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Moving-Magnet Electromagnetic Device with Planar Coil

  • US 20120294474A1
  • Filed: 05/19/2011
  • Published: 11/22/2012
  • Est. Priority Date: 05/19/2011
  • Status: Active Grant
First Claim
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1. An electromagnetic device comprising:

  • a housing;

    a planar coil disposed inside the housing; and

    a magnetic diaphragm disposed inside the housing,wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm,wherein the planar coil is separated from the magnetic diaphragm,wherein the magnetic diaphragm is moveable in the presence of an exterior pressure.

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