IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
Volume 5 , Issue 13
Showing 1-4 articles out of 4 articles from the selected issue
LETTER
  • Armin Mehran, Ahmad Khademzadeh, Samira Saeidi
    2008 Volume 5 Issue 13 Pages 464-471
    Published: 2008
    Released: July 10, 2008
    JOURNALS FREE ACCESS
    In this paper, a heuristic Dynamic Spiral Mapping (DSM) algorithm for 2-D mesh topologies is proposed. Based on the DSM we have presented two different approaches: the Full Dynamic Spiral Mapping (FDSM) and the Partial Dynamic Spiral Mapping (PDSM).To compare the efficacy of the algorithm, the reconfiguration time of the FDSM and PDSM are compared. The experimental results of almost 100 simple and complex scenarios with synthetic traffic profiles reveal that in 82% of simulation cases, the PDSM has less reconfiguration time comparing to the FDSM.
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  • O-Sam Kwon, Yong-Jin Kwon, Ho-Jun Song, Kyeong-Sik Min
    2008 Volume 5 Issue 13 Pages 472-477
    Published: 2008
    Released: July 10, 2008
    JOURNALS FREE ACCESS
    In this letter, a simple but effective sense-amplifier driving circuit using adaptive delay line is proposed to suppress a high current peak occurring in enabling sense amplifiers at a fast Process-VDD-Temperature (PVT) condition. And, this circuit also can improve a slow enabling time of sense amplifiers at a slow PVT corner. This new circuit is verified in recent 0.18-µm DRAM technology, where the variations in the sense-amplifier enabling time and peak current are suppressed from 72% to 1% and 240% to 28%, respectively, compared with the previous sequential sense-amplifier driving circuit.
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  • Kenichi Ohhata, Yuichiro Shimizu, Kiichi Yamashita
    2008 Volume 5 Issue 13 Pages 478-482
    Published: 2008
    Released: July 10, 2008
    JOURNALS FREE ACCESS
    This paper describes a feedthrough reduction technique for a track-and-hold (T/H) circuit with a body-bias control circuit. We propose a T/H circuit with a feedthrough canceller. This circuit cancels a leaking signal to the output node through the parasitic capacitance by using an opposite-phase signal. The simulation results using 90-nm CMOS technology demonstrate a feedthrough of -89.4dB and SFDR of 66dB at a sampling frequency of 5GHz.
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  • Jong-Man Kim, Sanghyo Lee, Chang-Wook Baek, Youngwoo Kwon, Yong-Kweon ...
    2008 Volume 5 Issue 13 Pages 483-489
    Published: 2008
    Released: July 10, 2008
    JOURNALS FREE ACCESS
    This paper demonstrates a micromachined two-state switchable bandpass filter operating at 2.4 and 5.2GHz. The proposed filter is monolithically composed of two single-crystal silicon (SCS) single-pole double-throw (SPDT) RF MEMS switches and two kinds of two-pole LC-resonators, and it is fabricated by a robust silicon on glass (SiOG) process that combines various micromachining technologies. The insertion losses for each output port of the fabricated SPDT switch was less than 0.15dB up to 5GHz. The input to output isolations were higher than 31dB for each port. The measured center frequencies of the fabricated reconfigurable filter were 2.9 and 5.4GHz, and the measured passband losses were 2.43 and 5.51dB in the low and high frequency bands, respectively.
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