![]() ![]() The resistance of typical Hall devices varies from a few ohms to hundreds of ohms. Typical outputs are still just a few millivolts/kilogauss at rated /c- Although a larger IQ or a smaller d should increase V, these would cause excessive selfheating of the device (by increasing its resistance) and would change its characteristics as well as lower its sensitivity. The value of K is very small for most metals, but relatively large for certain n-type semiconductors, including germanium, silicon, and indium arsenide. VH is known as the Hall voltage and this is the Hall effect: VH = Kl^BId where: B = magnetic field (in gauss), d = thickness of strip, K = Hall coefficient. Data Acquisition Tecliniques Using PCs Second Editionĭata Acquisition Tecliniques Using PCs Second Edition Howard Austerlitz Parker Hannifin Corporation Parl^ ^Īngles to 1Q and B, as shown in Figure 2-5. ![]()
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