Method and apparatus for error correction of phase measurement s

Details Method and apparatus for error correction of phase measurement s Method and apparatus for error correction of phase measurement s

1989-01-10

1989-12-26

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

G01R 2500

Patent

active

048900567

ABSTRACT:
Non-linearities in phase detector output signals are digitally corrected as a function not only of the measured phase difference signal itself but also of the input signal amplitude(s) to the phase detector so that a desired degree of precision can be efficiently and conveniently maintained over the entire dynamic measurement range. Pre-stored digitized compensated output signals (or correction coefficients) are selected from a digital memory as a function of both the distorted phase measurement signal itself and the amplitude(s) of the signals being compared.

REFERENCES:
patent: 3953794 (1976-04-01), Moore
patent: 4178631 (1979-12-01), Nelson, Jr.
patent: 4506333 (1985-03-01), Porrot et al.
patent: 4654586 (1987-03-01), Evans, Jr. et al.
patent: 4700129 (1987-10-01), Yoshizawa et al.

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