IEEJ Transactions on Sensors and Micromachines
Online ISSN : 1347-5525
Print ISSN : 1341-8939
ISSN-L : 1341-8939
Neo-Transmitter Using Pulse Width Modulation (PWM) Method for Wireless Smart Sensors
Wang Hoon LeeJong-Wan KimHidekuni TakaoKazuaki SawadaMakoto Ishida
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2008 Volume 128 Issue 1 Pages 7-11


The wireless smart sensors have been proposed not only for high-risk and chronically ill patients but also in the healthcare field. The radio frequency (RF) transmitter is necessary to fabricate wireless smart sensors. This paper presents a proposal of the complementary metal-oxide-semiconductor (CMOS) RF transmitter using pulse width modulation (PWM) method. The major advantage of the PWM is a performance with low consumption power. In this paper, we designed and simulated the circuitry for the transmitter. The proposed transmitter consists of pulse width modulator, oscillator and on-chip antenna. With the transmitter using PWM method, it will be possible that wireless smart sensor perform with lower power consumption than the RF transmitter using conventional ring oscillator.

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© 2008 by the Institute of Electrical Engineers of Japan
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