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Oct. 2007, Nov. 2007,Dec. 2007, 2008


Issue 11, Volume 6, November 2007
Print ISSN: 1109-2734 E-ISSN: 2224-266X







Title of the Paper:  Link-load Balance Aware Mapping and Routing for NoC


Authors: Zhou Wenbiao, Yan Zhang, Zhigang Mao

Abstract: The paper presents a novel mapping and routing technique for the mesh based NoC design problem with an objective of minimizing the energy consumption and normalized worst link-load. The proposed algorithm PLBMR is a particle swarm optimization (PSO) based two phases process, one is mapping core onto NoC to minimize the NoC communication energy consumption, and another is the allocation of routing path for keeping the link-load balance. and the paper presents the detail implementation of the PLBMR algorithm. Experimental results show that the proposed technique can reduce the normalized worst link-load by 20% on average while guarantee a low energy consumption.

Keywords: NoC, Mapping, Low-power, Link-balance, Routing

Title of the Paper: A Cross-Coupled Type AC-DC Converter for Remote Power
Feeding to a RFID Tag


Authors: Kei Eguchi, Takahiro Inoue, Ichirou Oota, Hongbing Zhu, Fumio Ueno

Abstract: In this paper, a cross-coupled type AC-DC converter for RFID tags is proposed. The converter consists of 2 charge-pump type AC-DC converters with opposite polarities. In conventional converters, the threshold voltage of a diode switch causes the decrease in power efficiency. By using cross-coupled connection of CMOS switches, the proposed converter can alleviate the influence of the threshold voltage. Hence, it can achieve an AC-DC conversion with high efficiency. Furthermore, the circuit size of the proposed converter is almost the same as that of the conventional circuit. Through SPICE simulations, the following characteristics are obtained: 1. the power efficiency is more than 88 % and 2. the electric power is about 5mW when an output load is 500 􀀀. Concerning the power efficiency and the ripple voltage, theoretical design formulas are derived. Furthermore, the validity of the circuit design is confirmed by experiments.

Keywords: AC-DC Converters, Switched-Capacitor Circuits, Charge-Pump Circuits, Power Converters, RFID Tags, RF Electromagnetic Induction

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