US 11,749,303 B2
Data storage device with soft on-disk activation of fine actuators
Jaesoo Byoun, Irvine, CA (US); Brian Johnson, Laguna Hills, CA (US); Gaku Ikedo, Fujisawa (JP); Hideaki Ito, Fujisawa (JP); and Naoyuki Kagami, Fuisawa (JP)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Dec. 14, 2021, as Appl. No. 17/550,991.
Prior Publication US 2023/0186947 A1, Jun. 15, 2023
Int. Cl. G11B 5/55 (2006.01); G11B 21/10 (2006.01); G11B 5/48 (2006.01); G11B 5/60 (2006.01)
CPC G11B 5/556 (2013.01) [G11B 5/483 (2015.09); G11B 5/4873 (2013.01); G11B 5/5526 (2013.01); G11B 21/106 (2013.01); G11B 5/6017 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A data storage device, comprising:
one or more disks;
an actuator arm assembly comprising one or more actuator arms, and configured to position the one or more actuator arms over disk surfaces of the one or more disks;
one or more fine actuators, disposed on the one or more actuator arms; and
one or more processing devices, configured to:
output a driver current to the one or more fine actuators; and
rate limit a rise of the driver current over time, during an activation of the driver current, to within a selected rate limit of current rise over time.