A Highly Sensitive CMOS Digital Hall Sensor for Low Magnetic Field Applications
AbstractIntegrated CMOS Hall sensors have been widely used to measure magnetic fields. However, they are difficult to work with in a low magnetic field environment due to their low sensitivity and large offset. This paper describes a highly sensitive digital Hall sensor fabricated in 0.18 μm high voltage CMOS technology for low field applications. The sensor consists of a switched cross-shaped Hall plate and a novel signal conditioner. It effectively eliminates offset and low frequency 1/f noise by applying a dynamic quadrature offset cancellation technique. The measured results show the optimal Hall plate achieves a high current related sensitivity of about 310 V/AT. The whole sensor has a remarkable ability to measure a minimum ±2 mT magnetic field and output a digital Hall signal in a wide temperature range from −40 °C to 120 °C. View Full-Text
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Xu, Y.; Pan, H.-B.; He, S.-Z.; Li, L. A Highly Sensitive CMOS Digital Hall Sensor for Low Magnetic Field Applications. Sensors 2012, 12, 2162-2174.
Xu Y, Pan H-B, He S-Z, Li L. A Highly Sensitive CMOS Digital Hall Sensor for Low Magnetic Field Applications. Sensors. 2012; 12(2):2162-2174.Chicago/Turabian Style
Xu, Yue; Pan, Hong-Bin; He, Shu-Zhuan; Li, Li. 2012. "A Highly Sensitive CMOS Digital Hall Sensor for Low Magnetic Field Applications." Sensors 12, no. 2: 2162-2174.