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High bandwidth current sensor and method therefor

  • US 9,817,036 B2
  • Filed: 11/06/2012
  • Issued: 11/14/2017
  • Est. Priority Date: 11/06/2012
  • Status: Active Grant
First Claim
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1. A current sensor comprising,a current carrying trace located within a first metal layer of the substrate;

  • anda first sensing trace located within a second metal layer of the substrate proximate to the current carrying trace;

    a second sensing trace located within a third metal layer of the substrate proximate to the current carrying trace, whereinthe first metal layer is between the second metal layer and the third metal layer,the first sensing trace is looped in the same direction as the first sensing trace, anda first end of the first sensing trace is connected to a first end of the second sensing trace with a via between the second and third metal layers of the substrate;

    a sensing circuit, coupled to a second end of the first sensing trace and a second end of the second sensing trace, the sensing circuit configured to detect an electromagnetic force (emf) generated by magnetic flux inductively coupled from the current carrying trace to the first and second sensing traces.

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