专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5412518A Individual MR transducer head/disk/channel adaptive bias current system 失效
标题翻译：单个MR换能器头/磁盘/通道自适应偏置电流系统
公开(公告)号：US5412518A
公开(公告)日：1995-05-02
申请号：US168630
申请日：1993-12-16
申请人： Jodie A. Christner , Earl A. Cunningham , Gregory J. Kerwin , Joe M. Poss
发明人： Jodie A. Christner , Earl A. Cunningham , Gregory J. Kerwin , Joe M. Poss
IPC分类号： G11B5/39 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/035 , G11B5/465 , G11B19/02 , G11B5/09
CPC分类号： G11B19/02 , G11B5/012 , G11B5/02 , G11B5/035 , G11B2005/0008 , G11B2005/0018 , G11B5/465
摘要： A method and apparatus is disclosed for adaptively controlling the biasing current applied to magnetoresistive (MR) read heads within a magnetic disk drive to provide optimized bias for each head/disk/channel component combination. An optimized bias current for each head is ascertained and stored on the disk surface at the time of manufacture. During each power up operation the values are transferred to random access memory which is accessed during the execution of each head switch command to apply bias current in accordance with the optimized value to the active MR head. Periodic reoptimization and updating of the stored values is effected by general error measurement circuitry that forms a part of the device control system and is invoked to perform the reoptimization upon the occurrence of an event such as a predetermined duration of power on operation subsequent to the last reoptimization procedure.
摘要翻译：公开了一种用于自适应地控制施加到磁盘驱动器内的磁阻（MR）读取头的偏置电流的方法和装置，以为每个磁头/磁盘/通道组件组合提供优化的偏置。在制造时，确定每个头部优化的偏置电流并将其存储在盘表面上。在每个上电操作期间，这些值被传送到随机存取存储器，随机存取存储器是在执行每个磁头开关命令期间被访问的，以根据优化的值向偏置电流施加偏置电流。存储值的定期重新优化和更新由构成设备控制系统的一部分的一般误差测量电路实现，并且被调用以在事件发生之后执行重新优化，例如在最后一个之后的预定的上电周期重新优化程序。

2. 发明授权

US5790341A Method and apparatus for reducing servo interference in a magneto-resistive head using skew between head and servo pattern 失效
标题翻译：使用磁头和伺服模式之间的偏斜来降低磁阻磁头中的伺服干扰的方法和装置
公开(公告)号：US5790341A
公开(公告)日：1998-08-04
申请号：US530989
申请日：1995-09-20
申请人： Earl A. Cunningham , Jodie A. Christner , Thomas C. Christensen , David T. Flynn , Mark A. Bergquist , Mark D. Hagen
发明人： Earl A. Cunningham , Jodie A. Christner , Thomas C. Christensen , David T. Flynn , Mark A. Bergquist , Mark D. Hagen
IPC分类号： G11B5/39 , G11B5/012 , G11B5/02 , G11B5/11 , G11B5/48 , G11B5/55 , G11B5/584 , G11B5/596 , G11B21/10 , G11B23/00 , G11B5/56
CPC分类号： G11B5/5526 , G11B5/012 , G11B5/4886 , G11B5/4893 , G11B5/584 , G11B5/59683 , G11B23/0007 , G11B5/11
摘要： A method and apparatus is provided which introduces a relative skew between a servo pattern and a magneto-resistive (MR) head in order to reduce interference introduced by inductive reading of shields formed as part of the MR head. The relative skew may be accomplished by introducing a skew angle directly on the head or by skewing the servo pattern formed on the magnetic medium relative to the head. Various skewed patterns may be used to reduce the overall interference.
摘要翻译：提供了一种方法和装置，其引入伺服模式和磁阻（MR）磁头之间的相对偏斜，以便减少由作为MR磁头的一部分形成的屏蔽的感应读出引入的干扰。可以通过在头部上直接引入偏斜角度或者通过使形成在磁性介质上的相对于头部的伺服图案倾斜来实现相对偏斜。可以使用各种偏斜图案来减小总体干扰。

