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1. 发明授权

US07006317B1 Dynamically allocated parallel equalization and detection of a PRML read channel in a multi-channel drive 有权
标题翻译：在多通道驱动中动态分配PRML读通道的并行均衡和检测
公开(公告)号：US07006317B1
公开(公告)日：2006-02-28
申请号：US10729646
申请日：2003-12-05
申请人： Mark Hennecken , Richard A. Gill , Keith Boyer
发明人： Mark Hennecken , Richard A. Gill , Keith Boyer
IPC分类号： G11B5/035
CPC分类号： G11B20/10009 , G11B20/10055 , G11B2220/90
摘要： A tape drive for use with magnetic tapes includes a housing for receiving a magnetic tape having multiple parallel tracks, and a tape head for reading and writing the parallel tracks of the magnetic tape. A plurality of partial response maximum likelihood (PRML) equalization/detection channels are provided for processing the data signals to determine the data stream for each data signal. The plurality of PRML equalization/detection channels includes at least one PRML equalization/detection channel pre-assigned to each track. The plurality of PRML equalization/detection channels further includes at least one floating PRML equalization/detection channel dynamically assignable on an as-needed basis. The invention also contemplates an ASIC, a generic drive, and a PRML method.
摘要翻译：用于磁带的磁带驱动器包括用于接收具有多个平行磁道的磁带的壳体和用于读取和写入磁带的平行磁道的磁带头。提供多个部分响应最大似然（PRML）均衡/检测通道用于处理数据信号以确定每个数据信号的数据流。多个PRML均衡/检测通道包括预分配给每个轨道的至少一个PRML均衡/检测通道。多个PRML均衡/检测通道进一步包括至少一个根据需要可动态分配的浮动PRML均衡/检测通道。本发明还考虑了ASIC，通用驱动器和PRML方法。

2. 发明授权

US07675710B2 Tape drive with read/write head having legacy read elements and with special-purpose read channels 有权
标题翻译：具有读/写头的磁带驱动器具有传统读取元件和专用读通道
公开(公告)号：US07675710B2
公开(公告)日：2010-03-09
申请号：US11448221
申请日：2006-06-07
申请人： Mark Hennecken , Matthew Wojciechowski
发明人： Mark Hennecken , Matthew Wojciechowski
IPC分类号： G11B5/39
CPC分类号： G11B5/00878 , G11B5/29
摘要： A tape drive for reading both new technology tapes and legacy tapes. The tape drive includes a three bump head with two outer read bumps and an inner write bump. The outer read bumps include readers for reading data from tracks of a first width on a first storage tape while the inner write bump includes writers for writing data in tracks of the first storage tape. Legacy readers are provided in the head to read data from tracks of a second width that is greater than the first track width on a second storage tape. The legacy readers are provided by piggybacking or merged-pole techniques in the inner write bump or are provided in one or both of the outer read bumps. The tape drive includes control circuitry with channels for processing data signals from the narrower readers and channels for processing data signals from the wider legacy readers.
摘要翻译：用于读取新技术磁带和传统磁带的磁带机。磁带驱动器包括具有两个外部读取凸起和内部写入凸起的三个凸起头。外部读取凸块包括用于从第一存储带上的第一宽度的轨道读取数据的读取器，而内部写入凸起包括用于在第一存储带的轨道中写入数据的写入器。传统的读取器被提供在头部以从第二个宽度的轨道读取数据，该第二宽度大于第二个存储磁带上的第一个磁道宽度。遗留阅读器通过在内部写入凸起中的搭载或合并技术提供，或者设置在外部读取凸块的一个或两个中。磁带驱动器包括控制电路，其具有用于处理来自较窄读取器的数据信号的通道和用于处理来自更广泛的传统读取器的数据信号的通道。

