公开(公告)号：US20070195446A1

公开(公告)日：2007-08-23

申请号：US11700845

申请日：2007-02-01

申请人： Jong-Yun Yun

发明人： Jong-Yun Yun

IPC分类号： G11B5/02

CPC分类号： G11B5/09

摘要： Provided is a method and an apparatus for controlling a write parameter according to a voltage variation. The method for controlling the write parameter includes monitoring a voltage supplied to a pre-amplifier before performing a write operation and adjusting the write parameter supplied to the pre-amplifier based on the monitoring result. Controlling the write parameter includes reading a predetermined write parameter from a write parameter table based on the monitoring result, and adjusting the read write parameter to the write parameter which will be supplied to the pre-amplifier.

摘要翻译： 提供了一种根据电压变化来控制写入参数的方法和装置。 用于控制写入参数的方法包括在执行写入操作之前监视提供给前置放大器的电压，并且基于监视结果调整提供给前级放大器的写入参数。 控制写入参数包括基于监视结果从写入参数表读取预定的写入参数，并将读取的写入参数调整到将被提供给前置放大器的写入参数。

公开(公告)号：US06958875B2

公开(公告)日：2005-10-25

申请号：US10376082

申请日：2003-02-27

申请人： Jong Yun Yun ,  Yeong Kyun Lee ,  Kang Seok Lee ,  Ho In Sou

发明人： Jong Yun Yun ,  Yeong Kyun Lee ,  Kang Seok Lee ,  Ho In Sou

IPC分类号： G11B5/03 ,  G11B5/55 ,  G11B19/04 ,  G11B20/10 ,  G11B21/08 ,  G11B27/36 ,  G11B33/14

CPC分类号： G11B20/10481 ,  G11B5/03 ,  G11B5/5534 ,  G11B19/04 ,  G11B20/10009 ,  G11B21/083 ,  G11B27/36 ,  G11B33/144 ,  G11B2220/20

摘要： A self-vaccine as used herein will refer to methods of operating a disk drive and the apparatus implementing such methods, which make the disk drive immune to changes in temperature, that keep the disk drive healthy when hot or cold. The invention includes a self-vaccine extending the read channel optimization parameter database of a track zone or sequence to test temperature ranges actually found in the user's operation of the disk drive. The invention also includes the self-vaccine updating the read channel optimization parameter database for an already tested temperature range, whenever there has been sufficient time passed since the read channel optimization was performed for that temperature range. The invention includes read channel optimized parameters for at least temperature ranges within the embedded disk controller, which are updated in the user's operating environment during idle time providing the self-vaccine. The invention includes disk drives including a self-vaccine method.

摘要翻译： 本文所用的自体疫苗将指操作磁盘驱动器的方法和实施这种方法的装置，这使得磁盘驱动器免受温度变化，从而在热或冷时保持磁盘驱动器的健康。 本发明包括扩展轨道区域或序列的读取通道优化参数数据库的自疫苗，以测试在盘驱动器的用户操作中实际发现的温度范围。 本发明还包括对于已经测试的温度范围的读通道优化参数数据库的自疫苗，每当从该温度范围执行读取通道优化已经有足够的时间过去时。 本发明包括用于嵌入式盘控制器内的至少温度范围的读通道优化参数，其在提供自疫苗的空闲时间期间在用户的操作环境中被更新。 本发明包括包括自身疫苗方法的磁盘驱动器。

公开(公告)号：US06624957B1

公开(公告)日：2003-09-23

申请号：US09514164

申请日：2000-02-28

申请人： Jong-Yun Yun

发明人： Jong-Yun Yun

IPC分类号： G11B502

CPC分类号： G11B5/035 ,  G11B5/012 ,  G11B5/02 ,  G11B2005/001 ,  G11B2005/0013

摘要： A circuit for controlling a write current employed in a magnetic disk recording apparatus includes a write unit for delivering the write current to a plurality of magnetic heads to enable writing of data on surfaces of magnetic disks by the magnetic heads. The write current exhibits a first magnitude that varies in dependence upon a second magnitude exhibited by a driving current provided to a write current control terminal of the write unit. A control unit generates pulse width modulated signals having duty cycles corresponding to respective predetermined write current control values to indicate the write current. A write current adjusting unit receives the pulse width modulated signals and delivers the driving current to the write current control terminal of the write unit. The write current adjusting unit adjusts the second magnitude exhibited by the driving current in dependence upon the duty cycles of the pulse width modulated signals. The write current adjusting unit smoothes the pulse width modulated signals, and generates corresponding direct current voltage levels to adjust the second magnitude exhibited by the driving current.

