Suppressing interference in AC measurements of cells, batteries and other electrical elements

  • US 6,417,669 B1
  • Filed: 06/11/2001
  • Issued: 07/09/2002
  • Est. Priority Date: 06/11/2001
  • Status: Active Grant
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First Claim
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1. A method for evaluating a component of a signal at a measurement frequency while suppressing potential components at one or more interference frequencies comprising:

  • sampling said signal M times per period of said measurement frequency for N said periods, said number N being an integral multiple of said measurement frequency divided by the greatest common factor of said measurement frequency and said interference frequencies;

    summing each of said M signal samples per period over said N periods to obtain M sample sums;

    evaluating said component of said signal at said measurement frequency from said M sample sums.

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