197879 ⎘
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor; Disposition or mounting of heads relative to record carriers with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks; Circuits Gain control; Filters
MAGNETIC DISK DEVICE
#2Magnetic disk drive and method of setting a notch filter of the drive
#3DATA STORAGE DEVICE WITH NOTCH FILTER CALIBRATION BASED ON MULTI-RATE EXCITATION AND ERROR REJECTION
#4Estimating recording head fly height using machine learning
#5Split-actuator disk drive that uses microactuator feedforward to reduce effects of cross-actuator coupling
#6Data storage device demodulating servo stripes using matched filter
#7Data storage device demodulating servo stripes using matched filter
#8Data storage device using windowed delta-sigma analog-to-digital converter in digital current control loop
#9Split-actuator disk drive that uses microactuator feedforward to reduce effects of cross-actuator coupling
#10Magnetic disk device and actuator control method
#11Magnetic disk device and actuator control method
#12Hysteresis compensation in a disc drive
#13Hysteresis compensation in a disc drive
#14Current-limiting in an amplifier system
#15Adaptive disturbance rejection using dead zone filter
#16Disc device, controlling device and method
#17Generating position error signal based on data tracks for rotating magnetic data storage
#18Compensating for voice coil motor and microactuator disturbance in a hard drive
#19Generating position error signal based on data tracks for magnetic data storage
#20Actuator driver
#21Collection of readback signal modulation data
#22Systems and methods for SNR measurement using equalized data
#23Systems and methods for zone servo timing gain recovery
#24Magnetic disk device and head-position control method
#25Motor drive circuit
#26Method and system for robust attenuation of mechanical resonances using a multi-rate low pass filter
#27Head servo control system and head servo control method
#28Method and apparatus for positioning a magnetic-recording head
#29Servo control of a disk drive
#30Disk drive and servo-control method therefor
#31COLLECTION OF READBACK SIGNAL MODULATION DATA
#32Disk drive and method for head servo control of the disk drive
#33Adaptive data recovery procedure based on radial positioning
#34CONTROLLER AND STORAGE DEVICE
#35Method for estimating position error gain for hard disk drives
#36Hard disk drive and servo track writing system for the same
#37Systems and methods for acquiring modified rate burst demodulation in servo systems
#38Positioning control system and method therefor
#39SETTING METHOD OF MAGNETIC DISK APPARATUS AND MAGNETIC DISK SETTING APPARATUS
#40Disk drive with hybrid analog-digital acceleration feedforward control system and method for rejecting rotational vibration
#41Open loop Ka calibration with low frequency compensation
#42Gain control device, storage device and, gain control method
#43Head position control method, head position control device, and disk device
#44Disk drive adaptive resonance compensation method and apparatus
#45Head position control method, head position control device, and disk device
#46Algorithm for DSA/microactuator total loop gain calibration
#47Infinite impulse response filter circuit and magnetic disk drive
#48Disk drive using a disturbance sensor for disturbance frequency-identification and suppression
#49Adaptive voltage-mode controller for a voice coil motor
#50Biphase magnetic pattern detector using multiple matched filters for hard disk drive
#51Seek servomechanism with extended sinusoidal current profile
#52Disk device, and positioning control method and signal-processing circuit for head
#53Digital-filter engine with pre-compute of output
#54Digitally assisted ultra-fast bandwidth calibration of a programmable analog filter
#55Data storage device computing notch filters for multiple temperatures
#56Data storage device disabling swinging of spindle motor speed based on PES
#57Independent head, dual reader control logic
#58Data storage device employing upsampling to compensate for high frequency repeatable runout
#59System and method for compensating for radial incoherence associated with reading servo sectors
#60Adaptive attenuation for disturbance compensation
#61Data storage device filtering sensor signal to optimize shock and thermal pop detection
#62Hysteresis compensation in a disc drive
#63Data storage device filtering burst correction values before downsampling the burst correction values
#64Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary
#65Servo channel hybrid analog-digital high pass filter
#66Disk drive determining frequency response of actuator near servo sample frequency
#67Disk drive using timing loop control signal for vibration compensation in servo loop
#68Adaptive track follow control