Im sure this has been done before, right?
Two NTC thermistors.
10k @ 25C Beta = 3380I'd like a circuit which outputs a voltage which is the difference in temperature between the two resistors.
But it needs to be linear.
I.e.
1 degree difference = 0.1V 10 degree difference = 1V 100 degree difference = 10VAt ANY location in the thermistors operating range.
Im trying to get my head around this....what is the mathematical function for what Im trying to do? Since the thermistor is non-linear?
Im thinking a circuit which linearizes each thermistors resistance vs. temperature, and then another which simply does a voltage difference.
Sound right?
I can do the voltage difference, but how do I do the linearizer?