Inventor

CLOKE ROBERT L

27 patents

⚠️ This page may combine multiple inventors who share the name “CLOKE ROBERT L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CLOKE ROBERT L

WESTERN DIGITAL TECH INC

Disk drive for circular self servo writing and spiral self servo writing using prewritten reference servo bursts

Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the disk

Phase locked loop employing a fractional frequency synthesizer as a variable oscillator

Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracks

Using an external spiral servo writer to write spiral tracks to a disk to facilitate writing product servo sectors to the disk

Method for nonsequentially writing reference spiral servo patterns to a disk to compensate for disk expansion

Demodulating servo sectors and spiral tracks using common circuitry

Timing compensation in a self-servowriting system

Computer system comprising a host connected to a disk drive employing read channel IC with common port for data and servo

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

Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model

Method and apparatus for self servowriting of tracks of a disk drive using a servo control loop having a two-dimensional weighted digital state compensator

Using an external spiral servo writer to write spiral reference patterns to a disk to facilitate writing product servo bursts to the disk

Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model

Method and apparatus for self servowriting of tracks of a disk drive using a servo control loop having a two-dimensional digital state compensator

SPERRY RAND CORP

Current controlled oscillator

System for recording and reading back data on a recording media

Tow mode harmonic and nonharmonic phase detector

Sinusoidal oscillator with electronically variable frequency

WESTERN DIGITAL CORP

Polling a preamplifier within a disk drive to remotely determine pre-established parametric values

Disk drive comprising a programmable preamplifier including a multiplexer for selecting between internal digital signals for output to a terminal

Programmable preamplifier unit with serial interface for disk data storage device using MR heads

PRIAM CORP

Composite gate generator circuit for detecting valid data signals

Data processing system including encoder, decoder and write precompensator, using run length limited code

SPERRY CORP

Phase detector with independent offset correction

Composite filter/differentiator

WESTERN DIGITAL

Disk drive employing read channel IC with common port for data and servo