1
Guoxiao Guo Guoxiao Guo
Honge Wang, Michael Chang, Abhishek Dhanda, Huanxiang Ruan, Guoxiao Guo: Disk drive estimating reader/writer gap across servo zones. Western Digital Technologies, November 5, 2013: US08576506 (107 worldwide citation)

A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors defining a plurality of servo tracks. The servo tracks form a plurality of servo zones. A disk locked clock is synchronized relative to a servo data rate of the servo zone the head is over. A fir ...


2
Guoxiao Guo Guoxiao Guo
Wei Guo, Michael Chang, Guoxiao Guo, Jie Yu: Disk drive adjusting servo timing to compensate for transient when crossing a servo zone boundary. Western Digital Technologies, July 15, 2014: US08780477 (74 worldwide citation)

A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors defining a plurality of servo tracks, wherein the servo tracks form a plurality of servo zones, and a servo data rate of servo sectors in a first servo zone is different than a servo data rate of ...


3
Guoxiao Guo Guoxiao Guo
Guoxiao Guo, Russ A Quisenberry, Wei Guo, Michael Chang, Jie Yu: Data storage device reading servo sector while writing data sector. Western Digital Technologies, June 9, 2015: US09053712 (24 worldwide citation)

A data storage device is disclosed comprising a disk surface comprising a plurality of tracks, wherein each track comprises a plurality of data sectors and a plurality of servo sectors. The data storage device further comprises a head actuated over the disk surface, the head comprising at least one ...


4
Guoxiao Guo Guoxiao Guo
Michael Chang, Guoxiao Guo, Jie Yu: Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary. Western Digital Technologies, March 31, 2015: US08995075 (1 worldwide citation)

A disk drive is disclosed comprising a disk comprising a plurality of servo sectors defining a plurality of servo tracks. The servo tracks form a plurality of servo zones, where a servo data rate of servo sectors in a first servo zone is different than a servo data rate of servo sectors in a second ...


5
Guoxiao Guo Guoxiao Guo
Wei Guo, Michael Chang, Russ A Quisenberry, Richard K Wong, Guoxiao Guo: Data storage device estimating servo zone to reduce size of track address. Western Digital Technologies, January 13, 2015: US08934186 (1 worldwide citation)

A data storage device is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors defining a plurality of servo tracks. The servo tracks form a plurality of servo zones, and at least one servo sector of a servo track comprises a partial track address. A read signal ge ...


6
Guoxiao Guo Guoxiao Guo
Michael Chang, Wei Guo, Yun Hong, Brian P Rigney, Guoxiao Guo: Data storage device servoing heads based on virtual servo tracks. Western Digital Technologies, January 27, 2015: US08941945 (1 worldwide citation)

A data storage device is disclosed comprising a first disk surface comprising servo tracks defined by servo sectors and recorded at a first radial density, and a first head actuated over the first disk surface. A servo sector on the first disk surface is read to generate a first physical position me ...


7
Guoxiao Guo Guoxiao Guo
Richard K Wong, Sanghoon Chu, Guoxiao Guo, Jack M Chue, Carl E Barlow, Wei Guo, Michael Chang: Disk drive compensating for cycle slip of disk locked clock when reading mini-wedge. Western Digital Technologies, May 5, 2015: US09025269

A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo tracks defined by full sectors and intervening short servo sectors, where each full servo sector comprises a preamble, a sync mark, and servo bursts, and each short servo sector comprises a reference pat ...


8
Guoxiao Guo Guoxiao Guo
Michael Chang, Wei Guo, Russ A Quisenberry, Guoxiao Guo: Disk drive detecting mini wedge by evaluating wedge ID of servo sector. Western Digital Technologies, October 6, 2015: US09153263

A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks defined by servo sectors forming a plurality of full wedges and a plurality of mini wedges. The wedge ID field of a servo sector forming one of the full wedges is offset from a beginning of a sync mark ...


9
Michael Chang, Michael A Sokol: Method and apparatus for reducing clock speed and power consumption. Broadcom Corporation, Squire Sanders & Dempsey, September 25, 2007: US07274705 (35 worldwide citation)

A system for reducing clock speed and power consumption in a network chip. The system has a core that transmits and receives signals at a first clock speed. A receive buffer is in communication with the core and configured to transmit the signals to the core at the first clock speed. A transmit buff ...


10
Chi Huang Michael Chang, James W Estep, Albert C Odell II: Recirculatable ball-drop release device for lateral oilwell drilling applications. Halliburton Energy Services, Godley Rose & Tayon P C, November 20, 2001: US06318470 (34 worldwide citation)

A method for disconnecting tubular members and a ball-drop release device including an upper housing connected to tubing and a lower housing connected to a bottom hole assembly. The upper housing includes a recess end having grooves, and the lower housing includes an extension end having splines tha ...