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| Number | Title | Issue Date |
| 7916418 | Apparatus and method for controlling the rotation velocity of an optical disc Method and apparatus for controlling the rotation velocity of an optical disc in a wide range of velocities, including low velocities. In a first range of velocities, a first sensor, for example an EMF sensor, is used to control the commutation moments of a turntabl... | 03/29/2011 |
| 7710681 | Optimizing tape speed for a sync operation Provided are techniques for determining a tape speed for a next sync operation. A sync command is received. An average transaction size and an average host transfer rate of a set of previous sync operations are calculated. The tape speed for the next sync operation ... | 05/04/2010 |
| 7602570 | Motor power controller for a disk drive, disk drive comprising a motor power controller and method for controlling the motor power of a disk drive A motor power controller for a disk drive includes at least two operation states. In a first operation state, the disk drive motor is running continuously, and in a second operation state, the motor is spun up at the beginning of each data operation and spun down at... | 10/13/2009 |
| 7440218 | Charge remover for magnetic disk A loading/unloading type magnetic disk unit includes a magnetic disk that is rotated or driven by a motor, and a head slider bearing a magnetic head and being movable above the magnetic disk owing to a driving mechanism. Herein, at least one projection made of a hig... | 10/21/2008 |
| 7428117 | Servo signal inspecting device and method for inspecting servo signal A servo signal inspection device and a method for detecting servo signal are provided which can measure and evaluate quality of the servo signal on a magnetic tape with a sufficient resolution. The device includes a servo signal inspecting head, a peak detecting mea... | 09/23/2008 |
| 7403459 | Rotational speed control method for a disk player A method is disclosed for adjusting the rotational speed of a disk player based on a calculated variable. The method increases the rotational speed of the disk player when the calculated variable is greater than a first threshold and decreases the rotational speed o... | 07/22/2008 |
| 7394736 | Dynamic speed control method for storage device A method is disclosed for adjusting the rotational speed of a disk drive. According to the method, the proportion of time which the disc drive is reading data from the disc during a unit time T is calculated. Then, the increase of the rotational speed of the motor i... | 07/01/2008 |
| 7375923 | High speed and high capacity data storage array A data storage array is provided such as for a distributed storage system or a consumer electronics device wherein increased data storage capacity is provided at the cost of increased power consumption in relation to industry standard power consumption rates. The ar... | 05/20/2008 |
| 7218469 | Reel driving apparatus and magnetic recording and reproducing device having the same A reel driving apparatus and a magnetic recording and reproducing device including the reel driving apparatus, where the reel driving apparatus includes: a driver including at least a portion protruding under a deck chassis; a power transmitting unit transmitting a ... | 05/15/2007 |
| 7138782 | Motor control system and method of the same The present invention provides a motor control system and method thereof. The motor control system comprises a motor controller and a compensation device. The motor controller is used for generating a motor control output according to a reference signal and a first ... | 11/21/2006 |
| 7136570 | Algorithm to print DV data to a DV deck with frame accuracy DV data is streamed to a DV device without losing the leading section of the streaming data, and in a frame-accurate manner by sending a command to the DV device for performing an absolute track number search for a selected track number. A predetermined number of fr... | 11/14/2006 |
| 7130139 | Write velocity identification A drive and method of identifying write velocity during reading are provided. When a track is being read, the data signal is processed prior to determining the data stream to identify the velocity with which the track data were written. The read channel is adjusted ... | 10/31/2006 |
| 7126299 | Enhanced system and method for controlling discharge of electric energy from machines Certain exemplary embodiments can comprise a method comprising: receiving electrical energy from a braking system of a vehicle at a working coil, the vehicle comprising a first wheel drive comprising a first electric motor; and via the working coil, transferring the... | 10/24/2006 |
