Various types of magnetic field sensors, their advantages and disadvantages are considered.
Classic flux-gate magnetometer, the block diagram of which is driven, contains dual- core sensor with counter switching of primary magnetization coil and general output secondary coil for both cores. The disadvantage of this sensor — the complexity of manufacturing and the need for precise balancing of magnetization coil.
The single-core sensor is suggested. It differs from the counterpart by that the magnetizing coil are powered by amplitude modulated alternating current.