Method and apparatus for error correction of phase measurement signals
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United States of America Patent
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Dec 26, 1989
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N/A
app pub date -
Jan 10, 1989
filing date -
Jan 16, 1988
priority date (Note) -
Expired
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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.
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