| 7110689 | Image heating apparatus with mechanism to prevent twining recording material The image forming apparatus includes a rotatable first rotary member, a rotatable second rotary member brought into pressure contact with the first rotary member, and forming a nip part for nipping and conveying a recording material, first recording material detecto... | 09/19/2006 |
| 7106540 | Ensuring rate of spin-up/spin-down cycles for spindle motor in a hard disk drive does not exceed rate spindle motor is designed to handle A method, computer program product and hard disk drive for restricting a rate of spin-up/spin-down cycles for a spindle motor in a hard disk drive. The firmware in the hard disk drive determines a maximum rate of spin-up/spin-down cycles the spindle motor is designe... | 09/12/2006 |
| 7106016 | Inductive heating system and method for controlling discharge of electric energy from machines Certain exemplary embodiments can comprise a method comprising: receiving electrical energy from a braking system of a vehicle at a working coil, the vehicle comprising a first wheel drive comprising a first electric motor; and via the working coil, transferring the... | 09/12/2006 |
| 7099103 | Methods for controlling the use of a cleaning cartridge for tape drives In one exemplary aspect of the present invention a method for cleaning a media drive transducer head is provided. The method includes transporting a portion of a cleaning tape over a transducer head under a first set of conditions, the first set of conditions associ... | 08/29/2006 |
| 7095201 | Method and apparatus for providing a user selectable start-up current in a disk drive A method and apparatus for providing a user selectable start-up current in a disk drive are provided. A user may select a relatively high start-up current to provide a relatively fast start-up time in a disk drive. Alternatively, the user may select a relatively low... | 08/22/2006 |
| 7092192 | Videotape recording and playback device, and videotape player The object of the present invention is to reduce the load and specification requirements on the network and the video server. The buffer usage rate is counted and supplied to the tape driving controller 7. In the reproduction mode, the tape driving controller... | 08/15/2006 |
| 7012400 | Control circuitry for controlling rotational speed of a DC motor A control circuitry, electrically connected to a DC motor and a variable voltage source for modulating a rotational speed of the DC motor. The control circuitry includes a voltage reference component and a switching circuit. The voltage reference component is electr... | 03/14/2006 |
| 7009492 | Individual quantitative identification by means of human dynamic rhythmic electric activity spectra A system and method for individual quantitative identification by means of human dynamic rhythmic electric activity spectra is provided. The method for distinguishing an individual, comprising; contacting the individual with an electrical probe; measuring, with the ... | 03/07/2006 |
| 6989953 | Disk drive and disk drive-containing device having selectively controllable spindle motor spin up profiles A spindle motor in a disk drive is driven by a driving circuit that, upon receipt of a signal or command, selectively spins up the spindle motor according to a first spin up profile or according to a second spin up profile that is defined to provide a longer spin up... | 01/24/2006 |
| 6956709 | Write velocity identification in a PRML system A tape drive and method of identifying write velocity during reading are provided. When a track is being read, a lead-in code of the data signal is processed prior to determining the data stream. The lead-in code identifies the velocity with which the track data wer... | 10/18/2005 |
| 6954324 | Disk drive disabling BEMF detection window to reduce acoustic noise while using wedge spindle speed control A disk drive is disclosed employing either back electromotive force (BEMF) spindle speed control mode or wedge spindle speed control mode. A BEMF detector monitors the BEMF voltage generated by the windings of the spindle motor to generate a BEMF speed error. The BE... | 10/11/2005 |
| 6940675 | Efficient hard disk drive energy recovery circuit and method and a hard disk drive incorporating the same A hard disk drive energy recovery circuit, a method of recovering energy from a motor of a hard disk drive and a hard disk drive. In one embodiment, the hard disk drive energy recovery circuit includes (1) a spindle resolver that generates transition signals as a sp... | 09/06/2005 |
| 6937416 | Process for controlling the capstan in a video tape recorder (VTR) In a video tape recorder (VTR), the capstan draws the tape from which the video signal is reproduced in a forward direction. The following steps are used to control the capstan, applying a torque to the capstan in a backward direction for a first predetermined perio... | 08/30/2005 |
