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1. 发明授权

US5923629A Magnetic recording encoder system for a (1,7) channel having a 2/3 coding rate 失效
标题翻译：具有+ E，fra 2/3 + EE编码率的（1,7）通道的磁记录编码器系统
公开(公告)号：US5923629A
公开(公告)日：1999-07-13
申请号：US965112
申请日：1997-11-06
申请人： James E. Noxon , Toan Q. Doan , Paul Jay Hogan
发明人： James E. Noxon , Toan Q. Doan , Paul Jay Hogan
IPC分类号： G11B20/14 , H03M5/14 , H03M7/14 , G11B7/00
CPC分类号： G11B20/1426 , H03M5/145
摘要： An improvement in a system for encoding a data field on a disk with write gate data. The system has an encoder and a data receiving controller for directing write gate data in the form of 0 and 1 bits to the encoder. The encoder, in response to the write gate data, produces a primary code in the form of 0 and 1 bits and directing the primary code to the disk. The primary code has certain predetermined criteria with the encoder producing a secondary coding rate as an exception when the write gate data does not result in the predetermined criteria. The improvement comprises a mechanism for ensuring that the last predetermined number of bits in the data field are free from the exception.
摘要翻译：用于对具有写入门数据的盘上的数据字段进行编码的系统的改进。该系统具有编码器和数据接收控制器，用于将写入门数据以0和1位的形式引导到编码器。编码器响应于写入门数据产生0和1位形式的主要代码，并将主要代码指向磁盘。当写入门数据不产生预定标准时，主码具有某些预定标准，编码器产生次编码率作为例外。该改进包括一种用于确保数据字段中最后一个预定位数不受例外的机制。

2. 发明授权

US06292324B1 Disk drive with compensation values calculated using a non-causal impulse response 有权
标题翻译：使用非因果脉冲响应计算的补偿值的磁盘驱动器
公开(公告)号：US06292324B1
公开(公告)日：2001-09-18
申请号：US09574493
申请日：2000-05-19
申请人： Hai T. Ho , Toan Q. Doan , Bruce A. Liikanen
发明人： Hai T. Ho , Toan Q. Doan , Bruce A. Liikanen
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： The invention relates to a disk drive servo apparatus, and method for implementing the same, that maintains a transducer on a substantially non-perturbed path despite the fact that the tracks were written in a perturbed manner by a servo track writer. The invention utilizes a non-causal filter to determine servo track writer repetitive run-out (STW_RRO) values for each sector of each track at the drive level. The STW_RRO values are stored, preferably in their respective servo sectors on the surface of the disk, for use during track following operations. During read and write operations, the STW_RRO values are retrieved from storage and are used to generate position error signals necessary to maintain the transducer on the desired path.
摘要翻译：本发明涉及一种磁盘驱动器伺服装置及其实施方法，其将传感器维持在基本上不受干扰的路径上，尽管轨道以伺服轨道写入器以扰动方式写入。本发明利用非因果滤波器来确定在驱动级别的每个轨道的每个扇区的伺服轨迹写入器重复跳动（STW_RRO）值。 STW_RRO值最好存储在磁盘表面的各自的伺服扇区中，用于跟踪跟踪操作。在读写操作期间，从存储器中检索STW_RRO值，并用于产生将换能器保持在所需路径上所必需的位置误差信号。

3. 发明授权

US06115203A Efficient drive-level estimation of written-in servo position error 失效
标题翻译：写入伺服位置误差的高效驱动级估计
公开(公告)号：US06115203A
公开(公告)日：2000-09-05
申请号：US16552
申请日：1998-01-30
申请人： Hai T. Ho , Toan Q. Doan , Bruce A. Liikanen
发明人： Hai T. Ho , Toan Q. Doan , Bruce A. Liikanen
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： The invention relates to a disk drive servo apparatus, and method for implementing the same, that maintains a transducer on a substantially non-perturbed path despite the fact that the tracks were written in a perturbed manner by a servo track writer. The invention utilizes a non-causal filter to determine servo track writer repetitive run-out (STW.sub.-- RRO) values for each sector of each track at the drive level. The STW.sub.-- RRO values are stored, preferably in their respective servo sectors on the surface of the disk, for use during track following operations. During read and write operations, the STW.sub.-- RRO values are retrieved from storage and are used to generate position error signals necessary to maintain the transducer on the desired path.
摘要翻译：本发明涉及一种磁盘驱动器伺服装置及其实施方法，其将传感器维持在基本上不受干扰的路径上，尽管轨道以伺服轨道写入器以扰动方式写入。本发明利用非因果滤波器来确定在驱动级别的每个轨道的每个扇区的伺服轨迹写入器重复耗尽（STW-RRO）值。 STW-RRO值优选地存储在盘的表面上的它们各自的伺服扇区中，以便在跟踪操作期间使用。在读写操作期间，从存储器检索STW-RRO值，并用于产生将换能器保持在所需路径上所必需的位置误差信号。

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