Patent ID: 8125221
Filing Date: 2012-02-28
Classification: G01R

Abstract:
1. A device for measuring an angle at which a magnetic field is aligned in a plane relative to a reference axis with at least two magnetic field sensors, which are aligned with their measurement axes in and/or parallel to the plane and oriented at right angles to each other, wherein the device has a PLL phase control circuit with a follow-on oscillator arranged in a phase control loop, further characterized in that the follow-on oscillator has at least one oscillator output for a digital oscillating signal, further characterized in that the magnetic field sensors are coupled to the phase control loop in such a way that the digital oscillating signal is phase synchronous with a rotation scanning signal formed by rotary scanning of the measurement signals of the magnetic field sensors, and still further characterized in that the oscillator output is connected to a phasing detector for determining the phasing of the digital oscillating signal.