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BPN599: MEMS Electronic Compass: Three-Axis Magnetometer

Project ID BPN599
Website
Start Date Tue 2011-Feb-01 11:02:04
Last Updated Mon 2014-Aug-11 20:56:46
Abstract The goal of this is project is to develop a low-power three axis MEMS magnetic sensor suitable for use as an electronic compass in smart phones and portable electronics. Our objective is to achieve a resolution of 200 nT/rt Hz and power consumption of 5 mW/axis with DC power supply of 3.3V. To enable co-integration with a 3-axis accelerometer, we seek to optimize sensor performance without the need for a vacuum seal. Although past devices designed by our group have demonstrated that our resolution goal is reachable, these devices suffered from dc offset larger than Earth's field and required an external programmable oscillator for operation. Here, we aim to reduce offset by two orders of magnitude and develop self-oscillation loops to excite the sensor at its natural frequency.
Status Continuing
Funding Source Federal
IAB Research Area Physical Sensors & Devices
Researcher(s) Vashwar T. Rouf, Mo Li, Soner Sonmezoglu
Advisor(s) David A. Horsley
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