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

Author

Freire, Raimundo Carlos Silvério ; Deep, Gurdip Singh

Author_Institution

Dept. of Electr. Eng., Univ. Fed. da Paraiba, Joao Pessoa, Brazil

Volume

48

Issue

1

fYear

1999

fDate

2/1/1999 12:00:00 AM

Firstpage

50

Lastpage

54

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 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

Keywords

DC amplifiers; anemometers; circuit feedback; electric sensing devices; flow measurement; measurement errors; operational amplifiers; radiometry; thermoelectric devices; DC amplifier offset voltage; anemometers; error estimation; feedback configuration; feedback measurement; fluid flow; measurement of thermal radiation; operational amplifier; operational amplifier offset voltage; radiation detector; static performance; thermoresistive sensors; Bandwidth; Feedback circuits; Fluid flow; Fluid flow measurement; Operational amplifiers; Sensor phenomena and characterization; Temperature sensors; Thermal sensors; Thermoresistivity; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.755059

Filename

755059