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Combined magnetic field gradient and magnetic field strength sensor

  • US 20070096729A1
  • Filed: 12/16/2004
  • Published: 05/03/2007
  • Est. Priority Date: 12/24/2003
  • Status: Active Grant
First Claim
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1. A magnetic field sensor device comprising an oscillatory member and a current controller, wherein the current controller is arranged to pass an alternating current (AC) along at least first and second current paths provided through the oscillatory member, characterised in that the current controller is arranged to provide magnetic gradiometer mode operation in which current flow through the first current path is in substantially the opposite direction to current flow through the second current path.

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