Hello,
Thank you all for you answers, I can now begin to work well on that thermistor. Docedison, it seems that I don't have all the electronic skills needed for the understanding of you answer, have you got a schematic? I really would like to understand, would you not use a wheatstone bridge at all?
What is the goal of the current source? What is the "calibration" that you told me?
I'm just in first year of electronic engineer school.