3. 发明授权

US06710967B2 High frequency and low frequency servo pattern 有权
标题翻译：高频和低频伺服模式
公开(公告)号：US06710967B2
公开(公告)日：2004-03-23
申请号：US10034763
申请日：2001-12-28
申请人： Mark Hennecken , Robert G. Brocko , Steven G. Trabert , Ronald D. Gillingham
发明人： Mark Hennecken , Robert G. Brocko , Steven G. Trabert , Ronald D. Gillingham
IPC分类号： G11B5584
CPC分类号： G11B5/584
摘要： Servo tracks combine low frequency transitions for fine transverse positioning with high frequency fields providing additional information. In one embodiment, each servo frame has a first field of recorded low frequency transitions, a second field of recorded low frequency transitions, and at least one high frequency field. The first low frequency field transitions are recorded on the tape such that a peak of each first field transitions varies in longitudinal position across the width of the servo frame. The second field of low frequency transitions are recorded on the tape such that a peak of each second field transition is not parallel with the peak of any first field transition. High frequency fields may provide one or more of timing information, longitudinal position information and gross transverse position information.
摘要翻译：伺服轨道组合了低频转换，用于精细的横向定位和高频场，提供附加信息。在一个实施例中，每个伺服帧具有记录的低频转换的第一场，记录的低频转换的第二场和至少一个高频场。第一低频场转变被记录在磁带上，使得每个第一场跃迁的峰值在纵向位置跨越伺服帧的宽度变化。低频转换的第二场记录在磁带上，使得每个第二场跃迁的峰值不与任何第一场跃迁的峰值平行。高频场可以提供定时信息，纵向位置信息和总横向位置信息中的一个或多个。

4. 发明授权

US07478315B1 Parallel spectral equalization channels with low density parity check codes 有权
标题翻译：具有低密度奇偶校验码的并行频谱均衡信道
公开(公告)号：US07478315B1
公开(公告)日：2009-01-13
申请号：US10674215
申请日：2003-09-29
申请人： Mark Hennecken , David J. Pereira
发明人： Mark Hennecken , David J. Pereira
IPC分类号： H03M13/03
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10212 , G11B20/10296 , G11B2220/90 , H03M13/1102 , H03M13/2906 , H03M13/4146 , H03M13/6331
摘要： The present invention combines low density parity checking with parallel equalization channels to enhance data retrieval from tape. Viterbi analysis is done as a precursor to the use of at least one low density parity decoder. A signal decoder may include a plurality of viterbi processors and at least one low density parity check decoder. The decoder may receive a plurality of pulse-shaped signals and produces decoded output signals.
摘要翻译：本发明结合了低密度奇偶校验与并行均衡信道，以增强从磁带的数据检索。维特比分析作为使用至少一个低密度奇偶校验解码器的前兆完成。信号解码器可以包括多个维特比处理器和至少一个低密度奇偶校验解码器。解码器可以接收多个脉冲信号并产生解码的输出信号。

5. 发明授权

US07019930B1 Digital filtering and digital automatic gain control for a variable speed read channel 有权
标题翻译：用于可变速读取通道的数字滤波和数字自动增益控制
公开(公告)号：US07019930B1
公开(公告)日：2006-03-28
申请号：US10244294
申请日：2002-09-16
申请人： Mark Hennecken
发明人： Mark Hennecken
IPC分类号： G11B5/03 , G11B5/09
CPC分类号： G11B20/10009 , G11B5/027 , G11B5/09 , G11B20/10055
摘要： A method and system are disclosed for providing a variable speed digital read channel. The read channel includes an analog portion and a digital portion. The read channel includes an analog-to-digital converter (ADC) for converting an analog read signal into a sampled read signal. The ADC is synchronized to a sample clock. The sample clock has a variable clock rate. The digital portion includes a digital filter for reducing noise. The digital filter can be implemented as a low pass filter (LPF), a high pass filter (HPF), or a bandpass filter (BPF). The filter receives the sampled read signal from the ADC. The digital filter is synchronized to the sample clock. The digital filter's cutoff frequencies adjust automatically as the variable clock rate is changed, and does not require reprogramming. The digital portion may also include a digital automatic gain control device.
摘要翻译：公开了用于提供可变速数字读通道的方法和系统。读通道包括模拟部分和数字部分。读通道包括用于将模拟读取信号转换为采样读取信号的模数转换器（ADC）。 ADC与采样时钟同步。采样时钟具有可变时钟频率。数字部分包括用于降低噪声的数字滤波器。数字滤波器可以实现为低通滤波器（LPF），高通滤波器（HPF）或带通滤波器（BPF）。滤波器从ADC接收采样的读取信号。数字滤波器与采样时钟同步。数字滤波器的截止频率随着可变时钟频率的变化而自动调整，不需要重新编程。数字部分还可以包括数字自动增益控制装置。

