1
John P Squires, Louis J Shrinkle: Method and apparatus for brushless DC motor speed control. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, October 24, 1989: US04876491 (107 worldwide citation)

Control and synchronization of a polyphase, brushless DC motor (used for a hard-disk system) during initial start-up of the motor, is effected by monitoring rotor position using a high-frequency commutation: A short current pulse is applied to each power phase of the motor, and motor current conduct ...


2
John P Squires, Thomas A Fiers, Louis J Shrinkle: Disk drive system controller architecture utilizing embedded real-time diagnostic monitor. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, December 18, 1990: US04979055 (89 worldwide citation)

A disk drive control architecture provides for the storage and retrieval of data with respect to a rotating media and for the transfer of data with respect to a host in response to host commands. The control architecture provides for the execution of a plurality of background processes for controlli ...


3
Louis J Shrinkle, John P Squires: Disk drive system using multiple embedded quadrature servo fields. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, January 10, 1995: US05381281 (53 worldwide citation)

A quadrature based embedded servo control system is provided to realize a high track density, high-performance hard disk drive system. Each data sector includes a gray code field spanning the entire width of the data track and a quad-servo burst pattern having first, second, third, and fourth servo ...


4
John P Squires, Thomas A Fiers, Louis J Shrinkle: Disk drive system controller architecture. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, December 18, 1990: US04979056 (46 worldwide citation)

The control system manages the storage and retrieval of data with respect to a rotating media, wherein an actuator is utilized in the selection of data for storage and retrieval. The control system includes a low level media control circuit that permits the selection of the rotational position of th ...


5
Louis J Shrinkle, John P Squires: Low-power hard disk drive system architecture. Seagate Peripherals, Fliesler Dubb Meyer & Lovejoy, December 29, 1998: US05854720 (44 worldwide citation)

A hard disk drive system operates from a limited power source to provide for the storage of data on the surface of a rotating hard disk media. An embedded controller incorporates a data channel for transferring data with respect to a hard disk media. The controller includes first and second subsecti ...


6
John P Squires, Louis J Shrinkle: Disk drive system employing adaptive read/write channel controls and method of using same. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, June 9, 1992: US05121262 (43 worldwide citation)

The read/write channel is programmatically adaptable to the media used for storing data in response to data signals and the read/write head used to transfer the data signals to and from the media. Adaptability is provided by progammable signal processing elements in the read/write channel. The progr ...


7
Louis J Shrinkle, John P Squires: Low-power hard disk drive system architecture. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, March 28, 1995: US05402200 (31 worldwide citation)

A hard disk drive system operates from a limited power source to provide for the storage of data on the surface of a rotating hard disk media. An embedded controller incorporates a data channel for transferring data with respect to a hard disk media. The controller includes first and second subsecti ...


8
Frederick M Stefansky, Louis J Shrinkle, Thomas A Fiers: Winchester drive card including an actuator arm body, actuator arm plates, and a VCM magnet external to a controlled environment. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, July 2, 1996: US05532889 (27 worldwide citation)

A hard disk drive implemented as a plug-in module has a height of 10 mm and a foot print of 85.6 mm.times.54 mm. The footprint corresponds to the dimensions of memory cards. The disk drive uses a modified suspension in which the load beams are welded to actuator plates, thereby eliminating the use o ...


9
John P Squires, Thomas A Fiers, Louis J Shrinkle: Programmable microcontroller architecture for disk drive system. Seagate Technology, Shawn B Dempster, August 21, 2001: US06279108 (21 worldwide citation)

The software system architecture supports a rotating media in the storage and retrieval of data, where the rotating media stores in data tracks of multiple sectors, through the use of a microcontroller for the execution of a control program that schedules plural control tasks temporally distributed ...


10
Louis J Shrinkle, Charles M Sander: Method and apparatus for compensating track position due to written-in runout error in a disc drive. Seagate Technology, Westman Champlin & Kelly P A, October 20, 1998: US05825578 (20 worldwide citation)

A disc drive device where data and servo position information is stored in data segments on concentric tracks on the disc surface. The servo position information indicates the track centerline for each data segment. The offset of the servo position information from an ideal track centerline for each ...