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Temperature Coefficient of Resistance for Current Sensing

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  • Author: Bryan Yarborough
Resistance is a result of a combination of factors that cause an electron’s movement to deviate from an ideal path within a crystalline lattice of a metal or metal alloy. As an electron encounters defects or imperfections within the lattice it can cause diffusion. This increases the path traveled, resulting in an increased resistance. These defects and imperfections can result from: • Movement in the lattice due to thermal energy • Different atoms present in the lattice, such as impurities • Partial or complete absence of a lattice (amorphous structure) • Disordered zones at the grain boundaries • Crystalline and interstitial defects in the lattice
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