DocumentCode :
3606282
Title :
Self-calibrating closed-loop circuit for configurable constant voltage thermal anemometers
Author :
Gorreta, S. ; Barajas, E. ; Kowalski, L. ; Atienza, M.T. ; Dominguez-Pumar, M. ; Jimenez, V.
Author_Institution :
Univ. Politec. de Catalunya, Barcelona, Spain
Volume :
51
Issue :
19
fYear :
2015
Firstpage :
1499
Lastpage :
1501
Abstract :
A new circuit is described which applies a configurable voltage across an RTD while the current flowing through it is measured with a current mirror. The circuit also allows working with voltages above the IC supply voltage to cope with the high power RTD dissipation normally required in thermal anemometers. The circuit is periodically calibrated to cancel the errors and amplifier offset and therefore improves measurement accuracy. Experimental measurements of the circuit fabricated using 0.35 μm AMS technology show the functionality and improved power efficiency.
Keywords :
CMOS integrated circuits; anemometers; calibration; current mirrors; resistance thermometers; AMS technology; CMOS C35B4C3 process; IC supply voltage; RTD dissipation; amplifier offset; complementary metal oxide semiconductor; configurable constant voltage; current mirror; error cancellation; integrated circuit; resistance temperature detector; self-calibrating closed-loop circuit; size 0.35 mum; thermal anemometer;
fLanguage :
English
Journal_Title :
Electronics Letters
Publisher :
iet
ISSN :
0013-5194
Type :
jour
DOI :
10.1049/el.2015.1947
Filename :
7272255
Link To Document :
بازگشت