H - Electricity – 03 – H
Patent
H - Electricity
03
H
H03H 11/26 (2006.01) G01R 25/00 (2006.01) H03H 21/00 (2006.01)
Patent
CA 2048760
Apparatus for measuring or compensating for phase or time delay between a reference signal and a desired signal produces an approximate error signal by differentially summing the desired and reference signals. The approximate error signal is then used, in a feedback loop, to control application of an adaptive delay to each of the reference and desired signals. The total lead or lag difference is represented by the difference between the two delays applied to the reference and desired signals, respectively. The phase or time delay measurement or compensation arrangements may be applied to linear variable differential transformers, synchronous AM detectors, zero crossing detectors and phase locked loops. Variations on this basic technique can yield substantially exact measurement or compensation. The invention is applicable to sampling arrangements including oversampling/decimation or interpolation/decimation to increase compensation accuracy to any desired degree.
Welles Kenneth Brakeley II
Yassa Fathy Fouad
Company General Electric
Craig Wilson And Company
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