Method and system for measuring the amplitude and phase angle of

Details Method and system for measuring the amplitude and phase angle of Method and system for measuring the amplitude and phase angle of

1985-12-16

1987-09-22

Levy, Stewart J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

324 77B, 324 78D, 455340, 328109, G01R 2500

Patent

active

046957928

ABSTRACT:
A method and system for simultaneously detecting the amplitude and phase angle of harmonics in a periodic signal. A tunable tracking filter is connected to an input of the system to receive a periodic signal having a frequency within a predictable range. A conditioning circuit is connected to the input to tune the tracking filter to a selected harmonic in the periodic signal. A programmable frequency multiplier forms part of the conditioning circuit and is connected for locking the clock frequency of the filter to tune it to the selected harmonic of the periodic signal to provide at its output an output signal having the amplitude and corresponding phase of the selected harmonic.

REFERENCES:
patent: 3895294 (1975-07-01), Vinding
patent: 3990004 (1976-11-01), Newton
patent: 4316108 (1982-02-01), Rogers, Jr.
patent: 4512194 (1985-04-01), Beuter

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