Spinning Current Technique for Graphene-Based Hall Sensors

Spinning Current Technique (SCT) is a pioneering solution to counter the inherent offset voltage challenge in Hall plates, crucial devices for magnetic field detection. SCT dynamically eliminates the offset, enabling precise measurement of magnetic field magnitudes. Successfully applied to a symmetrical Hall device, SCT involves the controlled rotation of terminals to preserve the induced Hall voltage polarity while reversing the offset voltage polarity, offering a groundbreaking resolution. Leveraging the distinctive properties of Hall plates, the study introduces a specifically designed SCT circuit for a chosen Hall plate, demonstrating remarkable accuracy in simulations. The paper proposes advancing the SCT for Graphene-based Hall sensors, capitalizing on Graphene's superior characteristics for heightened sensitivity, linearity, and temperature stability. The primary objective is the integration of SCT into Graphene Hall Sensors, potentially resulting in cost-effective, highly sensitive magnetic sensors. The adaptability of Hall plates allows for testing on various plates to evaluate performance. The paper underscores critical parameters such as Hall voltage, offset voltage, power supply ratings, and temperature considerations. While existing products target similar goals, the uniqueness of this study lies in unexplored terrain—implementing SCT on Graphene Hall plates. The intended users are manufacturers of commercial Hall sensors, applicable in diverse fields such as current measurement, magnetometry, positional sensing, motion tracking, and geomagnetic field measurement.