Ultra Low-Power Angular Position Sensor for High-Speed Portable Applications

We present a technique for contactless angular position sensing that allows low power consumption while keeping dynamic properties comparable to existing sensors. The technique essentially consists in combining a recently developed sensing element, the so-called Circular Vertical Hall Device, with a simple and robust signal treatment based on phase detection. Because of its low startup time, this circuit is specially suited for pulsed mode operation, which enables to further decrease the power consumption. More generally, the absence of complex digital signal treatment makes this technique a natural method for measuring the magnetic field direction and therefore for designing an angular position sensor using Hall probes.

Published in:
2009 Ieee Sensors, Vols 1-3, 173-176
Presented at:
8th IEEE Conference on Sensors, Christchurch, NEW ZEALAND, Oct 25-28, 2009
IEEE Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa

Note: The status of this file is: EPFL only

 Record created 2010-11-30, last modified 2018-03-17

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