標題: integrated Hall probe free from the planar Hall effect[EPFL] [打印本頁] 作者: mt7344 時間: 2007-6-9 06:54 PM 標題: integrated Hall probe free from the planar Hall effect[EPFL] Three-axis teslameter with integrated Hall probe free from the planar Hall effect9 }* r, R) L( @" F( U7 ]# ?
Abstract – The first commercially available teslameter with a: Y/ r0 ?" L# M* Z4 L" e
fully integrated 3-axis Hall probe is described. The Hall probe" }' b J; @4 ?
chip contains horizontal and vertical Hall elements, analogue) t; L( T* z) P4 |9 k1 x
electronics, and a synchronisation circuit. A horizontal Hall* B3 T& f( B3 d1 G0 s2 K; J; S+ G& p& L
element measures the perpendicular component, and two vertical W8 I; A3 P5 l: I& rHall devices measure the two in-plane components of a magnetic 4 n( w- F& K* Q6 q' Xfield. Current spinning in the Hall devices cancels offset, 1/f$ G: `, x- A1 i* j6 W
noise, and the planar Hall voltage. The analogue electronic4 i4 M& M$ `7 n8 Q; d1 A
module of the teslameter cancels the residual offset and 1 q1 }! L0 S7 a0 a6 T* F& d Ecompensates temperature dependence and non-linearity of the . n B( }/ d- R ~: j4 kHall voltages. The digital module provides A/D conversion and8 {! A+ Y( y) a- v* z
communication to a computer.1 C6 @/ i4 F; R9 Q