Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1991-11-15
1992-12-01
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 77G, 324 78Z, 342 99, 342 18, 367 90, 455204, 455216, G01S 736, G01S 742
Patent
active
051682150
ABSTRACT:
An apparatus and method for measuring the frequencies of a pair of signals simultaneously present in a composite signal, comprising the steps of includes components for squaring the composite signal, filtering the squared signal for separating a first pass band and a higher frequency second pass band, instantaneously measuring the frequencies of the first and second pass bands and determining the individual frequencies of the pair of signals from the measured frequencies of the first and second pass bands.
REFERENCES:
patent: 3634766 (1972-01-01), Boyer
patent: 4035799 (1977-07-01), Hsiao
patent: 4053882 (1977-10-01), Vanetten
patent: 4423519 (1983-12-01), Bennett
Gomes David W.
Lockheed Sanders, Inc.
Solis Jose M.
Wieder Kenneth A.
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