6. 发明授权

US08006172B2 Auxiliary path iterative decoding 有权
标题翻译：辅助路径迭代解码
公开(公告)号：US08006172B2
公开(公告)日：2011-08-23
申请号：US11775748
申请日：2007-07-10
申请人： Keith G. Boyer , Jin Lu , Mark Hennecken
发明人： Keith G. Boyer , Jin Lu , Mark Hennecken
IPC分类号： H03M13/03 , G06F11/00
CPC分类号： H03M13/1105 , H03M13/47 , H03M13/6561
摘要： A parallel iterative decoding system interposed between a network interface and a block memory matrix receives encoded data and both stores the data in a First-In-First-Out (“FIFO”) memory block and processes it through a timing recovery engine. The timing recovery engine delivers to an iterative decoder synchronized data samples and detects cycle slip. The iterative decoder thereafter performs a predetermined number of iterations to decode the data. Responsive to encoded data failing to converge after the predetermined number of iterations, the encoded data is communicated from the FIFO memory to an auxiliary decoder module. The auxiliary iterative error correction code decoder performs a second predetermined number of iterations to decode the data wherein the number of iterations performed by the auxiliary iterative error correction code decoder is greater than the primary iterative error correction code decoder. Converged data from the auxiliary decoder replaces otherwise null data stored in the block matrix memory.
摘要翻译：插入在网络接口和块存储器矩阵之间的并行迭代解码系统接收编码数据，并将数据存储在先进先出（“FIFO”）存储器块中，并通过定时恢复引擎进行处理。定时恢复引擎提供迭代解码器同步数据采样并检测周期滑移。迭代解码器此后执行预定数量的迭代来解码数据。响应编码数据在预定次数的迭代之后不能收敛，编码数据从FIFO存储器传送到辅助解码器模块。辅助迭代纠错码解码器执行第二预定次数的迭代以解码其中由辅助迭代纠错码解码器执行的迭代次数大于主迭代纠错码解码器的数据。来自辅助解码器的汇聚数据替换存储在块矩阵存储器中的空数据。

7. 发明授权

US06744594B2 Servo write head with gaps for writing high and low frequency transitions 有权
标题翻译：伺服写头具有写入高频和低频转换的间隙
公开(公告)号：US06744594B2
公开(公告)日：2004-06-01
申请号：US10034567
申请日：2001-12-28
申请人： Edward V. Denison , Mark Hennecken , Mark L. Watson , Steven G. Trabert
发明人： Edward V. Denison , Mark Hennecken , Mark L. Watson , Steven G. Trabert
IPC分类号： G11B5265
CPC分类号： G11B5/584 , G11B5/4893 , G11B27/322 , G11B2220/90
摘要： A servo track write head writes low frequency transitions for fine transverse positioning and high frequency fields providing additional information. The servo track write head includes a first write gap with at least one gap section at a first angle relative to a tape direction. A second write gap has at least one gap section at a second angle, not equal to the first angle. The first and second write gaps write low frequency transitions in each servo frame. A third write gap writes high frequency transitions in each servo frame.
摘要翻译：伺服磁道写入头写入低频转换，用于精细横向定位和提供附加信息的高频场。伺服磁道写入头包括与相对于磁带方向成一定角度的至少一个间隙部分的第一写入间隙。第二写入间隙具有不等于第一角度的第二角度的至少一个间隙部分。第一和第二写入间隙写入每个伺服帧中的低频转换。第三个写入间隙在每个伺服帧中写入高频率转换。

