Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent
1993-03-29
1994-06-21
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
324 7635, 324 7621, 342 20, 342 13, 364484, G01R 2316
Patent
active
053231031
ABSTRACT:
This is an arrangement to find two folding frequencies that fold into one frequency bin, which will save hardware. The input frequency in down converted into I and Q channels. Each channel requires one pair (two) of A/D converters. A total of three pairs of A/D converters are required. All three pairs of A/D converters have the SAME sampling frequency f.sub.s. There is a time delay of .tau. before the second pair of A/D converters, and 2.tau. before the third pair. At the outputs of the A/D converters FFT units followed by a signal processor are used to find the input frequencies by solving non-linear simultaneous equations.
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Choate David B.
Tsui James B. Y.
Franz Bernard E.
Kundert Thomas L.
Solis Jose M.
The United States of America as represented by the Secretary of
Wieder Kenneth A.
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