Title :
Effect of operational amplifier parameters on the performance of feedback structures with thermoresistive sensors
Author :
Freire, Raimundo C S ; Deep, Gurdip S. ; Oliveira, Amauri
Author_Institution :
UFPB-CCT-DEE, Campina Grande, Brazil
Abstract :
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
Keywords :
anemometers; bridge circuits; circuit stability; dynamic response; electric sensing devices; equivalent circuits; feedback amplifiers; flowmeters; measurement errors; operational amplifiers; temperature sensors; bridge configuration; common mode; differential gain; dynamic performance; dynamic response; error estimation; feedback circuits; feedback structures; ideal operational amplifier; input offset voltage; limiting parameters; operational amplifier parameters effect; static performance; thermal flow sensor; thermoresistive sensors; Feedback circuits; Fluid flow; Fluid flow measurement; Operational amplifiers; Power measurement; Sensor phenomena and characterization; Temperature sensors; Thermal sensors; Thermoresistivity; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.610254
