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The most important design factor for portable devices is power consumption. In this paper, in the early design stage of a mobile device which measures temperature and humidity a power consumption model will be proposed and then the overall power consumption will be estimated based on this model. We will verify previously the correctness of such estimated power consumption before implementation of the real device. That is our proposed design methodology based on power consumption model. An improved design method for efficiently reducing the current consumption in the idle mode is also presented. By implementing a real prototype of the mobile device for measuring temperature and humidity, the correctness of our proposed design methodology based on power consumption modeling will be verified. Key Words : Humidity, Low-power consumption, Portable device, Power consumption modeling, Temperature.     (2013) . * Corresponding Author : Youn-Sik Hong(Incheon National Univ.) Tel: +82-32-835-8495 email: yshong@incheon.ac.kr Received December 5, 2013 Revised (1st January 13, 2014, 2nd February 4, 2014) Accepted February 5, 2014

A Low-Power Design and Implementation of the Portable Device for Measuring Temperature and Humidity Based On Power Consumption Modeling