GMR high current, wide dynamic range sensor

摘要

A configuration where a wide range of current can be sensed accurately in spite of using a magnetic material with non-linearities and limited hysteresis. This configuration includes: a strip line current carrier, an IC chip containing a GMR sensor element, an integrated drive coil, like an isoloop. Field produced by current in the strip line is detected by the sensor. Feedback field is produced by current in an on-chip coil to counteract spurious fields from the strip line.