Magneto-optical recording device and actuator circuit for use in such magneto-optical recording devices.

摘要

A magneto-optical recording apparatus provided with a magnetic field modulator (8) is revealed. The magnetic-field modulator (8) comprises a field coil (18) for generating a magnetic field and switching means (11, 12,15,16,22) for coupling at least one terminal (17) of the magnet coil (18) to a first potential point (10) at a first potential (Vp) or a second potential point (14) at a second potential (Vn) depending on the logic value of a control signal (Vs), in order to produce in the field coil an alternating current whose polarity depends on the logic value. The field coil (18) is arranged in a parallel resonant circuit (18,21). The switching means comprise means (12,16) for inhibiting, after the terminal (17) has been uncoupled from one of the potential points (10,14), decoupling to the other potential point for a time interval corresponding to half the resonant period of the resonant circuit (18,21). This magnetic-field modulator provides a very rapid reversal of the current through the field coil.