TEMPERATURE COEFFICIENT MEASURING METHOD FOR HALL ELEMENT AND TEMPERATURE COMPENSATION METHOD FOR CURRENT DETECTOR

摘要

PURPOSE:To allow the determination of the temperature coefficient of unbalanced output voltage from a Hall element based on the measurements of unbalanced output voltage of the Hall element at one predetermined temperature and previous measurements. CONSTITUTION:The ambient temperature-unbalanced output voltage characteristics of a unit Hall element are previously measured for a plurality of Hall elements 1 having different temperature characteristics of unbalanced output voltage. Unbalanced output voltage at a predetermined temperature (e.g. room temperature) is them measured for a Hall element 1 to be used. The measurements are compared with prepared characteristics thus determining the temperature coefficient of unbalanced output voltage for the Hall element 1 to be used. Since the temperature coefficient can be determined by measuring the unbalanced output voltage at one arbitrary temperature, measurement can be made in a short time without requiring any thermostatic bath 2. The temperature coefficient can be determined using a graph of unbalanced output voltage and temperature by preparing the characterisatics at each temperature.