An overview of AC bridges is given. The problem of the lack of high-precision small-sized AC bridges is considered. A method is proposed for constructing AC bridges, in which the balancing over a wide measuring range is performed by adjusting only the phases of the set of cardinal balancing signals. The optimal structure and control algorithms for cardinal signals in the process of balancing the bridge are determined. It is shown that the application of the proposed method for constructing bridges makes it possible to create small-sized precision measuring instruments as well as fully integrated devices for precision measurement of impedance parameters. The article describes universal AC bridges with phase control, algorithms for their balancing and calibration.
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Translated from Izmeritel’naya Tekhnika, No. 6, pp. 37–43, June, 2021.
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Surdu, D.M., Surdu, M.N. The Fundamentals of Building AC Bridges with Phase Regulation. Meas Tech 64, 473–480 (2021). https://doi.org/10.1007/s11018-021-01956-8
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DOI: https://doi.org/10.1007/s11018-021-01956-8