Magnetic head driving device with pre-recording energization with two inductors sharing a common magnetic core

A magnetic head driving device, comprising:

• an inductor for generating a magnetic field during a record operation;
• first current means for energizing said inductor according to a first polarity as a function of a recording signal;
• and
• a second current means for energizing said inductor according to a second and opposite polarity as a function of said recording signal;
• wherein said first and second current means each includes a respective storing means for storing electromagnetic energy;
• said magnetic head driving device further comprises control means for energizing each of said respective storing means as a function of a control signal prior to said record operation;
• and
• said respective storing means having a common medium for receiving said electromagnetic energies released therefrom.

A magnetic head driving device, comprising:

• an inductor for generating a magnetic field, said inductor having a pair of terminals;
• first storing means for storing electromagnetic energy, said first storing means being connected to one of said terminals of said inductor at a first node;
• second storing means for storing an electromagnetic energy, said second storing means being connected to the other terminal of said inductor at a second node;
• first switching means connected to said first node;
• second switching means connected to said second node;
• and
• control means for receiving a signal indicating the direction of a magnetic field generated by said inductor, and for controlling said first and second switching means, in accordance with said signal;
• wherein said first storing means and said second storing means have a common medium for receiving said electromagnetic energies released therefrom.

A magnetic head driving device, comprising:

• an inductor for generating a magnetic field, said inductor having a pair of terminals,
• first storing means for storing an electromagnetic energy, said first storing means being connected to one of said terminals of said inductor at a first node;
• second storing means for storing an electromagnetic energy, said second storing means being connected to the other terminal of said inductor at a second node;
• first switching means connected to said first node;
• second switching means connected to said second node;
• third switching means connected to a terminal of said first storing means located away from said first node;
• fourth switching means connected to a terminal of said second storing means located away from said second node;
• and
• control means for turning on said first switch means and said fourth switch means when said second switch means and said third switch means turn off and for turning off said first switch means and said fourth switch means when said second switch means and said third switch means turn on:
• wherein said first storing means and said second storing means have a common medium for receiving said electromagnetic energies released therefrom.