| 6914740 | Disk drive employing BEMF spindle speed control or wedge spindle speed control A disk drive is disclosed employing either back electromotive force (BEMF) spindle speed control or wedge spindle speed control. The BEMF spindle speed control is used to calibrate a reference time period representing an accumulation of a predetermined number of wed... | 07/05/2005 |
| 6888692 | Method and apparatus for implementing intelligent spin-up for a disk drive A method and apparatus are provided for implementing intelligent spin-up for a disk drive. When a command is received, checking for a disk drive start command is performed. Responsive to identifying the disk drive start command, a no-start flag is checked. Responsiv... | 05/03/2005 |
| 6819072 | Disk drive servo arm retract and spindle brake circuit A spindle motor control circuit for controlling a motor; including a control circuit to control the motor during at least a low state, a pulse state and a high state, the motor braking during said low state, the control circuit receiving a flyback voltage from the m... | 11/16/2004 |
| 6807023 | Method and apparatus for dubbing a recording tape loaded with information Each of slave recorders includes a rotary drum, heads mounted on the rotary drum at positions spaced from a phase reference position on the rotary drum by different angular intervals respectively, and an arrangement for selecting at least one from the heads as an ac... | 10/19/2004 |
| 6795387 | Dynamic speed control method for storage device A method for controlling the rotational speed of a disk player includes first calculating the proportion of time which the disk player is reading data from the disk during a unit time T. Thereafter, the method increases the rotational speed of the disk player if the... | 09/21/2004 |
| 6760176 | Method and apparatus for calibrating a tape transport servo system A method for calibrating a tape transport servo system for a tape drive is disclosed. The tape reel motors are excited when the tape drive is not being controlled by the tape transport servo system. Then, calibration data is collected for the motor torque, motor fri... | 07/06/2004 |
| 6759821 | Disk drive apparatus and motor A disk drive apparatus reproduces a signal from a disk and/or records an signal on the disk. A position detecting part produces a position signal in response to a rotation of a rotor. An activation operation block controls active operation of first and second power ... | 07/06/2004 |
| 6745976 | Data tape speed tachometer using a porous roller bearing A tape roller bearing is provided that prevents the development of an air film between the roller surface and the tape. The spool surface is made from porous material so that air flows through the spool surface. The porous material vents air uniformly over the rolle... | 06/08/2004 |
| 6617817 | Electrical time constant compensation method for switched, voltage-mode driver circuit A power driver for driving a signal on a load using voltage-mode driver. A system processor generates commands indicating a programmed drive signal desired from the voltage-mode driver. A lead compensator determines a compensated command to compensate for... | 09/09/2003 |
| 6560658 | Data storage device with quick and quiet modes Techniques are provided herein for reducing vibrations in various modes of a dynamic system. One such technique comprises incorporating vibration limiting and sensitivity constraints into a partial fraction expansion equation model of the system so as to ... | 05/06/2003 |
| 6541935 | Method for controlling stepping motor A method for controlling a stepping motor that moves an object from an initial position by a target distance. The method includes calculating a moved distance of the object, calculating a remaining moving distance of the object, updating a first velocity ... | 04/01/2003 |
| 6469858 | Motor current consumption control system for a flexible magnetic disk drive or the like A disk drive for use with interchangeable flexible magnetic disks of potentially different weights, comprising a disk drive motor for imparting rotation to a disk loaded therein, and a stepper motor for moving a transducer across the track turns on the di... | 10/22/2002 |
| 6441985 | Media velocity detection for a capstanless tape transport system An apparatus and method are disclosed for detecting the velocity of a tape in a tape transport system having a write head and a read head separated by a known distance and formatting the tape using marks. The tape transport system generates a write signal... | 08/27/2002 |
| 6364234 | Tape loop/slack prevention method and apparatus for tape drive A capstan controlled tape transport mechanism that includes a tape tension controller for preventing tape slack in the tape path is presented. The transport mechanism includes a capstan, a spinnable reel, and a reel motor which controls the speed of revol... | 04/02/2002 |