摘要翻译： 用于控制磁盘记录装置中采用的写入电流的电路包括写入单元，用于将写入电流传送到多个磁头，以使得能够通过磁头将数据写入磁盘表面。 写入电流表现出第一幅度，其依赖于提供给写入单元的写入电流控制端的驱动电流而呈现的第二幅度而变化。 控制单元生成具有对应于各个预定写入电流控制值的占空比的脉冲宽度调制信号，以指示写入电流。 写入电流调节单元接收脉冲宽度调制信号并将驱动电流传送到写入单元的写入电流控制端。 写入电流调节单元根据脉冲宽度调制信号的占空比来调节由驱动电流表现的第二幅度。 写入电流调节单元平滑脉宽调制信号，并产生相应的直流电压电平以调整由驱动电流表现的第二幅度。

公开(公告)号：US5731924A

公开(公告)日：1998-03-24

申请号：US529246

申请日：1995-09-15

申请人： Jong-Yun Yun

发明人： Jong-Yun Yun

IPC分类号： G11B21/08 ,  G11B5/55 ,  G11B21/10

CPC分类号： G11B5/553

摘要： A method for following and reading data from a corresponding track on a magnetic disk has two embodiments. Under the first embodiment, an on-track offset value is adjusted upwardly and downwardly in an alternating manner, wherein each successive adjustment increases or decreases by a predetermined step value. Under the second embodiment, maximum and minimum values for the on-track offset value are determined by incrementing the on-track offset value upwardly and downwardly, respectively, an average value based on these maximum and minimum on-track offset values is computed, and the average value is designated as an initial on-track offset value.

摘要翻译： 用于跟踪和读取来自磁盘上相应轨道的数据的方法具有两个实施例。 在第一实施例中，以交替的方式向上和向下调整轨道偏移值，其中每个连续调节增加或减小预定步长值。 在第二实施例中，轨道偏移值的最大值和最小值通过分别向上和向下递增轨道偏移值来确定，计算基于这些最大和最小导磁偏移值的平均值，以及 平均值被指定为初始轨上偏移值。

公开(公告)号：US5440433A

公开(公告)日：1995-08-08

申请号：US126718

申请日：1993-09-27

申请人： Jong-Yun Yun

发明人： Jong-Yun Yun

IPC分类号： G11B20/04 ,  G11B20/10 ,  G11B20/18 ,  H03K5/08 ,  H03K9/08 ,  G11B5/09

CPC分类号： H03K9/08 ,  G11B20/10009 ,  G11B20/1816 ,  H03K5/08

摘要： A circuit and method for variably adjusting a data detecting level by using a pulse with modulation (PWM) signal. The pulse width modulation (PWM) signal having duty corresponding to a predetermined level control value is generated, and the level of the pulse width modulation (PWM) signal is detected to determine the data detecting level to a level corresponding to the detected level. A read test is performed while the level control value is incremented by a given stage from an initial level control value in response to a test mode, to determine the level control value less than that generating a data error by one stage to a maximum value. Further, the read test is implemented while the level control value is decremented by a given stage from the initial level control value, to determine the level control value greater than that generating the data error by one stage to a minimum value. Thus the initial level control value or level control value is obtained by an average value of the maximum and minimum level values. Therefore, the data detecting level adapted for each disk driving apparatus can be adjusted without modifying hardware of each disk driving apparatus, and the data error can be prevented by adaptively adjusting the data detecting level to operating circumstances.

摘要翻译： 通过使用具有调制（PWM）信号的脉冲来可变地调整数据检测电平的电路和方法。 产生具有对应于预定电平控制值的占空比的脉冲宽度调制（PWM）信号，并且检测脉宽调制（PWM）信号的电平，以将数据检测电平确定为与检测电平相对应的电平。 当电平控制值响应于测试模式从初始电平控制值递增给定级时进行读取测试，以确定小于将数据误差产生一级到最大值的电平控制值。 此外，当电平控制值从初始电平控制值递减给定级时，实现读取测试，以确定大于将数据误差产生一级到最小值的电平控制值。 因此，通过最大和最小电平值的平均值来获得初始电平控制值或电平控制值。 因此，可以在不改变每个盘驱动装置的硬件的情况下调整适用于每个盘驱动装置的数据检测水平，并且可以通过根据操作环境自适应地调整数据检测水平来防止数据错误。

