IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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Volume 4, Issue 10
Displaying 1-6 of 6 articles from this issue
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LETTER
  • Adaptive motion artifacts reduction algorithm for ECG signal in textile wearable sensor
    Sung Won Yoon, Hang Sik Shin, Se Dong Min, Myoungho Lee
    2007 Volume 4 Issue 10 Pages 312-318
    Published: 2007
    Released on J-STAGE: May 25, 2007
    DOIhttps://doi.org/10.1587/elex.4.312
    JOURNAL FREE ACCESS
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    For ubiquitous healthcare system, it is very important to measure a bio-signal without any discomfort. The electro-conductive fabric can be a good application for biomedical sensor. However, it is difficult to measure the bio-signal because of its sensitivity variation caused by contact impedance change, especially by motion of the subject. In this paper, adaptive noise reduction algorithm on motion artifacts is described to measure electro-cardiogram using lead II configuration conducted with both Ag/AgCl electrode as a reference signal and electro-conductive fabric.
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  • Fabrication and measurements of direct contact type RF MEMS switch
    Jae-Hyoung Park
    2007 Volume 4 Issue 10 Pages 319-325
    Published: 2007
    Released on J-STAGE: May 25, 2007
    DOIhttps://doi.org/10.1587/elex.4.319
    JOURNAL FREE ACCESS
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    This paper reports on the fabrication and measurements of a direct contact type RF MEMS switch. The switch is driven by the electrostatic force making the pass-through state with metal-to-metal direct contact. The actuation pad is connected with support beams to reduce switch deformation and increase contact force. The insertion loss and isolation of the switch have been measured and compared with the characteristics of the switch without support beams. The switch shows the isolation of 15.5dB and the insertion loss of 0.34dB at 50GHz with an applied DC bias of 35V. The switching time is measured to be 5.1µs. Power handling capability and reliability of the fabricated switch have been discussed.
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  • A bridge resistance deviation-to-time interval converter for resistive sensor bridges
    Hoon Kim, Won-Sup Chung, Sang-Hee Son, Hee-Jun Kim
    2007 Volume 4 Issue 10 Pages 326-331
    Published: 2007
    Released on J-STAGE: May 25, 2007
    DOIhttps://doi.org/10.1587/elex.4.326
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    A bridge resistance deviation-to-time interval converter is presented for interfacing resistive sensor bridges. It consists of two voltage-to-current converters, two current-tunable Schmitt triggers, a ramp integrator, and two logic gates. A prototype circuit built using discrete components exhibits a conversion sensitivity amounting to 4527.8µs/Ω over the resistance deviation range of 0-2Ω and a linearity error less than ± 0.01%.
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  • Degradable mesh-based on-chip networks using programmable routing tables
    Ali Shahabi, Nima Honarmand, Hassan Sohofi, Zainalabedin Navabi
    2007 Volume 4 Issue 10 Pages 332-339
    Published: 2007
    Released on J-STAGE: May 25, 2007
    DOIhttps://doi.org/10.1587/elex.4.332
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    The decreasing manufacturing yield of integrated circuits, as a result of rising complexity and decreased feature size, and the emergence of NoC-based design techniques, has necessitated the search for network reconfiguration techniques for reusing NoCs with faulty communication hardware. In this paper, we propose a method to cope with the problem of faulty communication links in mesh-based NoCs. The method is based on the use of programmable routing tables, which has a fixed number of entries, in network switches. Experimental results show that a network reconfigured for fault masking by programming its routing tables has acceptable but degraded performance parameters as compared to the non-faulty network.
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  • A tilted angle polarization type piezoelectric transducer for plate wave generation
    Kazuhiko Imano
    2007 Volume 4 Issue 10 Pages 340-343
    Published: 2007
    Released on J-STAGE: May 25, 2007
    DOIhttps://doi.org/10.1587/elex.4.340
    JOURNAL FREE ACCESS
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    A tilted angle polarization type piezoelectric transducer (TAPP) is newly suggested to generate the Lamb waves in thin plate without wedge. The tilted angle between the TAPP and the aluminum plate is easily determined by Snell's law. Our new type TAPP with a tilted angle of 50° for S0 mode Lamb wave generation was specially manufactured. Preliminary experiments have been performed to examine the usefulness of our TAPP. As a result, efficient radiation of S0 mode Lamb wave from TAPP was confirmed and was clearly identified by the wavelet transform analysis.
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