Class 360/51 - Data clocking

Subclass of Class 360 - Dynamic magnetic information storage or retrieval
Definition: Subject matter including developing or using a timing signal
No. of patents: 1658
Last issue date: 02/14/2012

«First «Previous1 2 3 4 5 6 7 8 9 10 11 Next»Last»

Number	Title	Issue Date
8116023	Disk drive comprising preamble aligned zoned servo sectors A disk drive is disclosed comprising a disk comprising a plurality of servo sectors defining a plurality of servo tracks, and a head actuated radially over the disk for generating a read signal. Each servo sector comprises a preamble comprising a first end and a sec...	02/14/2012
8116024	Timing recovery detector A timing detector adapted for timing recovery on a read-channel is disclosed to improve signal quality of an input signal and maintain a small loop latency. The timing detector selects bits within the input signal that are high quality for timing recovery and discar...	02/14/2012
8107180	Hard-disk drive and control method for magnetic recording on a patterned medium of the hard-disk drive A hard-disk drive. The hard-disk drive includes a magnetic-recording disk including tracks on which a plurality of patterned bit-cells that are isolated magnetically are aligned at predetermined alignment pitches. The hard-disk drive includes a magnetic-recording he...	01/31/2012
8102615	Data storage apparatus A data storage apparatus includes: a medium for storing data having synchronization marks and data blocks, the synchronization mark and the data block being allocated alternately in the circumference direction of the medium; a head writing data into or reading out d...	01/24/2012
8098449	Magnetic recording device, control device, and magnetic recording device control method A magnetic recording device includes: a magnetic recording medium including a write-synchronization region and a data region; a correction-value-storage unit configured to store therein a phase-correction value for correcting a phase of the write clock; a reading un...	01/17/2012
8089717	Data reproducing apparatus for improving data recording efficiency When the format control circuit detects bit synchronization information in a sector to be reproduced on a magnetic disk, the format control circuit activates a read gate signal for commanding to read out the sector from the magnetic disk. When symbol synchronization...	01/03/2012
8077417	Skip block writing for bit patterned media write synchronization A method for synchronizing writing to a bit patterned media includes: reading bits from skipped blocks on the bit patterned media, using timing of bits read from the skipped blocks to update a write clock, and writing request data to physical blocks on the bit patte...	12/13/2011
8068304	Calibrating servos Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write (SSW) processes. In one aspect, a method is provided that includes determini...	11/29/2011
8054569	Method and apparatus to identify a data band encoded between two servo bands in a sequential information storage medium A method and apparatus is presented to determine a lateral position of a read/write head relative to a sequential information storage medium having a servo signal encoded therein and moving adjacent to the read/write head, where the servo signal comprises a pluralit...	11/08/2011
8049983	Methods and apparatus for performing interpolated timing recovery Methods and apparatus are provided for performing interpolated timing recovery using a frequency and phase estimate. An analog signal representing a sector is asynchronously sampled and stored in a storage device. A retiming circuit reads the stored samples and, bas...	11/01/2011
8045285	Data synchronization for bit insertion or deletion In an implementation, a media drive includes bit patterned magnetic media and a module. The module is to cause data encoded by one or more error correction codes to be written on the bit patterned magnetic media with a constraint that is configured to be used to syn...	10/25/2011
8040628	Synchronous writing with timing error detection in bit patterned media disk drives A hard disk drive that includes a head that is coupled to a disk. The disk drive further includes a comparator circuit that is coupled to the head. The comparator circuit receives a synchronization signal and a write clock. The comparator generates a write error sig...	10/18/2011
8035910	Read after write enhancement for bit patterned media A read/write head for use with bit-patterned media detects write synchronization errors between a write clock and the bit-patterned media. In particular, the read/write head writes data to the bit-patterned media using a write clock. The data is then read from the b...	10/11/2011
8031424	Method and apparatus for testing electronics of a storage system A system including a read channel device and a loopback circuit. The read channel device communicates with a hard disk controller module via a read bus and a write bus. The loopback circuit is configured to selectively loop back the write bus to the read bus. The re...	10/04/2011
8027114	Spiral servo detection with phase-locked loop (PLL) The present disclosure includes apparatus, systems and techniques relating to detecting sync marks. In some implementations, an apparatus includes phase locking circuitry that includes a phase calculator to identify a phase of sampled data, and a phase-locked loop t...	09/27/2011
8023217	Method and system for read gate timing control for storage controllers A device includes a data path configured to transfer data from a read channel device to a host. A read gate delay module is configured to receive a first read gate signal, to output a second read gate signal to the read channel device based on the first read gate si...	09/20/2011
8023216	Calibrating servos Methods, systems, and apparatus, including computer program products are described for calibrating servos, and in some implementations, calibrating spiral servos for use in self-servo-write SSW processes. In one aspect, a method is provide that includes rotating a m...	09/20/2011
8004784	Predictive methods and systems for sampling data read from a rotating storage medium A frequency adjustment system comprises an offset estimation module and a frequency adjustment module. The offset estimation module estimates a distance between data written to a rotating storage medium and a first center location about which the rotating storage me...	08/23/2011
8000049	Self-servo writing using reference patterns with timing correction Methods for writing servo fields on a rotatable data storage disk using reference patterns on the data storage disk include generating a clock signal, reading a reference pattern signal from a surface of the disk, generating a phase error signal in response to a pha...	08/16/2011
8000050	Magnetic storage control apparatus, magnetic storage control method, and magnetic storage apparatus A magnetic storage control apparatus for controlling a magnetic storage apparatus that uses a recording medium having a plurality of reference signals on its track and having a data area between the reference signals. The apparatus includes: a measurement section th...	08/16/2011
