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公开(公告)号：US10032467B2
公开(公告)日：2018-07-24
申请号：US15827230
申请日：2017-11-30
发明人： Mark Anthony Gubbins , Robert William Lamberton , Robert Edward Weinstein , James Joseph Touchton
CPC分类号： G11B5/02 , B82Y10/00 , G11B5/3133 , G11B5/746 , G11B5/82 , G11B20/10009 , G11B20/10222 , G11B20/1024 , G11B20/10388 , G11B20/10425 , G11B2005/0005 , G11B2220/252
摘要： 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.
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公开(公告)号：US09959900B1
公开(公告)日：2018-05-01
申请号：US15665311
申请日：2017-07-31
发明人： Scott David Wilson , Hua Zhong
CPC分类号： G11B20/10388 , G11B7/003 , G11B7/094 , G11B7/14
摘要： Operations include compensating for a Tracking Error Signal (TES) offset in an optical tape drive. The tracking error offset compensation system detects a control signal for controlling movement of an optical head across a surface of a tape. The tracking error offset compensation system computes an estimated movement of the optical head, based on the initial control signal. The tracking error offset compensation system determines an estimated TES offset, based on the estimated movement of the optical head. The tracking error offset compensation system uses the estimated TES offset to correct a TES. The tracking error offset compensation system transmits the corrected TES, for controlling additional movement of the optical head.
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公开(公告)号：US20180108378A1
公开(公告)日：2018-04-19
申请号：US15718378
申请日：2017-09-28
CPC分类号： G11B20/1816 , G11B20/10388 , G11B2020/1823
摘要： An optical disc device includes: an optical disc drive that reads data from a plurality of optical discs in which user data is recorded while distributed in the plurality of optical discs; a memory unit in which data read from an optical disc of a first group that is a part of the plurality of optical discs is recorded through the optical disc drive; and a controller that reproduces the user data from data of a remaining optical disc except for the first group, the data of the remaining optical disc being read through the optical disc drive, and the data recorded in the memory unit.
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公开(公告)号：US09928853B2
公开(公告)日：2018-03-27
申请号：US15405216
申请日：2017-01-12
发明人： Nhan X. Bui , Setsuko Masuda , Keisuke Tanaka , Kazuhiro Tsuruta
CPC分类号： G11B5/008 , G06F3/0671 , G06F13/16 , G06F2003/0698 , G11B5/5926 , G11B20/10388 , G11B20/1833 , H03M13/15 , H03M13/19 , H03M13/373 , H03M13/43
摘要： According to one embodiment, a system for processing data includes a controller configured to determine whether a position error signal (PES) is invalid while reading data from a magnetic medium using at least one data channel. The controller is also configured to determine whether a PES value is above a first predetermined threshold in response to a determination that the PES is valid. Moreover, the controller is configured to inject error bits into a data stream in place of corresponding bits of decoded data in response to a determination that the PES is invalid and in response to a determination that the PES value is above the first predetermined threshold. Other systems and methods for processing data are described in accordance with more embodiments.
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公开(公告)号：US09818439B1
公开(公告)日：2017-11-14
申请号：US15073848
申请日：2016-03-18
发明人： Jason Riddering , Huazhou Lou
CPC分类号： G11B5/6029 , G11B5/012 , G11B5/4866 , G11B5/6011 , G11B5/607 , G11B5/6088 , G11B19/046 , G11B20/10314 , G11B20/10388 , G11B2005/0021
摘要： A change in servo active gain control values is determined from a beginning of a writing of a test region of a recording medium to an end of the writing of the test region. The servo active gain control values are read from servo marks by a read transducer of a read/write head during the writing. After writing of the test region, the test region is read by the read transducer to determine a change in recorded amplitude from the beginning of the writing to the end of the writing. A gamma value of the read/write head is determined based on the change in servo active gain control values and the change in recorded amplitude.
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公开(公告)号：US20170256280A1
公开(公告)日：2017-09-07
申请号：US15335835
申请日：2016-10-27
发明人： Kohei NAKATA
IPC分类号： G11B7/09 , G11B7/1353 , G11B20/18 , G11B7/005 , G11B7/13
CPC分类号： G11B7/094 , G11B7/0037 , G11B7/005 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/0943 , G11B7/13 , G11B7/1353 , G11B7/1381 , G11B20/10009 , G11B20/10388 , G11B20/10398 , G11B20/10462 , G11B20/18
摘要： In an optical disc apparatus for reproducing information recorded on a track of an optical disc, an optical head irradiates a light beam onto the track, detects a reflected light reflected by the track, and generates a reproduction signal based on the reflected light. A decoder circuit decodes the reproduction signal, and generates a decoded signal including information recorded on the track. A correlation detector circuit calculates a cross-correlation value between the reproduction signal and the decoded signal. A servo circuit detects a deviation amount of an irradiation position of the light beam onto the track, from the reproduction signal, and controls the irradiation position of the optical head based on the cross-correlation value and the deviation amount.
