Integrated sensor array with offset reduction

摘要

A method and system provides increased accuracy in a CMOS sensor array by correcting sensor offsets. An assembly of switches connects the power source and the read-out circuit to each terminal of the sensors, allowing to determine the offset from different measurement directions and polarities. The accuracy can be enhanced by replacing individual offsets by values from a polynomial fit to the entire sensor array. The sensors are preferably Hall sensors, but also diode or strain sensors can be used.