Abstract
Simple anisotropic magnetoresistance magnetometer with improved parameters was developed. New flipping circuits deliver optimized current pulse with 2.8 A amplitude. New type of signal processing uses switched integrator to avoid the most noisy time intervals. The achieved linearity is 0.2% in the ±200 μT range without feedback and 0.04% using integrated feedback coil. The magnetometer noise at 1 Hz is 2 nT/Hz 1/2, uncompensated temperature coefficient of sensitivity is −0.25%/K without the feedback and 0.01%/K with feedback. Temperature offset drift is typically 10 nT/K.
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