Patent ID: 6975951
Filing Date: 2005-12-13
Classification: G01R

Abstract:
1. A method of compensating for phase differences between sampled values of first and second alternating current waveforms, said method comprising: employing a phase angle compensation factor; sequentially sampling a plurality of values of each of said first and second alternating current waveforms; and adjusting the sampled values of said second alternating current waveform to correspond with the sampled values of said first alternating current waveform by employing, for a corresponding one of said sampled values of said second alternating current waveform, a preceding sampled value of said second alternating current waveform plus the product of: (i) said phase angle compensation factor and (ii) the difference between said corresponding one of said sampled values and said preceding sampled value, when said phase angle compensation factor is positive, or alternatively adjusting the sampled values of said second alternating current waveform to correspond with the sampled values of said first alternating current waveform by employing, for said corresponding one of said sampled values, said preceding sampled value minus the product of: (i) the sum of one plus said phase angle compensation factor and (ii) the difference between said preceding sampled value and the sampled value of said second alternating current waveform preceding said preceding sampled value, when said phase angle compensation factor is negative.