Inductively coupled ballast circuit

  • US 6,825,620 B2
  • Filed: 09/18/2002
  • Issued: 11/30/2004
  • Est. Priority Date: 06/21/1999
  • Status: Active Grant
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First Claim
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1. A ballast circuit comprising:

  • an electromagnetic radiation emitting assembly comprising a secondary coil; and

    an electronic assembly comprising an inductive coupler, said inductive coupler separated from said electromagnetic radiation emitting assembly by an air gap, aid inductive coupler operable to induce a voltage in said secondary coil when said electronic assembly is energized, wherein a permeance of said air gap is adjustable as a function of a distance between said inductive coupler and said secondary coil, an operating point of said electromagnetic radiation emitting assembly adjustable as a function of said permeance.

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