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voltage propotion to temperature?

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melodyseu

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Help!

How to generate a voltage propotion to temperature except using bandgap in a easy way?
 

non inverting opamp with feedback resistor as Rtd and one more resostor for getting the gain say R2.

now my o/p = (Rtd/R2+1)Vin . keep Vin=1v. so op is prop to Rtd which is prop to temp.

u can use the inverting stage too
 

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