Method and apparatus to perform poly-phase instrumentation...

Details Method and apparatus to perform poly-phase instrumentation... Method and apparatus to perform poly-phase instrumentation...

2005-01-04

2005-01-04

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Quality evaluation

Reexamination Certificate

active

06839645

ABSTRACT:
A method and apparatus for generating a poly phase signal set from a single signal output of a single phase instrument. The method comprising: generating a first signal output X representing the single signal output; processing the single signal output to generate a time delayed version Y_Raw of the single signal output by a time delay T; and processing the time delayed version Y_Raw to compensate for frequency changes in the single signal output and generating a second signal output Y of the poly phase signal set. The second signal output Y is displaced from the first signal output X by about 90 degrees.

REFERENCES:
patent: 4635004 (1987-01-01), Ishigaki
patent: 5648736 (1997-07-01), Ishigaki
patent: 6104745 (2000-08-01), Koh
patent: 6236848 (2001-05-01), Igarashi et al.

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