Phase measurement in measuring device
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United States of America Patent
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-
Sep 19, 2006
Grant Date -
Jan 27, 2005
app pub date -
May 28, 2004
filing date -
May 30, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and apparatus for determining the phase of a signal in a measurement device having a digital signal processor are described. The signal is digitised and the digitised signal, or a signal derived therefrom, is numerically correlated with a numerically generated reference signal. In one embodiment, the reference signal has a predetermined phase. In a further embodiment, the numerically generated reference signal has a reference phase and the phase is determined from the result of the correlation. The techniques described herein may reduce the amount of information lost in determining the signal phase.
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