Search Results:　 1-20 of 609

1

Update of the Experiment Materials of "Negative Resistance Oscillator" in Electrical & Electronic Engineering for Engineering Education (5): Numerical Simulation of Bonhoeffer-Van der Pol Equation [in Japanese]

KAWAKAMI Makoto , MOCHIZUKI Kouji , FUNADA Toshio , MUHAMMADIZZAT Bin Mohd Idrus , KANEKO Yuya , SUZUKI Shu , OHNUMA Takumi , AOKI Yusuke , OHBA Katsuhisa

… The education material updated here is "Negative Resistance Oscillator" with tunneldiode and provides students with the guide lines for Nonlinear Dynamical System and Chaos Engineering and with problemsto obtain problem-solving techniques and skills and to study new items of nonlinear electric and electronic circuits,which yield representatively chaotic behavior or limit cycles. …

Memoirs of Numazu College of Technology 47, 189-194, 2013-01-31

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2

Extraction Method for Substrate-Related Components of Vertical Junctionless Silicon Nanowire Field-Effect Transistors and Its Verification on Radio Frequency Characteristics

Shin Sunhae , Kang In Man , Kim Kyung Rok

… We introduce the substrate-related components such as the substrate resistance (R_{\text{sub}}) and drain-to-substrate capacitance (C_{\text{sub}}), and evaluate the RF performance such as f_{\text{t}}, f_{\text{max}}, gate input capacitance, and transport time delay. …

Jpn J Appl Phys 51(6), 06FE20-06FE20-7, 2012-06-25

The Japan Society of Applied Physics
3

Degradation phenomenon of electrical contacts using hammering oscillating mechanism and micro-sliding mechanism : Contact Resistance and its Model (21) [in Japanese]

和田真一 , 越田圭治 , ノロブリンサインダー他

電子情報通信学会技術研究報告 : 信学技報 112(61), 13-18, 2012-05-25
4

Automatic gain adjustment of motor control system based on modified ultimate sensitivity method(<Special Issue>the 23rd Symposium on Electromagnetics and Dynamics) [in Japanese]

ANDO Yoshinori , NAKAZAWA Yuu , KOGURE Susumu , MURAKAMI Iwanori , YAMADA Kou

Journal of the Japan Society of Applied Electromagnetics 20(1), 15-20, 2012-03-10

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5

Implementation of Tamper-Resistant Cryptographic DES Circuit using Dual-Rail RSL Memory [in Japanese]

SHIBATANI Megumi , IWAI Katsuhiko , SHIOZAKI Mitsuru , ASAGAWA Shunsuke , FUJINO Takeshi

近年,秘密情報を扱う暗号回路に対して,差分電力解析(Differential Power Analysis:DPA)に代表されるサイドチャネル攻撃の脅威が指摘されている.そのため,LSI設計時にはDPA耐性を考慮した設計が求められ,多くの手法が提案されている.我々は小面積,低消費電力なDPA対策手法として,Dual-Rail RSLメモリ方式を提案している.この手法では,暗号回路内の線形回路に対し …

Technical report of IEICE. VLD 111(450), 31-36, 2012-02-28

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6

Impact of Gate Poly Depletion on Evaluation of Channel Temperature in Silicon-on-Insulator Metal--Oxide--Semiconductor Field-Effect Transistors with Four-Point Gate Resistance Measurement Method

Beppu Nobuyasu , Takahashi Tsunaki , Ohashi Teruyuki , Uchida Ken

… Self-heating effects (SHEs) in silicon-on-insulator (SOI) metal--oxide--semiconductor field-effect transistors (MOSFETs) is evaluated and an accurate measurement method for device temperature is developed using the four-point gate resistance measurement method. … The measurements of gate resistance under various biases revealed that the depletion of the polysilicon gate had a significant impact on gate resistance. …

Jpn J Appl Phys 51(2), 02BC15-02BC15-5, 2012-02-25

The Japan Society of Applied Physics
7

Cooled Cu Pickup Coil Coupled to HTS SQUID for High Sensitive Measurement of AC Magnetic Field [in Japanese]

