Electricity: measuring and testing – Magnetic – Magnetometers
Reexamination Certificate
2005-04-19
2005-04-19
Patidar, Jay (Department: 2862)
Electricity: measuring and testing
Magnetic
Magnetometers
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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Infineon - Technologies AG
Patidar Jay
Schiff & Hardin LLP
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