  Optical magnetometers are currently able to achieve magnetometric
sensitivities below 1 fT/Hz^1/2. Although such sensitivities are typically
obtained for ultra-low-field measurements, a group of optical magnetometers
allows the detection of the fields in much broader dynamic range without a
significant compromise in the sensitivity. A particular example of such a
device is the magnetometer exploiting amplitude-modulated nonlinear
magneto-optical rotation. It enables to measure a magnetic field via detection
of a polarization state of light traversing a medium subjected to the field. In
this paper, an electronic-circuit analogue of such the magnetometer is
elaborated. Its operation is investigated with an electronic-circuit design
software, which allows to study the "magnetometer" performance as a function of
various parameters. The ability to automate operation of the magnetometer and
automatically track "magnetic field" is demonstrated. The simulations are
verified with experimental results obtained with the magnetometer operating in
one of the investigated arrangements.