MOMOTOMI Ryuji , MIHAYA Takuro , MATSUO Masaaki , YOSHIDA Takashi , ENPUKU Keiji

高感度な交流磁場測定のため、液体窒素温度T=77Kに冷却した銅検出コイルの性能評価を行なった。コイルは高周波でのコイル抵抗の増加を低減するためにリッツ線で作製した。まず、リッツ線の素線径d_fを0.2mmから0.04mmに変化させたときのDC〜100kHzの周波数域でのコイルの特性を測定し、素線径d_fを小さくしたときに高周波でのコイル特性が改善されることを示した。次に、平均直径D=50mm、巻数 …

Technical report of IEICE. SCE 111(418), 29-34, 2012-01-19

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8

Degradation phenomenon of electrical contacts using hammering oscillating mechanism and micro-sliding mechanism : Contact Resistance and its Model (20) [in Japanese]

WADA Shin-ichi , KOSHIDA Keiji , KAWANOBE Masahiro , NOROVLING Saindaa , MASUDA Naoki , ISHIGURO Akira , YANAGI Kunio , KUBOTA Hiroaki , SAWA Koichiro

著者らは,電気接点に実用的振動を与えうるいくつかの加振機構を開発し,微小振動が接触抵抗に与える影響を考察できる可能性を検討してきた.本論文では,改良した微摺動機構を用いて,機構への入力波形・ピン間摩擦力・機構の摺動振幅の間の相関について検討した.電気接点の抵抗における変動を起こした摺動振幅には下限的臨界点が存在することが示唆された.この摺動振幅データには阻害要因が存在するので,今後,振幅に関するさ …

IEICE technical report. EMD 111(391), 1-6, 2012-01-13

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9

High Power X-band 200W AlGaN/GaN HEMT [in Japanese]

Nishihara M. , Yamamoto T. , Mizuno S. , Sano S. , Hasegawa Y.

X帯高出力アプリケーション用に200W GaN HEMTデバイスを開発した。そのデバイスはゲート長0.4um、ゲート幅16mmのチップを4合成し、入出力共2段でインピーダンス変換し50ohm整合したデバイスである。我々の開発したGaN HEMTデバイスはf=9.3GHz、Vds=32V、パルス動作で線形利得12dB、最大飽和出力電力204W、電力負荷効率32%を達成したので報告する。

IEICE technical report. Microwaves 111(374), 121-123, 2012-01-04

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10

High Power X-band 200W AlGaN/GaN HEMT [in Japanese]

Nishihara M. , Yamamoto T. , Mizuno S. , Sano S. , Hasegawa Y.

X帯高出力アプリケーション用に200W GaN HEMTデバイスを開発した。そのデバイスはゲート長0.4um、ゲート幅16mmのチップを4合成し、入出力共2段でインピーダンス変換し50ohm整合したデバイスである。我々の開発したGaN HEMTデバイスはf=9.3GHz、Vds=32V、パルス動作で線形利得12dB、最大飽和出力電力204W、電力負荷効率32%を達成したので報告する。

IEICE technical report. Electron devices 111(373), 121-123, 2012-01-04

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11

Toward Effective Countermeasures against an Improved Fault Sensitivity Analysis

LI Yang , OHTA Kazuo , SAKIYAMA Kazuo

… Our countermeasure is proposed based on the WDDL technique due to its built-in resistance against both the power-based attack and differential fault analysis. … This paper first proposes an improved fault sensitive analysis that can threat a well-implemented WDDL-AES based on the input-data dependency for the critical path delay of WDDL S-box. …

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 95(1), 234-241, 2012-01-01

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12

Evaluation of a Lock-in-Amplifier-Based Spectral Induced Polarization Method for Soil Characterization

A. MOJID Mohammad , CHO Hiroyuki , MIYAMOTO Hideki

… An input current density of 0.35 A/m2 induced negligible noise in φ(ω) and was found optimum for the method. … The resistance-dependent response of the circuit elements affected the phase and impedance spectra of the RC circuit, and hence a correction for the system's transfer function was employed. …

Environment Control in Biology 50(4), 363-374, 2012

J-STAGE CrossRef
13

Effects of Non-Condensable Gases on Heat Transfer Performance of Loop Thermosyphon for CPU Cooling [in Japanese]

