Inventor
BYOUN JAESOO
US29 patents
Patents
29 patentsUS10176840B1Jan 8, 2019
Data storage device adjusting spindle motor current based on continuous function of voice coil current during seek
WESTERN DIGITAL TECH INC9 citations84
US10013032B1Jul 3, 2018
Current balancing circuit for multiple supply voltage systems
WESTERN DIGITAL TECH INC8 citations84
US9972348B1May 15, 2018
Data storage device employing smart braking to unload multiple voice coil motors
WESTERN DIGITAL TECH INC11 citations84
US9793912B1Oct 17, 2017
Analog-to-digital conversion circuitry with real-time adjusted gain and resolution
WESTERN DIGITAL TECH INC13 citations84
US9437231B1Sep 6, 2016
Data storage device concurrently controlling and sensing a secondary actuator for actuating a head over a disk
WESTERN DIGITAL TECH INC8 citations84
US10714133B1Jul 14, 2020
Data storage device capable of overriding a servo command to avoid an overcurrent condition
WESTERN DIGITAL TECH INC8 citations82
US11823710B2Nov 21, 2023
Dual spindle motors and dual spindle motor control for data storage
WESTERN DIGITAL TECH INC2 citations73
US11763844B1Sep 19, 2023
Data storage device having dual actuators and method for emergency power off retract (EPOR) of dual actuators
WESTERN DIGITAL TECH INC2 citations73
US11763843B1Sep 19, 2023
VCM PWM to linear mode transition offset optimization to improve PES
WESTERN DIGITAL TECH INC3 citations73
US11749303B2Sep 5, 2023
Data storage device with soft on-disk activation of fine actuators
WESTERN DIGITAL TECH INC2 citations73
US11081988B1Aug 3, 2021
Data storage device with spread spectrum spindle motor control
WESTERN DIGITAL TECH INC2 citations73
US10504553B1Dec 10, 2019
Data storage device transmitting delta servo control value over serial interface
WESTERN DIGITAL TECH INC3 citations73
US10242706B1Mar 26, 2019
Data storage device detecting spindle motor position at increased resolution using mutual inductive sense
WESTERN DIGITAL TECH INC2 citations73
US10242698B1Mar 26, 2019
Data storage device regulating BEMF power voltage during power failure
WESTERN DIGITAL TECH INC3 citations73
US10176835B1Jan 8, 2019
Data storage device employing predictive oversampling for servo control
WESTERN DIGITAL TECH INC3 citations73
US9666224B1May 30, 2017
Data storage device adaptively estimating spindle motor current
WESTERN DIGITAL TECH INC3 citations73
US9620160B1Apr 11, 2017
Data storage device measuring resonant frequency of a shock sensor by inserting the shock sensor into an oscillator circuit
WESTERN DIGITAL TECH INC4 citations73
US9564162B1Feb 7, 2017
Data storage device measuring resonant frequency of a shock sensor by applying differential excitation and measuring oscillation
WESTERN DIGITAL TECH INC4 citations73
US9396751B1Jul 19, 2016
Data storage device compensating for fabrication tolerances when measuring spindle motor current
WESTERN DIGITAL TECH INC3 citations73
US9245577B1Jan 26, 2016
Data storage device comprising spindle motor current sensing with supply voltage noise attenuation
WESTERN DIGITAL TECH INC5 citations73
US10109308B1Oct 23, 2018
Data storage device using programmable deglitch window to detect saturation of VCM current control
WESTERN DIGITAL TECH INC4 citations72
US12266385B2Apr 1, 2025
Data storage device having dual actuators and method for emergency power off retract (EPOR) of dual actuators
WESTERN DIGITAL TECH INC0 citations62
US12254909B2Mar 18, 2025
VCM PWM to linear mode transition offset optimization to improve PES
WESTERN DIGITAL TECH INC0 citations62
US11978482B2May 7, 2024
Data storage device with closed loop extended park mode during spin down operation
WESTERN DIGITAL TECH INC0 citations62
US11862202B2Jan 2, 2024
Data storage device with smart ISOFET threshold voltage automatic tuning
WESTERN DIGITAL TECH INC0 citations62
US11482246B2Oct 25, 2022
Data storage device independently driving outer and inner fine actuators
WESTERN DIGITAL TECH INC1 citations62
US11373678B2Jun 28, 2022
Data storage device using windowed delta-sigma analog-to-digital converter in digital current control loop
WESTERN DIGITAL TECH INC0 citations62
US11837264B2Dec 5, 2023
Data storage device having dual actuators and method for data egress throttling during emergency power off retract (EPOR)
WESTERN DIGITAL TECH INC0 citations52
US11948603B1Apr 2, 2024
Optimize power, RTV, and coupled PES during seek operations
WESTERN DIGITAL TECH INC0 citations50