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Unformatted text preview: electrons from a metal]. 5. A Hall sw itch uses an extrinsic, p-type semiconductor doped w ith 10 acceptors per cm . 14 3 p The hole mobility : of the semiconductor is 500 cm /V-sec. The sample is 1 cm x 1 cm 2 square and 1 : m thick. H (a) Is the Hall voltage V (as defined in fig.) positive or negative? H H z (b) For the given sample, calculate the Hall sensitivity S = V /B . (c) What is the advantage of low ering the semiconductor dopant concentration in a Hall device? What happens if the semiconductor is intrinsic? Assume equal hole and electron mobilities....
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This note was uploaded on 10/16/2010 for the course E SC 314 at Pennsylvania State University, University Park.