| US 7,414,399 B2 | ||
| Micromagnetometer of the fluxgate type with improved excitation coil | ||
| Elisabeth Delevoye, Grenoble (France); and Christian Jeandey, Saint-Egreve (France) | ||
| Assigned to Commissariat a l'Energie Atomique, Paris (France) | ||
| Filed on Apr. 30, 2007, as Appl. No. 11/741,951. | ||
| Claims priority of application No. 06 51615 (FR), filed on May 04, 2006. | ||
| Prior Publication US 2007/0257669 A1, Nov. 08, 2007 | ||
| Int. Cl. G01R 33/04 (2006.01); G01R 33/02 (2006.01) | ||
| U.S. Cl. 324—253 [324/249] | 29 Claims |
| 1. Micromagnetometer of the fluxgate type made of thin layers, including:
a support having a main plane,
a magnetic circuit fitted with at least one first magnetic core of a main direction and at least one second magnetic core
parallel to the first core,
at least one excitation coil including a succession of conductive elements connected in series, and
means for applying an excitation signal to said series of conductive elements,
wherein the excitation coil includes, flat conductive zones parallel to each other extending in a direction that forms a non-zero
angle with said main direction and located respectively in a plane parallel to the main plane of the support, a first plurality
of flat conductive zones being located opposite the first core, a second plurality of flat conductive zones being located
opposite the second core, at least some conductive elements of the excitation coil including,
at least one first flat conductive zone belonging to said second plurality of conductive zones connected to a second flat
conductive zone belonging to said first plurality of flat conductive zones and located in the same plane orthogonal to the
main plane of the support as said second flat conductive zone, the conductive elements of the excitation coil including
a conductive part forming a closed contour surrounding the first and second cores, and including said first flat conductive
zone and said second flat conductive zone.
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