A Non-Invasive Thermal Drift Compensation Technique Applied to a Spin-Valve Magnetoresistive Current Sensor
AbstractA compensation method for the sensitivity drift of a magnetoresistive (MR) Wheatstone bridge current sensor is proposed. The technique was carried out by placing a ruthenium temperature sensor and the MR sensor to be compensated inside a generalized impedance converter circuit (GIC). No internal modification of the sensor bridge arms is required so that the circuit is capable of compensating practical industrial sensors. The method is based on the temperature modulation of the current supplied to the bridge, which improves previous solutions based on constant current compensation. Experimental results are shown using a microfabricated spin-valve MR current sensor. The temperature compensation has been solved in the interval from 0 °C to 70 °C measuring currents from −10 A to +10 A. View Full-Text
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Sánchez Moreno, J.; Ramírez Muñoz, D.; Cardoso, S.; Casans Berga, S.; Navarro Antón, A.E.; Peixeiro de Freitas, P.J. A Non-Invasive Thermal Drift Compensation Technique Applied to a Spin-Valve Magnetoresistive Current Sensor. Sensors 2011, 11, 2447-2458.
Sánchez Moreno J, Ramírez Muñoz D, Cardoso S, Casans Berga S, Navarro Antón AE, Peixeiro de Freitas PJ. A Non-Invasive Thermal Drift Compensation Technique Applied to a Spin-Valve Magnetoresistive Current Sensor. Sensors. 2011; 11(3):2447-2458.Chicago/Turabian Style
Sánchez Moreno, Jaime; Ramírez Muñoz, Diego; Cardoso, Susana; Casans Berga, Silvia; Navarro Antón, Asunción Edith; Peixeiro de Freitas, Paulo Jorge. 2011. "A Non-Invasive Thermal Drift Compensation Technique Applied to a Spin-Valve Magnetoresistive Current Sensor." Sensors 11, no. 3: 2447-2458.