Title :
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
fDate :
2/1/1999 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
