公开(公告)号：US09998136B1

公开(公告)日：2018-06-12

申请号：US15436709

申请日：2017-02-17

Applicant: Seagate Technology LLC

Inventor： Zheng Wu ,  Jason Vincent Bellorado ,  Marcus Marrow

IPC: H03M1/18 ,  H03M1/12 ,  G11B20/10

CPC classification number: H03M1/18 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10222 ,  H03M1/12 ,  H03M1/124

Abstract: An apparatus may include a circuit configured to generate, by an analog to digital converter (ADC), one or more ADC samples based on an input signal. The circuit may be further configured to generate a first estimated signal using a first channel pulse response estimation with a gain constraint based on the one or more ADC samples and generate a second estimated signal using a second channel pulse response estimation with a phase constraint based on the one or more ADC samples.

公开(公告)号：US20180130492A1

公开(公告)日：2018-05-10

申请号：US15867223

申请日：2018-01-10

Applicant: STMicroelectronics (Rousset) SAS ,  STMicroelectronics (Alps) SAS

Inventor： Jonathan Cottinet ,  Jean Claude Bini

IPC: G11B20/10 ,  H04B15/04 ,  G06F3/16 ,  H04L7/04

CPC classification number: G11B20/10222 ,  G06F3/165 ,  H04B15/04 ,  H04B2215/065 ,  H04L7/04

Abstract: A method for transmitting and/or receiving a potential aggressor audio signal includes a transmission and/or a reception of successive groups of data timed by a first clock signal within respective successive frames synchronized by a second clock signal. In the presence of a risk of interference of the potential aggressor audio signal with a different, potential victim, signal, during the transmission or reception of the potential aggressor audio signal, the frequency of the first clock signal is modified while keeping the frequency of the second clock signal unchanged.

公开(公告)号：US09858962B1

公开(公告)日：2018-01-02

申请号：US15449073

申请日：2017-03-03

Applicant: Kabushiki Kaisha Toshiba

Inventor： Tomokazu Okubo

IPC: G11B21/02 ,  G11B5/596 ,  G11B20/12 ,  G11B5/09 ,  G11B5/012 ,  G11B20/10 ,  G11B20/18

CPC classification number: G11B20/1217 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10222 ,  G11B20/18 ,  G11B2020/1238

Abstract: According to one embodiment, there is provided a disk apparatus including a disk medium and a controller. The disk medium is able to store a signal with three levels in a track. The track includes a first subtrack and a second subtract. The second subtrack is adjacent to the first subtract. The controller performs a first operation based on a selected level among the three levels, a first bit written in the first subtract corresponding to the selected level, and a second bit written in the second subtrack corresponding to the selected level. The first operation is an operation to correct displacement between a write position of a third bit in the first subtrack and a write position of a fourth bit in the second subtrack in a circumferential direction of the disk medium.

公开(公告)号：US09842612B2

公开(公告)日：2017-12-12

申请号：US12571959

申请日：2009-10-01

Applicant: Mark Anthony Gubbins ,  Robert William Lamberton ,  Robert Edward Weinstein ,  James Joseph Touchton

Inventor： Mark Anthony Gubbins ,  Robert William Lamberton ,  Robert Edward Weinstein ,  James Joseph Touchton

IPC: G11B5/09 ,  G11B5/02 ,  B82Y10/00 ,  G11B5/31 ,  G11B5/74 ,  G11B20/10 ,  G11B5/82 ,  G11B5/00

CPC classification number: G11B5/02 ,  B82Y10/00 ,  G11B5/3133 ,  G11B5/746 ,  G11B5/82 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/1024 ,  G11B20/10388 ,  G11B20/10425 ,  G11B2005/0005 ,  G11B2220/252

Abstract: The presently disclosed technology teaches integrating disc drive electronics into a transducer head. Decreased electrical transit times and data processing times can be achieved by placing the electronics on or within the transducer head because electrical connections may be made physically shorter than in conventional systems. The electronics may include one or more of a control system circuit, a write driver, and/or a data buffer. The control system circuit generates a modified clock signal that has a fixed relation to phase and frequency of a bit-detected reference signal that corresponds to positions of patterned bits on the disc. The write driver writes outgoing data bits received from an external connection to off-head electronics directly to the writer synchronized with the modified clock signal. The data buffer stores and converts digital data bits sent from the off-head electronics to an analog signal that is synchronized with the modified clock signal.

公开(公告)号：US09805759B1

公开(公告)日：2017-10-31

申请号：US15449355

申请日：2017-03-03

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Keiichi Kishino

IPC: G11B5/02 ,  G11B20/10 ,  G11B5/09 ,  G11B20/18

CPC classification number: G11B20/10222 ,  G11B5/09

Abstract: An adjusting method for a magnetic disk device including a disk, a head that writes data on the disk, a controller circuit that outputs write data and a control signal related to the write data, and an integrated circuit that outputs a write current to the head, includes adding a delay to a timing of polarity inversion of one bit of the write data or the control signal, outputting the write data and the control signal added with the delay from the controller circuit to the integrated circuit, outputting from the integrated circuit to the head, the write current having a current value that is changed at one of timings of polarity inversion of the write data, according to the control signal, and adjusting a deviation between the write data and the control signal, based on the output write current.

公开(公告)号：US20170278538A1

公开(公告)日：2017-09-28

申请号：US15083135

申请日：2016-03-28

Applicant: HGST Netherlands B.V.

