Patent ID: 6703843
Filing Date: 2004-03-09
Classification: G01B,G01D,G01N

Abstract:
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.