Inventor
HULL RICHARD W
US19 patents
⚠️ This page may combine multiple inventors who share the name “HULL RICHARD W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WESTERN DIGITAL CORP
11 patentsUS6178056B1Jan 23, 2001
Disk drive employing state variable trap registers for providing stored servo and user data state variables to sampled-data channel
WESTERN DIGITAL CORP201 citations98
US6067206AMay 23, 2000
Method and apparatus to compensate for servo wedge rotational offset after a head switch
WESTERN DIGITAL CORP193 citations97
US5115151AMay 19, 1992
Triple comparator circuit
WESTERN DIGITAL CORP67 citations96
US5956196ASep 21, 1999
Disk drive employing dynamically reconfigured read channel to process a read signal at two different frequencies
WESTERN DIGITAL CORP64 citations94
US5017919AMay 21, 1991
Digital-to-analog converter with bit weight segmented arrays
WESTERN DIGITAL CORP51 citations92
US4947063AAug 7, 1990
Method and apparatus for reducing transient noise in integrated circuits
WESTERN DIGITAL CORP65 citations92
US4859873AAug 22, 1989
CMOS Schmitt trigger with independently biased high/low threshold circuits
WESTERN DIGITAL CORP32 citations92
US4808884AFeb 28, 1989
High order digital phase-locked loop system
WESTERN DIGITAL CORP69 citations89
US5600499AFeb 4, 1997
Tri-bit encoding for disk drive servo track ID information
WESTERN DIGITAL CORP21 citations86
US4519086AMay 21, 1985
MOS Phase lock loop synchronization circuit
WESTERN DIGITAL CORP37 citations86
US4706045ANov 10, 1987
Voltage controlled oscillator with dual loop resonant tank circuit
WESTERN DIGITAL CORP18 citations74
WESTERN DIGITAL TECH INC
5 patentsUS6519104B1Feb 11, 2003
Computer system comprising a host connected to a disk drive employing read channel IC with common port for data and servo
WESTERN DIGITAL TECH INC161 citations98
US6487032B1Nov 26, 2002
Computer system comprising a host connected to a disk drive employing state variable trap registers for providing stored servo and user data state variables to sampled-data channel
WESTERN DIGITAL TECH INC176 citations98
US7028174B1Apr 11, 2006
Disk drive employing a non-volatile serial semiconductor memory for storing a control program for a microprocessor
WESTERN DIGITAL TECH INC167 citations97
US6580573B1Jun 17, 2003
Disk drive having a channel circuit which receives a read signal representing data in a data sector and data in a servo sector in a first order and demodulates the read signal to provide data sector data and servo-sector data in a second order
WESTERN DIGITAL TECH INC150 citations96
US6415349B1Jul 2, 2002
Disk drive with unified channel-disk controller bus for transmitting user data, servo data, and register data
WESTERN DIGITAL TECH INC204 citations96