Magnetic field sensor arrangement and method for processing a magnetic field sensor output signal

A magnetic field sensor arrangement, comprising:

• a magnetic field sensor element configured to provide a sensor output signal responsive to a magnetic field, wherein the sensor output signal is representative of a magnetic field amplitude,
• a processing module configured to process the sensor output signal and to provide a processed sensor output signal which is representative of the sensor output signal,
• a switching level calculation module configured to determine a first switching level, during a power up mode, based on a default switching level, and determine, during a running mode, a second switching level based on the processed sensor output signal;
• a comparator module configured to receive the first switching level and the second switching level, compare the processed sensor output signal with the first switching level during the power up mode, compare the processed sensor output signal with the second switching level during the running mode, and to provide a comparator output signal based on each comparison;
• and
• a storage module configured to:
• store the default switching level;
• provide, during the power up mode, the default switching level to the switching level calculation module;
• update, during the running mode, the default switching level based on the second switching level currently calculated by the switching level calculation module, if a difference between the second switching level calculated during the running mode and the stored default switching level is greater than a predetermined percentage of the magnetic field amplitude;
• and
• maintain, during the running mode, the default switching level as unchanged if the difference between the switching level calculated during the running mode and the stored default switching level is equal to or less than the predetermined percentage of the magnetic field amplitude.