Patent ID: 8872530

Claim:
A method for correcting measurement of a voltage across a first output terminal and a second output terminal of a sensor, the sensor including a generator and a series resistance, and the first output terminal and the second output terminal being connected to a pull-up resistor and a pull-down resistor, respectively, the method comprising: when the generator generates a predetermined voltage, performing a preliminary operation to evaluate the series resistance of the sensor, the preliminary operation including: measuring a first voltage across the first output terminal and the second output terminal when a first bias voltage is applied to the pull-up resistor and to the pull-down resistor; measuring a second voltage across the first output terminal and the second output terminal when a second bias voltage different from the first bias voltage is applied to the pull-up resistor and to the pull-down resistor; and evaluating the series resistance based on the first voltage and the second voltage; and correcting, based on the evaluated series resistance, a third voltage measured across the first output terminal and the second output terminal of the sensor to correspond to the predetermined voltage generated by the generator.