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[Author] Dat NGUYEN(2hit)

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  • A Low Power Buffer-Feedback Oscillator with Current Reused Structure

    Chang-Wan KIM  Dat NGUYEN  Jong-Phil HONG  

     
    BRIEF PAPER-Electronic Circuits

      Vol:
    E99-C No:12
      Page(s):
    1335-1338

    This paper presents a low power millimeter-wave oscillator consisting of a current-reused topology and buffer-feedback. By connecting a buffer-feedback topology between the core LC-tank of the oscillator and the output buffer stage, the simulated oscillation frequency of the proposed oscillator is increased by 17%, compared to that of the conventional current-reused oscillator. In addition, to obtain the same output power, the proposed oscillator reduces the power dissipation by 47%, compared to that of the conventional buffer-feedback oscillator. The prototype of the proposed oscillator is fabricated in a 65nm CMOS technology with a size of 700µm×480µm including pad. Measurement results indicate an oscillation frequency of 71.3GHz, while dissipating 10mA from a 1.6V supply.

  • Hole-Filling Algorithm with Spatio-Temporal Background Information for View Synthesis

    Huu-Noi DOAN  Tien-Dat NGUYEN  Min-Cheol HONG  

     
    PAPER

      Pubricized:
    2017/06/14
      Vol:
    E100-D No:9
      Page(s):
    1994-2004

    This paper presents a new hole-filling method that uses extrapolated spatio-temporal background information to obtain a synthesized free-view. A new background codebook for extracting reliable temporal background information is introduced. In addition, the paper addresses estimating spatial local background to distinguish background and foreground regions so that spatial background information can be extrapolated. Background holes are filled by combining spatial and temporal background information. Finally, exemplar-based inpainting is applied to fill in the remaining holes using a new priority function. The experimental results demonstrated that satisfactory synthesized views can be obtained using the proposed algorithm.