TOYODA Hiroyuki , KONDO Yoshihiro , 佐藤重匡 , 椿繁裕

… The effect of NCG's amount was measured for each component of the loop thermosyphon while changing the amount of heat input. … The overall thermal resistance of a loop thermosyphon increased with the amount of NCG. … The thermal resistance of the condensing part particularly increased with the NCG. …

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 78(795), 2030-2045, 2012

J-STAGE CrossRef
14

Generation of Tactile Feeling through the Frictional Torque of Magnetic Particle Brakes [in Japanese]

KAEDE Kazunori , 綿貫啓一

… In this paper, we describe our prototype of a manual control input device which can display resistance torque. … The magnetic particle brakes provide the resistance torque that is proportional to the change in the excitation current passing through a coil of the element. …

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 78(796), 3855-3865, 2012

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15

Dissimilar Joining between SPCC Steel and A6061 Aluminium Alloy by Various Joining Methods

HASEGAWA Toshiyuki , OKUBO Michinori

… Namely, in order to change heat input conditions, GTAW, resistance spot welding and friction stir spot welding were applied. … On the other hand, in resistance spot welding and friction stir spot welding, namely, in the case of smaller heat input conditions, formation of IMC(indentified as Fe3Al, FeAl, FeAl3 in resistance spot welding) and cracks in welds were inhibited and mechanical properties were improved. …

Journal of Light Metal Welding 50(3), 101-109, 2012

J-STAGE
16

Design of Approximate 2-Degree-of-Freedom Digital Controller for a Boost DC-DC Converter

OHTA Yoshihiro , HIGUCHI Kohji

… If a duty ratio, a load resistance and an input voltage in a boost DC-DC converter are changed, the dynamic characteristics are varied greatly, that is, the boost DC-DC converter has non-linear characteristics. …

IEICE Transactions on Electronics E95.C(11), 1810-1816, 2012

J-STAGE CrossRef
17

Study on Laser Beam Welding Technology for Nuclear Power Plants [in Japanese]

CHIDA Itaru , SHIIHARA Katsunori , 福田健 , 河野渉 , 小畑稔 , 森島康雄

… Laser cladding is a technique to weld the corrosion resistant metal onto a substrate surface by feeding filler wire to improve the corrosion resistance. … Temper-bead welding is the heat input process to provide the desired microstructure properties of welded low alloy steels without post weld heat treatment, by inducing proper heat cycle during laser welding. …

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 78(787), 445-449, 2012

J-STAGE CrossRef
18

Low-voltage differential voltage follower for WTA and fully differential applications

Padilla-Cantoya Ivan , Furth Paul M. , Molinar-Solis Jesus E. , Diaz-Sanchez Alejandro

… The proposed circuit is very compact, and symmetric with respect to the input devices. … Both differential input devices are enhanced by local shunt feedback, increasing the gain and, thus, reducing the output resistance for higher precision. …

IEICE Electronics Express 9(6), 491-495, 2012

J-STAGE CrossRef
19

A low-variation on-resistance CMOS sampling switch for high-speed high-performance applications

Asgari MohammadReza , Hashemipour Omid

… Thus, results in a low-variation low-value on-resistance switch. … Using this idea, the proposed switch considers reliability constrains, and operates in full-swing input range. … Simulation results show that proposed switch achieves on-resistance variation of less than 4% through full-range input signal. …

IEICE Electronics Express 9(5), 339-345, 2012

J-STAGE CrossRef
20

Degradation Phenomenon of Electrical Contacts using a Micro-Sliding Mechanism : Minimal Sliding Amplitudes estimated under some conditions by the Mechanism (18)

WADA Shin-ichi , KOSHIDA Keiji , KAWANOBE Mashahiro , NOROVLING Saindaa , MASUDA Naoki , ISHIGURO Akira , YANAGI Kunio , KUBOTA Hiroaki , SAWA Koichiro

… Using the above mechanisms and their models they have studied the influences of a micro-oscillation on contact resistance. … Using the results the authors discussed the degradation phenomena in shorter term, about a day, on four types of conditions that the input waveform as external force was sinusoidal or rectangular and frictional force between male-pins and female-pins in a connector was usual or smaller. …

IEICE technical report. EMD 111(299), 189-194, 2011-11-10

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