Allegro Microsystems, LLC

Nicolás Rigoni

Emanuele Andrea Casu

Sergio Nicolás Deligiannis

Cristian Trinidad

A magnetic field sensor configured to sense a parameter associated with a rotatable target that affects a magnetic field includes at least one magnetic field sensing element that is arranged to generate a signal that is indicative of the magnetic field, a magnitude calculator responsive to the signal and configured to generate a magnitude signal indicative of a magnitude of the magnetic field, and a harmonic compensator responsive to the magnitude signal and configured to generate an estimate of a harmonic error of the signal and apply the estimate of the harmonic error of the signal to the signal to generate a corrected signal.

Harmonic compensation with magnitude feedback for magnetic field sensors

According to some embodiments, a method implemented in electronic circuitry includes: receiving a first signal having a sinusoidal waveform; receiving a second signal having a sinusoidal waveform; generating a composite signal responsive to the first and second signals; determining an orthogonality adjustment coefficient based on a duty cycle of the composite signal; and applying the orthogonality adjustment coefficient to generate an adjusted second signal that is substantially orthogonal to the first signal.

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Buenos Aires, Argentina

Nicolás Rigoni