response of the designed IIR filter, this paper also introduces an all-pass filter cascaded with the IIR filter for digital down-conversion as well as up-conversion. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E94.A(8), 1715-1723, 2011

    J-STAGE CrossRef

  • 14

    Energy dissipation decrease during adiabatic charging of a capacitor by changing the duty ratio

    Nakata Shunji , Makino Hiroshi , Mutoh Shin'ichiro , Miyama Masayuki , Matsuda Yoshio

    … Adiabatic charging of a capacitor with a step down converter by changing the duty ratio is considered. … First, for a profound understanding of the circuit, the general analytical solution of step down converter is considered. … Adiabatic charging of a capacitor with a step down converter by changing the duty ratio is considered. …

    Midwest Symposium on Circuits and Systems, 6026367, 2011

    IR CrossRef

  • 15

    IF filter research for next generation wireless transceiver

    Patrick Ben , Konishi Takayuki , Kashimura Toru , Masui Shoichi

    … 本報告では、General ImpedImce Converter(GIC)で実現されるFrequency Dependant Negative Resistor(FDNR)フィルタを利用し、妨害信号に強く、低消費電力化を実現可能な、無線受信回路のRFダウンコンバージョン方法の解析と、その実現方法について研究する。 …

    Technical report of IEICE. ICD 110(344), 37-42, 2010-12-09

    CiNii Fulltext PDF - Limited 

  • 16

    A Step-Down Converter Applied Proposed Switching Transient Waveform Modification  [in Japanese]

    MORI Takao , IGARASHI Tomohiko , FUNATO Hirohito , OGASAWARA Satoshi , HARA Mitsuo , HIROTA Yukitsugu

    電気学会研究会資料. SPC, 半導体電力変換研究会 2010(120), 11-16, 2010-11-25

    References (11)

  • 17

    Physical Modeling Study on Combined Side and Top Blowing AOD Refining Process of Stainless Steel : Back-attack Phenomenon of Gas Streams with Horizontal Side Blowing and Its Influence on Erosion and Wear of Refractory Lining

    WEI Ji-He , ZHU Hong-Li , JIANG Qing-Yuan , SHI Guo-Min , CHI He-Bing , WANG Hai-Jiang

    … The back-attack phenomenon of the gas side blowing streams and its influence on the erosion and wear of the refractory lining during the combined side and top blowing AOD refining process of stainless steel were investigated on a water model unit of a 120 t AOD converter. … At a given tuyere number, properly increasing the angle between each tuyere could be beneficial to alleviating the back-attack and to slowing down the erosion and wear of the lining. …

    ISIJ International 50(10), 1347-1356, 2010-10-15

    J-STAGE CrossRef References (27)

  • 18

    A Two-Phase High Step Down Coupled-Inductor Converter for Next Generation Low Voltage CPU  [in Japanese]

    MATSUMOTO Kento , NISHIJIMA Kimihiro , SATO Terukazu , NABESHIMA Takashi

    筆者達は,次世代の低電圧CPU用電源として,2相式4倍降圧カップルドインダクタコンバータを提案している.本回路は,電圧変換率がVo/Vi=D/4となるので,降圧形コンバータと比べ4倍の降圧比が得られる.また,スイッチ素子がスイッチングする時の電圧が入力電源電圧の4分の1となるため大幅にスイッチング損失とスイッチングノイズを低減できる.スイッチ素子にかかる最大電圧も従来方式に比べて,メインスイッチが …

    Technical report of IEICE. Energy engineering in electronics and communications 110(218), 13-19, 2010-10-01

    CiNii Fulltext PDF - Limited  References (6)

  • 19

    Proposal of a Wide-band and High Dynamic Range Receiver for Flexible Wireless Systems  [in Japanese]

    KAHO Takana , YAMAGUCHI Yo , SHIBA Hiroyuki , LEE Doohwan , YAMADA Takayuki , KAWASHIMA Munenari , UEHARA Kazuhiro

    電気学会研究会資料. EMT, 電磁界理論研究会 2010(62), 199-204, 2010-07-29

    References (14)

  • 20

    Analysis of a Buck Type DC-DC Converter with a Coupled Inductor  [in Japanese]

    WATANABE Jun , OKAMOTO Masayuki , HIRAKI Eiji , TANAKA Toshihiko

    電気学会研究会資料. SPC, 半導体電力変換研究会 2010(99), 105-110, 2010-07-29

    References (3)