Reed Smith LLP
Driving circuit for a magnetic head and magnetic recording apparatus
A magnetic head driving circuit includes a main driving circuit symmetrical with respect to a centered recording coil, and at least two pairs of adding circuits, each pair including a positive pulse adding circuit and a negative pulse superposed circuit symmetrical with respect to the centered coil. And, by reversing the direction of the magnetic head coil current, at least one of the adding circuits is made to operate and make it as a magnetic head driving circuit for adding a potential equal to or higher than the power supply, thereby to drive as a sub-driving circuit arranged symmetrically with respect to the centered coil, which promotes the reversal of the magnetic head coil current, and which drives stably with a central potential of the coil at about the disk potential.
Hitachi, Ltd.
G G G
G11B G11B G11B
inventional inventional additional
Yasuyuki Hiroyasu Kenji Yoichiro
Ookuma Yoshizawa Maio Kobayashi