| 摘要 |
PURPOSE:To eliminate the effects of switching noises by inhibiting a chopping action for a prescribed period. CONSTITUTION:A switching transistor 5 can be cut off by a transistor 11 during a burst gate period. Therefore no noise is produced during the burst gate period. While no problem is produced even though the switching action is inhibited during the burst gate period since the cut-off frequency of a disk drive motor control loop is equal to about 10 Hz. Thus it is possible to eliminate easily the switching noises during said burst period. This attains a driving circuit for a chopping type disk drive motor which gives no effect to the jitter correction. |
