Negative Temperature Coefficient Thermistors for Temperature ...
Negative Temperature Coefficient Thermistors for Temperature ...
Negative Temperature Coefficient Thermistors for Temperature ...
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<strong>Thermistors</strong> 9<br />
T ° K<br />
340<br />
320<br />
300<br />
280<br />
260<br />
Truth model <strong>for</strong> <strong>Temperature</strong> vs Voltage<br />
0.2 0.4 0.6 0.8<br />
Normalized<br />
voltage<br />
Figure 6<br />
As the figure shows, the temperature voltage relationship is approximately linear with a possibly cubic nonlinearity. Fitting 500<br />
samples of this curve to a cubic polynomial by the least square method results in this equation<br />
T 227.929 251.624 v 358.996 v 2 267.536 v 3<br />
Fig.7 shows the error plot <strong>for</strong> equation (19) combined with Fig.4, the error plot <strong>for</strong> the simplified equation<br />
(19)
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