Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1995-10-04
1998-08-04
Karlsen, Ernest F.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324251, 324719, G01R 3126
Patent
active
057899312
ABSTRACT:
A method and apparatus for producing the conductivity-mobility spectrum of an isotropic semiconductor material, and hence infer the mobility and concentration of carriers in the material. Hall voltage and material conductivity are measured at a plurality of magnetic field strengths, values of the spectrum estimated for each field strength, and the estimates numerically iterated to produce convergent values for the spectrum. In one embodiment, interim selected values of the spectrum are prevented from going negative, which increases the precision of the ultimate convergent values. In another embodiment, the iteration equations employ damping factors to prevent over-correction from one iteration to the next, thus preventing convergent instabilities. The preferred iteration is the Gauss-Seidel recursion.
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Antoszewski Jaroslaw
Bartoli Filbert J.
Faraone Lorenzo
Hoffman Craig A.
Meyer Jerry R.
Karlsen Ernest F.
Kobert Russell M.
McDonnell Thomas E.
Miles Edward F.
The United States of America as represented by the Secretary of
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