8000051	Method for recovering a position and clock period from an input digital signal A method for recovering a position and clock period from an input bi-phase encoded digital signal such as an SPDIF signal counts the intervals between phase changes of the input digital signal to derive the longest interval between the phase changes. The longest int...	08/16/2011
7990646	Data pattern detection using adaptive search windows Method and apparatus for detecting a reference pattern in a transmitted bit sequence. A duration of a search window used to detect the reference pattern is adaptively adjusted in relation to a previous detection of the pattern. This is preferably carried out by usin...	08/02/2011
7974034	Systems and methods for sync mark detection using correlation Systems and methods for detecting and designing enhanced disk sync marks using correlation detection are disclosed. The enhanced sync marks provide better noise immunity and higher detection rates over traditional Viterbi-based detection schemes even with a shorter ...	07/05/2011
7974036	Time-shifted bits for write synchronization correction Systems and methods are provided for correcting write synchronization of a magnetic storage device with respect to magnetic storage media and its corresponding writable magnetic bits, or dots. In particular, these systems and methods involve using time-shifting prin...	07/05/2011
7974035	Timing recovery optimization using disk clock Timing recovery optimization using disk clock. A novel means is presented to perform and provide control of the sampling frequency of a signal that is read from a disk within a hard disk drive (HDD). Two separate, yet somewhat cooperating control loops are employed ...	07/05/2011
7961416	Using readback signals to estimate radial location on a rotating storage device Approaches for estimating the operating radius of a head in a hard-disk drive. These approaches may be used in a constant or approximately constant density servo scheme. Statistics, which describe the proportion of high frequency values to low frequency values in a ...	06/14/2011
7952825	Method and apparatus adjusting reference clock frequency and disk drive using same Provided is an apparatus and method of adjusting reference clock frequency in a disk drive. The reference clock frequency adjustment method includes; measuring each servo sector detection time interval, generating an error signal by subtracting initially set referen...	05/31/2011
7944638	Method and apparatus for scheduling spiral interrupts for self-servo write A method for dynamic spiral ISR scheduling determines a dynamic delay with spiral to spiral spacing information of a disk, so as to ensure that the sum of a primary ISR time and a secondary ISR time does not exceed the wedge to wedge time. The ISR time may be schedu...	05/17/2011
7933089	Track-adapted data clocking A method for writing data to a tape at multiple rates for simultaneously creating data tracks having differing linear data densities, according to one embodiment, includes passing a tape over a head, the head having an array of writers thereon; receiving incoming da...	04/26/2011
7929237	Modulated disk lock clock and methods for using such Various embodiments of the present invention provide systems and methods for controlling access to a magnetic storage medium. As one example, a method for controlling access to a storage medium is disclosed that includes calculating a point to point error amount, an...	04/19/2011
7929238	Disk drive seeking with a fixed rate clock when crossing servo zones to facilitate zoned servo sectors A disk drive is disclosed comprising a disk having a plurality of servo sectors defining a plurality of servo tracks that form a plurality of servo zones. The disk drive further comprises a head actuated radially over the disk for generating a read signal, and contr...	04/19/2011
7924521	Data wedge format table synchronization A control module for a rotating storage medium includes a data wedge format table (DWFT). The control module also includes a buffer control module that has a DWFT queue that includes X entries from the DWFT and one of X first servo information for each of the X entr...	04/12/2011
7920349	Phase adjusting device, magnetic storage medium, and storage device A magnetic storage medium such as a BPM includes a plurality of magnetic dots for writing and reproducing data disposed in a magnetically separated manner so as to be spaced a predetermined distance in a down-track direction and a plurality of tracks concentrically ...	04/05/2011
7911724	Write synchronization phase calibration for storage media A technique is described for write synchronization phase calibration for storage media (e.g., bit patterned media). In one embodiment, a calibration write clock signal may be generated at a frequency offset from a nominal dot frequency of a bit patterned storage med...	03/22/2011
7907362	Magnetic disk controller and method Among other disclosed subject matter, a magnetic disk controller can include an index detecting unit to detect an index of the magnetic disk, an error check code generating unit to, after the index detecting unit detects the index, generate a first error check code ...	03/15/2011
7903360	Recovering servo information from a synchronous servo channel Provided are a method, servo channel, and tape drive for recovering servo information from a synchronous servo channel. An interpolator reads samples of a servo signal obtained from a servo reader at a rate of one servo sample per clock interval, to produce up to M ...	03/08/2011
7903359	Adjustment of divided clock in disk head read circuit A read circuit for providing multi-bit disk data to a disk controller in correspondence to analog data from a disk head, includes a low frequency clock generator whose phase is adjustable in response to a detection of the synchronization marker in the analog disk da...	03/08/2011
7889450	Reduced read/write transition overhead for storage media A technique is described for reducing overhead in a magnetic medium utilizing interspersed timing synchronization fields. In particular, a reader reads timing synchronization fields interspersed within data fields of the medium to obtain timing measurements. The rea...	02/15/2011
7889451	Magnetic recording apparatus and clock signal generating method According to an aspect of the embodiment, in a magnetic recording apparatus having a magnetic recording medium of a patterned media system, a voltage generated between both terminals of a magnetic field generating coil in a case that a DC current is supplied to a re...	02/15/2011
7880991	Write timing system for hard disk drives with bit patterned media A hard disk drive with a patterned disk that has a plurality of data fields. Each data field includes a sync field and a plurality of sync marks. Data is written onto the patterned disk in accordance with a write clock. The write clock is generated and synchronized ...	02/01/2011

«First «Previous1 2 3 4 5 6 7 8 9 10 11 Next»Last»

PatentStorm

Quotables

PatentStorm News

Class 360/51 - Data clocking