Effect of operational amplifier parameters on the performance of feedback structures with thermoresistive sensors

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 various limiting parameters of the operational amplifier on the static and dynamic performance has been analyzed. The error introduced when used as a measuring device, due to input offset voltage is estimated.