Data storage device concurrently controlling and sensing a secondary actuator for actuating a head over a disk

摘要

A data storage device is disclosed comprising a voice coil motor (VCM) and a secondary actuator configured to actuate a head over a disk. A control signal is applied to the secondary actuator while processing a sensor signal generated by the secondary actuator. A vibration signal is generated based on the sensor signal, wherein the vibration signal is a high-pass signal.

主权项

1. A data storage device comprising:
a disk; a head; a voice coil motor (VCM) and a secondary actuator configured to actuate the head over the disk; a sensor capacitor proportional to a capacitance of the secondary actuator; and control circuitry configured to:
apply a control signal to the secondary actuator and concurrently process a sensor signal generated by the secondary actuator; andgenerate a vibration signal based on the sensor signal and the sensor capacitor, wherein a capacitance of the sensor capacitor is at least two times less than a capacitance of the secondary actuator.