Inventor： Yaw-Shing Tang

IPC: G11B20/10

CPC classification number: G11B20/10222 ,  G11B5/012 ,  G11B5/02 ,  G11B5/455 ,  G11B5/6088 ,  G11B20/10009 ,  G11B20/10037 ,  G11B2005/0021

Abstract: A system for compensating for heat induced transient phase shift in a heat assisted magnetic recording system. A heat assisted magnetic data recording system includes a near field thermal transducer that locally heats the media during writing. The thermal transducer, when activated, results in a change in size of a magnetic transition written to the magnetic media. This change in size of the thermal transition results in a transient phase shift of the data recorded on the magnetic media. The system includes circuitry for predetermining an anticipated amount of transient phase shift and adjusting a subsequent read signal to compensate for the known transient phase shift, thereby eliminating signal errors resulting from the transient phase shift.

公开(公告)号：US09466329B1

公开(公告)日：2016-10-11

申请号：US14852503

申请日：2015-09-12

Applicant: Seagate Technology LLC

Inventor： Richard P. Michel ,  Ray V. Rigles ,  Tong Shirh Stone

IPC: G11B5/02 ,  G11B27/36 ,  G11B20/10

CPC classification number: G11B20/10305 ,  G11B20/10222

Abstract: Methods for determining a variable data frequency for recording data on a zone of a magnetic storage disc, each zone including a plurality of tracks and each track including a plurality of sectors, the method includes measuring a signal to noise ratio (S/N) around at least a first track in a first zone; and modulating a data frequency based on the measured S/N around the first track.

Abstract translation: 用于确定用于在磁存储盘的区域上记录数据的可变数据频率的方法，每个区域包括多个轨道，每个轨道包括多个扇区，所述方法包括测量周围的信噪比（S / N） 至少在第一区域中的第一轨道; 以及基于所测量的第一轨道周围的S / N来调制数据频率。

公开(公告)号：US09196302B1

公开(公告)日：2015-11-24

申请号：US14662163

申请日：2015-03-18

Applicant: Western Digital Technologies, Inc.

Inventor： Chin Phan Kuan ,  Nikki Poh Ling Khew ,  Wai Shin Chin

IPC: G11B21/02 ,  G11B23/50 ,  G11B5/55 ,  G11B20/10

CPC classification number: G11B20/10527 ,  G11B5/40 ,  G11B5/5526 ,  G11B20/10222 ,  G11B23/505

Abstract: An apparatus includes: a media; a head over the media; a read channel, coupled to the head, configured to extract data from the media; control circuitry, coupled to the read channel, configured to execute a read command; and wherein the read channel is further configured to: generate, based on extracting the data from the media, a data condition indicator, and provide, for use by the control circuitry, the data and the data condition indicator.

Abstract translation: 一种装置包括：媒体; 媒体头 耦合到头部的读通道，被配置为从媒体提取数据; 耦合到读通道的控制电路，被配置为执行读命令; 并且其中所述读通道还被配置为：基于从所述介质提取所述数据来生成数据条件指示符，并且为所述控制电路提供所述数据和所述数据条件指示符。

公开(公告)号：US09129649B2

公开(公告)日：2015-09-08

申请号：US13684116

申请日：2012-11-21

Applicant: MARVELL INTERNATIONAL LTD.

Inventor： Chun Lian Ong ,  Zhimin Yuan ,  Jingliang Zhang ,  Bo Liu

IPC: G11B20/10

CPC classification number: G11B20/10222 ,  G11B20/10259

Abstract: According to embodiments of the present invention, a method for providing a synchronization signal for at least one of a read operation or a write operation carried out by means of a head in a data storage device is provided. The method includes obtaining a readback servo signal from a storage medium of the data storage device by means of the head, the readback servo signal having at least one frequency associated with a servo track of the storage medium, frequency mixing the readback servo signal with a local signal having a local frequency to provide a frequency mixed signal, and filtering the frequency mixed signal to provide the synchronization signal for at least one of the read operation or the write operation. According to further embodiments of the present invention, a data storage device is also provided.

Abstract translation: 根据本发明的实施例，提供一种用于提供用于通过数据存储装置中的磁头执行的读取操作或写入操作中的至少一个的同步信号的方法。 该方法包括通过头部从数据存储装置的存储介质获得回读伺服信号，回读伺服信号具有与存储介质的伺服轨道相关联的至少一个频率，将回读伺服信号与 具有本地频率以提供频率混合信号的本地信号，以及对频率混合信号进行滤波以为读取操作或写入操作中的至少一个提供同步信号。 根据本发明的另外的实施例，还提供了数据存储装置。

公开(公告)号：US09129648B2

公开(公告)日：2015-09-08

申请号：US14158739

申请日：2014-01-17

Applicant: LSI Corporation

Inventor： George Mathew ,  Bruce A. Wilson ,  Jongseung Park

IPC: G11B20/10 ,  G11B5/09

CPC classification number: G11B20/10046 ,  G11B5/09 ,  G11B20/10055 ,  G11B20/10222 ,  G11B20/10268

Abstract: An apparatus for reading data includes an array of analog inputs operable to receive analog signals retrieved from a magnetic storage medium, wherein the analog inputs correspond to multiple data tracks on the magnetic storage medium, and wherein the number of analog inputs in the array of analog inputs is greater than the number of data tracks being read, at least one joint equalizer operable to filter the analog inputs to yield an equalized output for each of the data tracks being read, and at least one data detector operable to apply a detection algorithm to the equalized output from the joint equalizer to yield detected values for each of the data tracks being read.

Abstract translation: 一种用于读取数据的装置包括可操作以接收从磁存储介质检索的模拟信号的模拟输入阵列，其中所述模拟输入对应于所述磁存储介质上的多个数据磁道，并且其中所述模拟输入阵列中的模拟输入的数量 至少一个联合均衡器可操作以对模拟输入进行滤波，以产生正被读取的每个数据轨道的均衡输出，以及至少一个数据检测器，可操作以将检测算法应用于 来自联合均衡器的均衡输出，以产生正被读取的每个数据轨道的检测值。