Apparatus for measuring the intensity and direction of external magnetic fields including power supply and recording units having respective semi-conductor devices

摘要

A device for measuring the intensity and direction of external magnetic fields comprising a differential ferroprobe, a recording unit and a unit for feeding field windings of the ferroprobe, the latter unit including a thyristor, a capacitor one terminal of which is connected to one terminal of a power source and to one lead of the field windings, the other terminal of the capacitor being connected to a cathode of the thyristor and an anode of a diode whose cathode is connected to the other terminal of the power source and a control electrode of the thyristor, the anode of the thyristor being connected to the other lead of the field windings.