公开(公告)号：US07924522B2

公开(公告)日：2011-04-12

申请号：US11751843

申请日：2007-05-22

申请人： Joo-hyun Lee ,  Jong-yun Yun ,  Jae-jin Lee

发明人： Joo-hyun Lee ,  Jong-yun Yun ,  Jae-jin Lee

IPC分类号： G11B5/09

CPC分类号： H04L25/03006 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10425

摘要： An apparatus and a method of detecting an error symbol in a data storage apparatus so that an error correcting performance of an error correction decoder. The error symbol detecting apparatus includes an equalizer equalizing a signal transmitted to a channel using a channel equalization characteristic that is suitable for a corresponding system, a data detector to detect data from the signal output from the equalizer, a modeling tool designed to have the same characteristics corresponding to a partial response (PR) target polynomial applied to the system, a correlation evaluation information generating unit to generate correlation evaluation information based on a correlation degree between an actual output of the equalizer and a target output of the modeling tool, and an error symbol determination unit to determine an order of probability of error generation of the symbols based on the correlation evaluation information, and to determine a predetermined number of symbols having a high probability of generating errors corresponding to the order of probability of error generation as error generating symbols.

摘要翻译： 一种检测数据存储装置中的错误符号以便纠错解码器的纠错性能的装置和方法。 误差符号检测装置包括均衡器，其使用适合于对应系统的信道均衡特性来均衡发送到信道的信号;数据检测器，用于从均衡器输出的信号中检测数据;建模工具，被设计为具有相同的 对应于应用于系统的部分响应（PR）目标多项式的特征的相关性评估信息生成单元，基于均衡器的实际输出与建模工具的目标输出之间的相关度生成相关性评价信息，以及 误差符号确定单元，用于基于所述相关性评估信息来确定符号的错误产生概率的顺序，并且确定具有高概率地产生与所述错误产生的概率的顺序相对应的错误的预定数量的符号作为错误产生 符号。

公开(公告)号：US07636216B2

公开(公告)日：2009-12-22

申请号：US11769955

申请日：2007-06-28

申请人： Jong-yun Yun ,  Joo-hyun Lee

发明人： Jong-yun Yun ,  Joo-hyun Lee

IPC分类号： G11B5/09

CPC分类号： G11B5/40 ,  G11B5/3136

摘要： A method of determining a head characteristic, i.e. determining whether a head has a write characteristic stronger or weaker than that of a normal write head, and a recording medium suitable to perform the method. The method includes detecting a first error rate by writing data and then reading the written data without control pole tip protrusion (PTP) contralto compensate for thermal pole tip protrusion (TPTP) in a state where the head is fully cooled, detecting a second error rate by writing data and then reading the written data with the PTP control in the state where the head is fully cooled, calculating a difference between the first error rate and the second error rate, and determining based on the calculated error rate difference whether the head is a strong write head having a stronger write characteristic than that of the normal write head or a weak write head having a weaker write characteristic than that of the normal write head. Accordingly, since an adjacent track write (ATW) problem, which may occur due to a narrow gap between adjacent tracks, and a weak write problem, which may occur due to a short media recording length per data bit, can be simultaneously considered, high reliability can be secured in terms of recording and reproducing in an HDD.

摘要翻译： 确定头特性的方法，即确定头是否具有比正常写头的写入特性更强或更弱的写入特性，以及适于执行该方法的记录介质。 该方法包括通过写入数据来检测第一错误率，然后在头部被完全冷却的状态下对控制极尖突起（PTP）进行补偿以读取热极尖突起（TPTP），检测第二错误率 通过写入数据，然后在头完全冷却的状态下用PTP控制读取写入的数据，计算第一错误率和第二错误率之间的差，并且基于计算出的差错率来确定头是否是 具有比正常写入头更强的写入特性的强写入头或具有比正常写入头的写入特性更弱的弱写入头。 因此，由于可能由于每个数据比特的短的媒体记录长度而可能发生的相邻轨道之间的窄间隙可能发生的相邻轨道写入（ATW）问题和弱写入问题，因此可以同时考虑高 可以确保在HDD中的记录和再现方面的可靠性。

