Inductively coupled ballast circuit

  • US 20050093475A1
  • Filed: 10/22/2004
  • Published: 05/05/2005
  • Est. Priority Date: 06/21/1999
  • Status: Active Grant
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First Claim
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1. A ballast circuit, comprising:

  • a control circuit;

    an oscillator electrically connected with said control circuit, wherein said oscillator is activated in response to predetermined electric signals from said control circuit;

    a driver electrically connected with said oscillator, wherein the output from said oscillator controls said driver;

    a half-bridge switching circuit electrically connected with said driver, wherein the output of said driver controls said half-bridge switching circuit;

    a series resonant tank circuit electrically connected with said half-bridge switching circuit, wherein said series resonant tank circuit includes an inductive coupler;

    a secondary coil inductively coupled with said series resonant tank circuit, wherein said series resonant tank circuit inductively energizes said secondary coil; and

    a load electrically connected to said secondary coil, whereby power is provided to said load by said secondary coil.

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