Phase detection method

Details Phase detection method Phase detection method

1984-07-26

1987-03-31

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

329112, 307511, 324 83FE, G01R 2504, H04B 168

Patent

active

046545859

ABSTRACT:
A phase detection method for use, e.g., in impedance measurements, permits accurate phase detections to be performed at a high measurement speed. Two reference signals, phase shifted by 90.degree. from each other, and an input signal are applied to two phase detectors and phase detection is performed. The two reference signals are then both incrementally phase shifted by a predetermined amount and the measurements are again made. Phase incrementation and measurements are repeated until the original phase is reattained and the measurements are then averaged.

REFERENCES:
patent: 4048566 (1977-09-01), Carson
patent: 4196475 (1980-04-01), Hall
patent: 4253118 (1981-02-01), Flasza
patent: 4306297 (1981-12-01), Sugihara
patent: 4409543 (1983-10-01), Sugihara
patent: 4459543 (1984-07-01), McNeil
Hall, Henry P. "An AC-DC Ratiometric and its Use in a CRL Meter"-IEEE Trans. on Inst. & Measurement-Dec. 1973, pp. 387-390.

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