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

mt7344

Three-axis teslameter with integrated Hall probe free from the planar Hall effect
4 W4 W- j" P2 D5 Y" [Abstract – The first commercially available teslameter with a
" n( N7 o. D) f6 i& k. hfully integrated 3-axis Hall probe is described. The Hall probe
chip contains horizontal and vertical Hall elements, analogue
electronics, and a synchronisation circuit. A horizontal Hall
element measures the perpendicular component, and two vertical
: n' `1 k( t5 T% P4 KHall devices measure the two in-plane components of a magnetic
field. Current spinning in the Hall devices cancels offset, 1/f
( M/ x" K3 U5 [# d8 `8 [5 _noise, and the planar Hall voltage. The analogue electronic
7 k% t( U" Q& O* Pmodule of the teslameter cancels the residual offset and
! l, Q% b2 _1 P( o; ucompensates temperature dependence and non-linearity of the
' u/ b5 {$ b! N% d  m( uHall voltages. The digital module provides A/D conversion and
communication to a computer.


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5 k9 |" V2 O9 c" m5 W: d[ 本帖最後由 mt7344 於 2007-6-9 06:55 PM 編輯 ]