It is shown that, in magnetomodulation sensors of a weak magnetic field with amorphous ferromagnetic cores, the signals of an amplitude-modulated high-frequency magnetic field, the frequency of which lies above the passband of the sensors, are partially transferred to a low-frequency band. Part of the high-frequency magnetic noise is redistributed by the sensor into the low-frequency band, which contributes to the observed dependence of the amplitude of 1/f noise.
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O. L. Sokol-Kutylovskii, “An autoparametric magnetic induction sensor,” Datch. Sistemy, No. 1, 37–38 (2009).
O. L. Sokol-Kutylovskii, “The resolving power of magnetic modulation sensors with an amorphous ferromagnetic core,” Izmer. Tekhn., No. 3, 55–57 (2011); Measur. Techn., 54, No. 3, 55–57 (2011).
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Translated from Metrologiya, No. 6, pp. 39–44, June, 2012.
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Sokol-Kutylovsky, O.L. The effect of an amplitude-modulated high-frequency magnetic field on the low-frequency noise of an amorphous ferromagnetic sensor. Meas Tech 55, 702–705 (2012). https://doi.org/10.1007/s11018-012-0024-x
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DOI: https://doi.org/10.1007/s11018-012-0024-x