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
John P Squires: Disk drive servo system using gain limited high-frequency track-following compensator. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, September 17, 1991: US05050016 (58 worldwide citation)

The disk drive system includes an actuator, responsive to an adjustment value, for adjusting the position of a data head with respect to data tracks located on the surface of a disk, and a controller coupled to the data head and to the actuator. The controller receives servo information read from th ...


4
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 ...


5
John P Squires, Charles M Sander, Stanton M Keeler, Donald W Clay: Multiple microcontroller hard disk drive control architecture. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, November 9, 1993: US05261058 (48 worldwide citation)

A disk drive architecture controls the transfer of data between a host processor interface and a recording media that includes one or more disk surfaces for storing data. A low-level data controller controls the transfer of data between the disk surfaces and a data buffer. An interface controller co ...


6
John P Squires, Glade N Bagnell, Charles M Sander, Kurt M Anderson: Multiple actuator disk drive. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, March 8, 1994: US05293282 (47 worldwide citation)

A multiple actuator disk drive utilizes multiple heads, associated with respective ones of multiple actuators, to read data from and write data to all tracks on the surface of a disk. The positioning of each head by the respective actuator is controlled by embedded servo-information recorded in the ...


7
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 ...


8
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 ...


9
John P Squires, Charles M Sander, Stanton M Keeler, Donald W Clay: Hard disk drive controller employing a plurality of microprocessors. Conner Peripherals, Fliesler Dubb Meyer & Lovejoy, March 11, 1997: US05610808 (43 worldwide citation)

A controller in a hard disk drive system for controlling the transfer of data and control signals between a plurality of host processors and the disk drive system. The disk drive system including storage media, at least one transducer for recording data on and retrieving data from the storage media ...


10
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 ...