integrated Hall probe free from the planar Hall effect[EPFL]

mt7344

Three-axis teslameter with integrated Hall probe free from the planar Hall effect
Abstract – The first commercially available teslameter with a
1 Z  s% N- ~, [7 V4 @! Gfully integrated 3-axis Hall probe is described. The Hall probe
chip contains horizontal and vertical Hall elements, analogue
' x" [- k( k6 b! c/ N6 helectronics, and a synchronisation circuit. A horizontal Hall
element measures the perpendicular component, and two vertical
Hall devices measure the two in-plane components of a magnetic
" J: T( r, X/ J) @, P1 ]field. Current spinning in the Hall devices cancels offset, 1/f
noise, and the planar Hall voltage. The analogue electronic
. [( U# [3 Z( o% Bmodule of the teslameter cancels the residual offset and
compensates temperature dependence and non-linearity of the
Hall voltages. The digital module provides A/D conversion and
communication to a computer.


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[ 本帖最後由 mt7344 於 2007-6-9 06:55 PM 編輯 ]