2003 · 20 citations · 0 references
EngineeringElectrical EngineeringInstrumentationMicroelectronicsSensorsElectrical SensorsLow-noise Circuit DesignMagnetic SensorsMixed-signal Integrated Circuit DesignMixed-signal IntegrationSensor IntegrationIntegrated Magnetic SensorsMagnetic Field SensingMagnetic Field SensorsMagnetic Sensor CalibrationRobust DesignSensor Array CalibrationSensor ArraysSignal-to-noise Ratio Optimization
An array of integrated Hall elements is presented to maximize signal to noise ratio and to minimize the offset. Novel magnetic sensor bias circuits and signal amplification circuit suitable for sensor arrays are shown. The positioning of sensor array elements on the ASIC, to precisely determine the spatial distribution of the magnetic field for various physical quantity measurement applications, is discussed. On board sensor calibration together with controlled temperature behavior to compensate for the non-ideal temperature behavior of the applied magnetic field is demonstrated to allow for a robust design suitable for volume ASIC production.