公开(公告)号：US20060072229A1

公开(公告)日：2006-04-06

申请号：US11241967

申请日：2005-10-04

申请人： Jong-yun Yun ,  Joo-won Cho

发明人： Jong-yun Yun ,  Joo-won Cho

IPC分类号： G11B27/36 ,  G11B5/09

CPC分类号： G11B20/18 ,  G11B5/09 ,  G11B2005/001

摘要： A disk drive, medium, and method controlling a write parameter of a disk drive are provided. The method of compensating for a write parameter, in order to control a write operation of a disk drive, can includes measuring a bit error rate in an optimum write condition and a bit error rate in a weak write condition for a head, and calculating a compensation value for a write parameter corresponding to a difference between the bit error rates in an optimum write condition and the bit error rate in the weak write condition. In a method, according to embodiments of the present invention, a compensation value alpha for compensating a write parameter for a predetermined period of time after the start of a write operation can be generated to prevent a weak write phenomenon at the beginning of the write operation.

公开(公告)号：US06954322B2

公开(公告)日：2005-10-11

申请号：US10376565

申请日：2003-02-27

申请人： Jong Yun Yun ,  Chin Won Cho ,  Hu Yul Bang ,  Jae June Kim

发明人： Jong Yun Yun ,  Chin Won Cho ,  Hu Yul Bang ,  Jae June Kim

IPC分类号： G11B20/10 ,  G11B27/36 ,  G11B5/09

CPC分类号： G11B20/10481 ,  G11B20/10009 ,  G11B27/36 ,  G11B2220/20

摘要： The invention provides a method insuring that each read channel optimization step is controllable in terms of quality divergence, that a systematic response can be made which can be readily automated. The method is applicable to a pre-existing read channel optimization (RCO) script. The method includes the following operations. Acquiring a first quality measure and a first parameter list. Performing the pre-existing RCO script creating a second quality measure and a second parameter list based upon the first parameter list. Convergence processing the first and second quality measures and parameter lists.

摘要翻译： 本发明提供了一种确保每个读取通道优化步骤在质量发散方面是可控的方法，可以容易地自动进行系统响应。 该方法适用于预先存在的读通道优化（RCO）脚本。 该方法包括以下操作。 获得第一个质量度量和第一个参数列表。 执行预先存在的RCO脚本，基于第一参数列表创建第二质量度量和第二参数列表。 收敛处理第一和第二质量度量和参数表。

公开(公告)号：US06175456B1

公开(公告)日：2001-01-16

申请号：US08772986

申请日：1996-12-23

申请人： Jong-Yun Yun

发明人： Jong-Yun Yun

IPC分类号： G11B509

CPC分类号： G11B5/035 ,  G11B5/012 ,  G11B5/02 ,  G11B2005/001 ,  G11B2005/0013

摘要： A circuit for controlling a write current employed in a magnetic disk recording apparatus includes a write unit for delivering the write current to a plurality of magnetic heads to enable writing of data on surfaces of magnetic disks by the magnetic heads. The write current exhibits a first magnitude that varies in dependence upon a second magnitude exhibited by a driving current provided to a write current control terminal of the write unit. A control unit generates pulse width modulated signals having duty cycles corresponding to respective predetermined write current control values to indicate the write current. A write current adjusting unit receives the pulse width modulated signals and delivers the driving current to the write current control terminal of the write unit. The write current adjusting unit adjusts the second magnitude exhibited by the driving current in dependence upon the duty cycles of the pulse width modulated signals. The write current adjusting unit smoothes the pulse width modulated signals, and generates corresponding direct current voltage levels to adjust the second magnitude exhibited by the driving current.

摘要翻译： 用于控制磁盘记录装置中采用的写入电流的电路包括写入单元，用于将写入电流传送到多个磁头，以使得能够通过磁头将数据写入磁盘表面。 写入电流表现出第一幅度，其依赖于提供给写入单元的写入电流控制端的驱动电流而呈现的第二幅度而变化。 控制单元生成具有对应于各个预定写入电流控制值的占空比的脉冲宽度调制信号，以指示写入电流。 写入电流调节单元接收脉冲宽度调制信号并将驱动电流传送到写入单元的写入电流控制端。 写入电流调节单元根据脉冲宽度调制信号的占空比来调节由驱动电流表现的第二幅度。 写入电流调节单元平滑脉宽调制信号，并产生相应的直流电压电平以调整由驱动电流表现的第二幅度。