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Method for digitally measuring electrical impedance

  • US 20040176918A1
  • Filed: 05/27/2003
  • Published: 09/09/2004
  • Est. Priority Date: 10/22/1999
  • Status: Active Grant
First Claim
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1. - A device for digitally measuring electrical impedance, comprising in combination:

  • a network including a first electrical component and a second electrical component serially connected;

    a signal generating means operatively coupled to said network for driving a current through said serially connected components;

    means for sampling a first voltage impressed across said network and a second voltage impressed across said second component into digitized voltages;

    means for convolving each said digitized voltage with a digital waveform for forming a first complex number and a second complex number correlative to said first voltage impressed across said network and said second voltage impressed across said second component respectively;

    means for determining a ratio of said second complex number to a difference between said first and said second complex number, and means for calculating an electrical impedance of said second component by multiplying said ratio by a value of said first component wherein said electrical impedance of said second component is digitally measured.

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