Apparatus for recording and reading binary information on a magnetic disc

摘要

The apparatus is for recording and reading binary information on a magnetic disc (14) of rigid type, with a plurality of concentric recording tracks. Each track comprises a useful zone for storing binary information and a function zone in which information which is used for correct positioning of the head with respect to the central axis of the track is pre-recorded. Moreover, in the function zone of a predetermined track, information identifying this track as a reference track is also pre-recorded. A stepping motor (22) is adapted to position the magnetic recording and reading heads with respect to the tracks of the disc and is driven by a circuit which comprises a voltage source (51) and a voltage boosting circuit (53) which supplies the stepping motor (22) with a voltage (PA) higher than that (PW) supplied by the voltage source (51) during the presence of a command signal (RC) which is emitted by a control unit (15) during the time required to shift the heads from an existing position to a new position.