A system for calibrating an electronic compass for a vehicle of the type employing a Forward and Lateral magnetoresistive magnetic field sensor. As the vehicle changes headings, the system periodically samples and digitally stores the peaks of the sensor outputs. When the stored peaks indicate a minimum...http://www.google.de/patents/US6356851?utm_source=gb-gplus-sharePatent US6356851 - Accelerated calibration for electronic compass module
