resistor in parallel with a thermistor

[Pic_User]

http://www.picbasic.co.uk/forum/showthread.php?p=34372&highlight=simple+Thermistor+linearization#post3437 2


Hi, Mark

I Read somewhere a ( very ... ) simple Thermistor linearization was to parallel the Thermistor a resistor of the same nominal value ...

I didn't try, but Worth the test ... no ???

Alain

Hi Alain,
I have never tried this idea, but found this.

Microchip Technology Inc.
Application note AN685
Thermistors in Single Supply Temperature Sensing Circuits

Re: first level linearization of the thermistor output
... to implement linearization with the analog hardware

Placing a regular resistor in parallel (or series) with a thermistor

Series:
... the thermistor is placed in series with a standard 1% resistor
... the series thermistor system responds to temperature in a linear manner over a limited temperature range.
The linearization resistor’s value should be equal to magnitude of the thermistor at the mid-point of the temperature range of interest.

Parallel:
... typically used in system feedback loops
Once again, the optimum linearity response of this resistive network is obtained at the point where the thermistor resistance and [the parallel resistor] are equal.

http://ww1.microchip.com/downloads/en/AppNotes/00685b.pdf

Any thoughts on this from anyone?
-Adam-