3. 发明授权

US5442492A Data recovery procedure using DC offset and gain control for timing loop compensation for partial-response data detection 失效
标题翻译：使用DC偏移和增益控制的数据恢复程序用于部分响应数据检测的定时环路补偿
公开(公告)号：US5442492A
公开(公告)日：1995-08-15
申请号：US85069
申请日：1993-06-29
申请人： Earl A. Cunningham , Joe M. Poss
发明人： Earl A. Cunningham , Joe M. Poss
IPC分类号： G11B5/00 , G11B5/012 , G11B5/09 , G11B20/10 , G11B20/14 , G11B20/18
CPC分类号： G11B20/10009 , G11B20/1419 , G11B5/09 , G11B2005/0016 , G11B5/012
摘要： Apparatus and method of data recovery are provided for data detection in a partial-response (PR) data channel. The PR data channel includes an analog-to-digital converter (ADC) for providing digital samples of a readback data signal and a voltage controlled oscillator (VCO) timing control coupled to the ADC. A data recovery procedure (DRP) is established responsive to a detected readback error. Using amplitude offset circuitry, amplitude of the readback data signal is selectively adjusted responsive to the detected readback error; and using gain control, a correction current applied to the VCO timing control is changed responsive to the detected readback error.
摘要翻译：提供数据恢复的装置和方法用于部分响应（PR）数据信道中的数据检测。 PR数据通道包括用于提供耦合到ADC的回读数据信号和压控振荡器（VCO）定时控制的数字样本的模拟 - 数字转换器（ADC）。响应于检测到的回读错误建立数据恢复过程（DRP）。使用幅度偏移电路，响应于检测到的回读误差来选择性地调节回读数据信号的幅度; 并且使用增益控制，响应于检测到的回读误差改变施加到VCO定时控制的校正电流。

4. 发明授权

US4821125A Compensation of write current adn delta-V for recording component and radial position 失效
标题翻译：用于记录组件和径向位置的写入电流adn delta-V的补偿
公开(公告)号：US4821125A
公开(公告)日：1989-04-11
申请号：US872793
申请日：1986-06-11
申请人： Thomas C. Christensen , Jonathan D. Coker , Earl A. Cunningham , Richard C. Jaworski , Gregory J. Kerwin , Dean C. Palmer , Jeffrey R. Roepke
发明人： Thomas C. Christensen , Jonathan D. Coker , Earl A. Cunningham , Richard C. Jaworski , Gregory J. Kerwin , Dean C. Palmer , Jeffrey R. Roepke
IPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B5/035 , G11B5/455 , G11B20/18 , G11B27/36
CPC分类号： G11B20/10481 , G11B20/1816 , G11B27/36 , G11B5/012 , G11B5/455 , G11B2005/0013 , G11B2020/183 , G11B5/035
摘要： A magnetic disk drive channel circuitry is shown and described that generates eight incremental values of write current and eight incremental values of delta-V (the minimum voltage change per unit time which tests signals to discriminate between data and noise). Each of these variable parameter values may be program selected by a three bit bus signal. This variability testing of an adaptation to the optimum parameter value for each head media combination and by grouping tracks in contiguous data bands, the parameters may be optimized for tracks near the inner diameter, the outer diameter and in the middle band. The variable delta-V can also be used as an additional data recovery tool wherein re-reading with a lower value enhances recovery of missing bit errors and re-reading with an increased value can assist recovery from an extra bit error.
摘要翻译：显示和描述了磁盘驱动器通道电路，其产生写入电流的八个增量值和delta-V的八个增量值（每单位时间的最小电压变化，其测试信号以区分数据和噪声）。这些可变参数值中的每一个可以由三位总线信号来选择程序。对于每个头部介质组合的最佳参数值的适应性以及通过对连续的数据带中的轨道进行分组的这种可变性测试，可以针对靠近内径，外径和中间带的轨迹优化参数。变量delta-V也可以用作额外的数据恢复工具，其中用较低值重新读取增强了丢失位错误的恢复，并且用增加的值重新读取可以帮助从额外的位错误中恢复。

5. 发明授权

US5245487A Transducer head for rigid disk drive 失效
标题翻译：硬盘驱动器用传感器头
公开(公告)号：US5245487A
公开(公告)日：1993-09-14
申请号：US784067
申请日：1991-10-30
申请人： Earl A. Cunningham
发明人： Earl A. Cunningham
IPC分类号： G11B5/55 , G11B5/596
CPC分类号： G11B5/596 , G11B5/5526
摘要： A dedicated servo transducer head for phase skewed position information signals in servo information tracks of a rigid magnetic disk drive unit has a width spanning up to eight servo information tracks in order to overcome problems in gain irregularity caused by abrupt phase jumps between tracks. An embodiment of the invention includes a track reading surface that varies in sensitivity across the width of the head to avoid gain loss during incremental radial movement with head edges overlying track edge fringes.
摘要翻译：用于刚性磁盘驱动单元的伺服信息轨道中的相位偏移位置信息信号的专用伺服传感器头具有跨越多达八个伺服信息轨迹的宽度，以克服由轨迹之间的突然相位跳跃引起的增益不均匀性的问题。本发明的实施例包括轨迹读取表面，其在头部宽度上的灵敏度变化，以避免增量径向运动期间的增益损失，头部边缘覆盖轨迹边缘条纹。