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公开(公告)号：US09728215B2
公开(公告)日：2017-08-08
申请号：US15088952
申请日：2016-04-01
CPC分类号： G11B5/59627 , G11B5/012 , G11B5/596 , G11B5/59688 , G11B19/041 , G11B20/10009 , G11B20/10305 , G11B20/10388 , G11B20/1217 , G11B20/1889 , G11B27/36 , G11B2020/10898 , G11B2020/1238 , G11B2020/1292 , G11B2020/1869
摘要： A magnetic disk apparatus of one of the embodiments stores read position dependency information on read signal quality of a data region at a first track and measures the read signal quality at a predetermined radial position in a second data region of a second track different from the first track. A positioning error of the second data region is determined based on the read position dependency information and the read signal quality at the predetermined radial position. Data is recorded in a recording target data region in a shingled recording so as to prevent data written in the second data region from being overwritten by data in a recording target data region adjacent to the second data region by using the determined positioning error.
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公开(公告)号：US09564168B2
公开(公告)日：2017-02-07
申请号：US14681002
申请日：2015-04-07
CPC分类号： G11B20/10231 , G11B5/00813 , G11B5/584 , G11B5/5926 , G11B5/59666 , G11B5/59688 , G11B20/10388 , G11B20/18
摘要： In one general embodiment, a method includes determining a sampling interval for an interpolator using at least one of: predefined data stored in memory, and a standard deviation of a position error signal. The method further includes applying the sampling interval to the interpolator in response to determining the sampling interval. In another general embodiment, an apparatus includes an interpolator and a controller. The controller is configured to determine a sampling interval for the interpolator using at least one of: predefined data stored in memory, and a standard deviation of a position error signal. The controller is also configured to apply the sampling interval to the interpolator in response to determining the sampling interval.
摘要翻译： 在一个一般实施例中，一种方法包括使用存储在存储器中的预定义数据和位置误差信号的标准偏差中的至少一个来确定内插器的采样间隔。 该方法还包括响应于确定采样间隔而将采样间隔应用于内插器。 在另一个一般实施例中，一种装置包括内插器和控制器。 控制器被配置为使用存储在存储器中的预定义数据和位置误差信号的标准偏差中的至少一个来确定内插器的采样间隔。 控制器还被配置为响应于确定采样间隔而将采样间隔应用于内插器。
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9.发明授权Preamplifier crosstalk correction in array reader magnetic recording system 有权阵列阅读器磁记录系统中的前置放大器串扰校正公开(公告)号：US09401175B1
公开(公告)日：2016-07-26
申请号：US14805435
申请日：2015-07-21
CPC分类号： G11B20/10388 , G11B5/012 , G11B5/4886
摘要： An apparatus for correcting crosstalk in an array reader magnetic recording system includes an array reader comprising a number of read heads operable to read data from a magnetic storage medium, a preamplifier configured to amplify the signals from the read heads, and a crosstalk correction circuit configured to reduce crosstalk between signals from the read heads.
摘要翻译： 一种用于校正阵列读取器磁记录系统中的串扰的装置，包括阵列读取器，其包括可操作以从磁存储介质读取数据的多个读取头，被配置为放大来自读取头的信号的前置放大器，以及配置 以减少来自读头的信号之间的串扰。
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公开(公告)号：US09263065B2
公开(公告)日：2016-02-16
申请号：US14563851
申请日：2014-12-08
发明人： Nhan X. Bui , Kevin B. Judd , Tomoko Taketomi
CPC分类号： G11B5/00817 , G11B5/0083 , G11B5/09 , G11B5/584 , G11B20/10388 , G11B27/36
摘要： In one embodiment, a method includes determining a stopwrite threshold based on a standard deviation or a variance at a current position error signal sample, and determining whether the current position error signal sample exceeds the stopwrite threshold. Writing is disabled in response to determining that the current position error signal sample exceeds the stopwrite threshold. Writing is enabled in response to determining that the current position error signal sample does not exceed the stopwrite threshold.
摘要翻译： 在一个实施例中，一种方法包括基于当前位置误差信号采样的标准偏差或方差确定阻挡写入阈值，以及确定当前位置误差信号样本是否超过阻止写入阈值。 响应于确定当前位置误差信号样本超过限制写入阈值而禁止写入。 响应于确定当前位置误差信号样本不超过阻止写入阈值，使能写入。
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