Error in the thermoresistive sensor-based feedback measurement configuration due to DC amplifier offset voltage

Feedback circuits with thermoresistive sensors have been widely used in the measurement of thermal radiation and fluid flow. In general, the operation of these circuits is explained, assuming an ideal operational amplifier used in the feedback configuration. The effect of the operational amplifier offset voltage on the static performance has been analyzed. The error introduced when used as a measuring instrument, due to input offset voltage, is estimated.