6. 发明授权

US4305080A Compensating driver circuit for thermal print head 失效
标题翻译：热敏打印头补偿驱动电路
公开(公告)号：US4305080A
公开(公告)日：1981-12-08
申请号：US58593
申请日：1979-07-18
申请人： Earl A. Cunningham , David E. Cutshall , Gerald M. Heiling , Ronald L. Soderstrom , James M. Thompson
发明人： Earl A. Cunningham , David E. Cutshall , Gerald M. Heiling , Ronald L. Soderstrom , James M. Thompson
IPC分类号： B41J2/36 , B41J2/365 , G01D15/10 , H05B1/00
CPC分类号： B41J2/3555 , B41J2/365
摘要： A driver circuit for a thermal printing element varies the power applied to the element, depending upon its recent history of energization, in order to maintain uniform print density desprite temperature variation in the element. A capacitor charges and discharges to measure time intervals since the last element energization to control the voltage applied by an output transistor.
摘要翻译：用于热敏打印元件的驱动器电路根据其最近的通电历史来改变施加到元件的功率，以便保持元件中均匀的印刷密度精确的温度变化。电容器进行充电和放电，以测量自最后一个元件通电的时间间隔，以控制由输出晶体管施加的电压。

7. 发明授权

US6035351A Storage of user defined type file data in corresponding select physical format 失效
标题翻译：以相应的选择物理格式存储用户定义的类型文件数据
公开(公告)号：US6035351A
公开(公告)日：2000-03-07
申请号：US184417
申请日：1994-01-21
申请人： Russell Allen Billings , Dana Henry Brown , Earl A. Cunningham , Richard Greenberg , Hal Hjalmar Ottesen
发明人： Russell Allen Billings , Dana Henry Brown , Earl A. Cunningham , Richard Greenberg , Hal Hjalmar Ottesen
IPC分类号： G11B5/09 , G06F3/06 , G11B5/012 , G11B5/55 , G11B5/596 , G11B7/0037 , G11B19/20 , G11B19/247 , G11B20/10 , G11B20/12 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/00 , G11B27/10 , H04N5/781 , H04N7/173 , G06F13/10
CPC分类号： G06F3/0601 , G11B19/20 , G11B19/247 , G11B20/10 , G11B20/12 , G11B20/1258 , G11B21/00 , G11B21/02 , G11B21/04 , G11B27/002 , G11B27/105 , G11B5/012 , G11B5/5521 , G11B5/5526 , G11B5/5965 , H04N7/17336 , G06F2003/0692 , G11B2220/20 , G11B7/0037 , H04N5/781
摘要： Storing data on a data processing system is done upon generation of a data file by displaying a user interface allowing user selection of storage criteria for the data file. Responsive to user selection of storage criteria for a file determining a physical format type for the file from a plurality of available physical format types. Then the file is stored on a direct access storage device as at least a first record conforming with the determined physical format type.
摘要翻译：通过显示允许用户选择数据文件的存储标准的用户界面来生成数据文件，在数据处理系统上存储数据。响应于用户选择用于从多个可用物理格式类型确定文件的物理格式类型的文件的存储标准。然后将文件作为至少符合所确定的物理格式类型的第一记录存储在直接访问存储设备上。

8. 发明授权

US4860138A Differentially sensitive single track read/write head design with improved biasing 失效
标题翻译：差分敏感的单轨读/写头设计具有改进的偏置
公开(公告)号：US4860138A
公开(公告)日：1989-08-22
申请号：US119501
申请日：1987-11-12
申请人： Albert W. Vinal , Earl A. Cunningham
发明人： Albert W. Vinal , Earl A. Cunningham
IPC分类号： G11B5/127 , G11B5/39
CPC分类号： G11B5/3964 , G11B5/1278 , G11B5/3903 , G11B5/3967
摘要： A simplified structure for a single track read/write head design is disclosed. The design incorporates a simplified write coil structure and an improved and simplified combined magnetic bias and sensor current structure. The active sensing current is utilized both to create an anti-parallel magnetic vector couple in a coupled film magneto resistive sensor and to magnetically bias or torque the anti-parallel couple so that magnetization within the sensor films lies at an angle with the easy magnetic axis. Sensor current is fed in series through an electro-magnetic coil wrapped about the magneto resistive sensor so that sense current simultaneously creates an anti-parallel magnetic vector couple in the sensor and generates an electromagnetic bias field to torque the anti-parallel couple at an angle with the easy axis of magnetization. An improved spirally laid-out planar deposited writing flux coil is positioned about the writing electromagnetic core which greatly simplifies fabrication steps in making the device.

