G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 33/07 (2006.01)
Patent
CA 2384583
A Hall sensor array for offset-compensated magnetic field measurement comprises a first (1A, 1B) and at least one addi-tional pair (2A, 2B; 2A, 2B, 3A, 3B) of Hall sensor elements. Each Hall sensor element (1A, 1B, 2A, 2B; 1A, 1B, 2A, 2B, 3A, 3B) has four terminals (K1, K2, K3, K4), of which a first and a third terminal (K1, K3) act as power supply terminals for supplying an operating current (I operation) and a second and a fourth terminal (K2, K4) act as measurement terminals for measuring a Hall voltage (U Hall). The Hall sensor elements (1A, 1B, 2A, 2B; 1A, 1B, 2A, 2B, 3A, 3B) are so arranged that the current directions of the operating current (I operation) in the two Hall sensor elements of each pair are offset at an angle of approximately 90° to one another. The Hall sensor elements (2A, 2B; 2A, 2B, 3A, 3B) of the additional pair(s) are so arranged that their operating current directions are offset at an angle of approximately 90°/n to the operating current directions of the first pair (1A, 1B) of Hall sensor elements, n being the total number of Hall sensor element pairs and n >= 2. The first terminals (K1), the third termi-nals (K3), the second terminals (K2) and the fourth terminals (K4) of the Hall sensor elements (1A, 1B, 2A, 2B; 1A, 1B, 2A, 2B, 3A, 3B) are respectively connected to each other electri-cally. The operating current (I operation) can thus be supplied over the first and third terminals (K1, K3) of all the Hall sensor elements and the Hall voltage (U Hall) can be measured over the second and fourth terminals (K2, K4) of all the Hall sensor elements (1A, 1B, 2A, 2B; 1A, 1B, 2A, 2B, 3A, 3B).
L'invention concerne un dispositif de capteurs de Hall pour la mesure du champ magnétique avec compensation de l'offset, comprenant une première paire (1A, 1B) et au moins une autre paire (2A, 2B; 2A, 2B, 3A, 3B) de capteurs de Hall, chaque capteur de Hall (1A, 1B, 2A, 2B; 1A, 1B, 2A, 2B, 3A, 3B) présentant quatre raccordements (K1, K2, K3, K4), dont le premier et le troisième raccordement (K1, K3) servent de raccordement d'alimentation d'un courant de fonctionnement (Ifonctionnement), et le deuxième et le quatrième raccordement (K2, K4) servent de raccordement de mesure d'une tension de Hall (UHall). Les capteurs de Hall (1A, 1B, 2A, 2B; 1A, 1B, 2A, 2B, 3A, 3B) sont disposés de manière que les sens du courant de fonctionnement (Ifonctionnement) sont décalés d'environ 90 DEG l'un par rapport à l'autre dans les capteurs de Hall de chaque paire, les capteurs de Hall (2A, 2B; 2A, 2B, 3A, 3B) de l'autre ou des autres paires étant disposés de manière que leurs sens du courant de fonctionnement soient décalés d'environ 90 DEG /n par rapport aux sens du courant de fonctionnement de la première paire (1A, 1B) de capteurs de Hall, n étant la somme des paires de capteurs de Hall et n >/= 2.
Hohe Hans-Peter
Sauerer Josef
Weber Norbert
Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung
Mccarthy Tetrault Llp
LandOfFree
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