Title :
Static error in the temperature constant measurement configurations due to DC amplifier offset voltage
Author :
Freire, Raimundo C S ; Santos, Francisco F. ; Alves, Raimundo N C ; Barros, Alessio T. ; Luciano, Benedito A.
Author_Institution :
Univ. Fed. da Campina Grande, Brazil
Abstract :
The DC amplifier offset voltage introduces dynamic and static errors in measurements based on heated sensors at constant temperature configuration. It is shown, in the case of a radiometer, the variation of static errors in function of offset voltage for configurations of feedback based on analogic voltage control and on pulse width modulation - PWM. These errors increase with offset voltage and are similar in PWM configuration, decreasing with pulse amplitude.
Keywords :
DC amplifiers; measurement errors; pulse width modulation; radiometers; temperature measurement; DC amplifier offset voltage; PWM configuration; analogic voltage control; heated sensors; pulse amplitude; pulse width modulation; radiometer; static error; temperature constant measurement; Error correction; Feedback; Pulse amplifiers; Pulse width modulation; Radiometry; Space vector pulse width modulation; Temperature measurement; Temperature sensors; Thermal sensors; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2003. IMTC '03. Proceedings of the 20th IEEE
Print_ISBN :
0-7803-7705-2
DOI :
10.1109/IMTC.2003.1208021
