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An integrated microsystem for 3-D magnetic field measurements

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2 Author(s)
P. Malcovati ; Dept. of Electr. Eng., Pavia Univ., Italy ; F. Maloberti

In this paper, we present a portable, battery-operated, three-dimensional magnetic microsystem (magneto-dosimeter), intended for monitoring the workers' exposure to magnetic fields in particular working environments, such as hospitals or physics laboratories. The proposed microsystem is based on a multichip module containing three equal channels for the three components of the magnetic field measurement, a microprocessor, and a memory. Each single-chip channel detects the magnetic field, converts it into the digital domain, and delivers the result to the microprocessor by means of an on-chip serial interface. The single-chip channel, fabricated in a 0.8-μm CMOS technology, is sensitive to magnetic fields ranging from -200 to +200 mT, achieving 12 bits of resolution, 11 bits of linearity, and an overall accuracy better than 1% in the temperature range from -20 to +80°C

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:49 ,  Issue: 2 )