Micro-Tesla Offset in Thermally Stable AlGaN/GaN 2DEG Hall Plates Using Current Spinning

This article describes the characterization of a low-offset Hall plate using the AlGaN/GaN 2-D electron gas (2DEG). A four-phase current spinning technique was used to reduce the sensor offset voltage to values in the range of ~20 nV, which corresponds to a low residual offset of ~3.4 ± 2 μT when supplied with low voltages (0.25-1 V). These offsets are 30x smaller than the values previously report...