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Differential current detection

  • US 20050259371A1
  • Filed: 05/21/2004
  • Published: 11/24/2005
  • Est. Priority Date: 05/21/2004
  • Status: Active Grant
First Claim
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1. A detection circuit that detects a difference between a source current and a return current, the detection circuit comprising:

  • a constantly biased magnetic core through which conductors of the source and return currents extend;

    a sense winding around said core, said sense winding carrying an AC signal; and

    a sensing circuit connected with said sense winding that senses a change in small signal impedance of said sense winding relative to said core.

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