9. 发明授权

US4458280A Servo writing transducer design and writing method 失效
标题翻译：伺服写字传感器的设计和写作方法
公开(公告)号：US4458280A
公开(公告)日：1984-07-03
申请号：US339940
申请日：1982-01-18
申请人： Earl A. Cunningham
发明人： Earl A. Cunningham
IPC分类号： G11B5/012 , G11B5/187 , G11B5/31 , G11B5/596 , G11B5/12 , G11B5/22
CPC分类号： G11B5/012 , G11B5/3116 , G11B5/59633
摘要： A servo writing transducer is shown having transverse side surfaces of the pole pieces adjoining the gap formed to optimize compression of the fringe field at one transverse side to reduce the dead band intermediate servo tracks. The existence of a wider fringe field region at the opposite transverse side is without consequence since the servo writing procedure is to first write the farthest track at the transducer side at which the compressed field occurs followed by each succeeding, adjoining servo track causing the information written in the wide fringe field to be overwritten by the next track.
摘要翻译：示出了伺服写入传感器，其具有与形成的间隙邻接的极片的横向侧表面，以优化在一个横向侧处的边缘场的压缩，以减少死区中间伺服轨迹。在相反的横向侧存在更宽的边缘场区域是没有结果的，因为伺服写入过程是首先在压缩场发生的换能器侧首先写入最后的轨道，随后每个后续的邻接的伺服轨迹写入信息在宽边缘区域被下一个轨道覆盖。

10. 发明授权

US06040955A Self servo writing file 失效
标题翻译：自动伺服写入文件
公开(公告)号：US06040955A
公开(公告)日：2000-03-21
申请号：US287477
申请日：1994-08-08
申请人： Dana Henry Brown , Thomas Charles Christensen , Earl A. Cunningham , Wayne A. Rogelstad
发明人： Dana Henry Brown , Thomas Charles Christensen , Earl A. Cunningham , Wayne A. Rogelstad
IPC分类号： G11B5/596 , G11B27/32 , G11B21/10
CPC分类号： G11B5/59633 , G11B27/322
摘要： A self servo writing file and method for writing servo patterns in a direct access storage device are provided. First servo information is written on a data storage media at a first crash stop. The transducer heads are moved offset from the written servo information while reading the last written servo information until the detected servo signal equals a predetermined value. Then servo information is written on the data storage media responsive to the detected servo signal equal to the predetermined value. The moving and writing steps are sequentially repeating until a second crash stop is reached. A quad-burst servo amplitude pattern or phase pattern can be used for the servo information. The servo writing method is adapted easily for many different servo options. When the file uses a hybrid servo or sector servo, the other surfaces can be written by duplicating the servo bursts with a high bandwidth servo system of the file. Alternatively, the servo writing steps can be repeated for each of the other surfaces for providing head dependent pitch. Variable track pitch can be provided by selectively varying the predetermined value compared with the detected servo signal.
摘要翻译：提供一种用于在直接存取存储装置中写入伺服模式的自伺服写入文件和方法。第一伺服信息在第一次碰撞停止时被写入数据存储介质。当读取最后写入的伺服信息直到检测到的伺服信号等于预定值时，传感器头与写入的伺服信息偏移。然后根据检测到的等于预定值的伺服信号将伺服信息写入数据存储介质上。顺序重复移动和写入步骤，直到达到第二次碰撞停止。伺服信息可以使用四脉冲串伺服幅度模式或相位模式。伺服写入方式适用于许多不同的伺服选项。当文件使用混合伺服或扇区伺服时，其他表面可以通过用文件的高带宽伺服系统复制伺服脉冲串来写入。或者，可以针对每个其他表面重复伺服写入步骤，以提供与头部相关的音调。可以通过与检测到的伺服信号相比选择性地改变预定值来提供可变轨道间距。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式