Method and system for determining the orientation of...

Electricity: measuring and testing – Magnetic – Magnetometers

Reexamination Certificate

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C324S207210, C324S225000, C702S150000

Reexamination Certificate

active

06882146

ABSTRACT:
The invention relates to a method and a system for determining the orientation of an external magnetic field by means of giant magneto-resistor (GMR) sensors. A sensor circuit is provided with two or more sub-circuits each having two GMR sensors connected in series. Three respective sensor voltages are obtained and a scaling factor is determined from differences in these voltages. An external magnetic field orientation is determined based on a scaling factor applied to the difference voltages. The inventive method enables signals from the GRM sensors to be reprocessed easily in order to compensate the temperature dependence of the signals.

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patent: 196 13 402 (1997-10-01), None
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patent: 0 807 827 (1997-11-01), None

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