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

Volume

2

fYear

1997

fDate

19-21 May 1997

Firstpage

898

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE

Conference_Location

Ottawa, Ont.

ISSN

1091-5281

Print_ISBN

0-7803-3747-6

Type

conf

DOI

10.1109/IMTC.1997.610254

Filename

610254