8. 发明授权

US07911730B2 Magnetic head and tape drive for reading multiple data formats 有权
标题翻译：用于读取多种数据格式的磁头和磁带机
公开(公告)号：US07911730B2
公开(公告)日：2011-03-22
申请号：US12116533
申请日：2008-05-07
申请人： Mark Hennecken
发明人： Mark Hennecken
IPC分类号： G11B5/584
CPC分类号： G11B5/00878
摘要： A magnetic head is provided for reading and writing data on a data storage media. A first writer and a first reader write and read data of a first format. A second reader reads data of a second format having different read channels than the first format. A third reader has a width greater than that of the of the first and second readers, and reads data of a third format wider than that of the first and second formats. A tape drive is disclosed with the magnetic head and control circuitry having read channels for each of the readers. A method for fabricating a magnetic head is disclosed by providing first and second bumps each with a reader and writer of a first format, and a third bump with a reader of a second format and a reader of a third format.
摘要翻译：提供磁头用于在数据存储介质上读取和写入数据。第一个写入器和第一个读取器写入和读取第一格式的数据。第二读取器读取具有与第一格式不同的读取通道的第二格式的数据。第三读取器的宽度大于第一和第二读取器的宽度，并且读取比第一和第二格式宽的第三格式的数据。公开磁带驱动器，磁头和控制电路具有用于每个读取器的读取通道。通过提供具有第一格式的读写器的第一和第二凸块以及具有第二格式的读取器和第三格式的读取器的第三凸块来公开制造磁头的方法。

9. 发明申请

US20090279205A1 MAGNETIC HEAD AND TAPE DRIVE FOR READING MULTIPLE DATA FORMATS 有权
标题翻译：磁头和磁带驱动器，用于读取多种数据格式
公开(公告)号：US20090279205A1
公开(公告)日：2009-11-12
申请号：US12116533
申请日：2008-05-07
申请人： Mark Hennecken
发明人： Mark Hennecken
IPC分类号： G11B5/127
CPC分类号： G11B5/00878
摘要： A magnetic head is provided for reading and writing data on a data storage media. A first writer and a first reader write and read data of a first format. A second reader reads data of a second format having different read channels than the first format. A third reader has a width greater than that of the of the first and second readers, and reads data of a third format wider than that of the first and second formats. A tape drive is disclosed with the magnetic head and control circuitry having read channels for each of the readers. A method for fabricating a magnetic head is disclosed by providing first and second bumps each with a reader and writer of a first format, and a third bump with a reader of a second format and a reader of a third format.
摘要翻译：提供磁头用于在数据存储介质上读取和写入数据。第一个写入器和第一个读取器写入和读取第一格式的数据。第二读取器读取具有与第一格式不同的读取通道的第二格式的数据。第三读取器的宽度大于第一和第二读取器的宽度，并且读取比第一和第二格式宽的第三格式的数据。公开磁带驱动器，磁头和控制电路具有用于每个读取器的读取通道。通过提供具有第一格式的读写器的第一和第二凸块以及具有第二格式的读取器和第三格式的读取器的第三凸块来公开制造磁头的方法。

10. 发明申请

US20090019335A1 AUXILIARY PATH ITERATIVE DECODING 有权
标题翻译：辅助路径迭代解码
公开(公告)号：US20090019335A1
公开(公告)日：2009-01-15
申请号：US11775748
申请日：2007-07-10
申请人： Keith G. Boyer , Jin Lu , Mark Hennecken
发明人： Keith G. Boyer , Jin Lu , Mark Hennecken
IPC分类号： H03M13/29
CPC分类号： H03M13/1105 , H03M13/47 , H03M13/6561
摘要： A parallel iterative decoding system interposed between a network interface and a block memory matrix receives encoded data and both stores the data in a First-In-First-Out (“FIFO”) memory block and processes it through a timing recovery engine. The timing recovery engine delivers to an iterative decoder synchronized data samples and detects cycle slip. The iterative decoder thereafter performs a predetermined number of iterations to decode the data. Responsive to encoded data failing to converge after the predetermined number of iterations, the encoded data is communicated from the FIFO memory to an auxiliary decoder module. The auxiliary iterative error correction code decoder performs a second predetermined number of iterations to decode the data wherein the number of iterations performed by the auxiliary iterative error correction code decoder is greater than the primary iterative error correction code decoder. Converged data from the auxiliary decoder replaces otherwise null data stored in the block matrix memory.
摘要翻译：插入在网络接口和块存储器矩阵之间的并行迭代解码系统接收编码数据，并将数据存储在先进先出（“FIFO”）存储器块中，并通过定时恢复引擎进行处理。定时恢复引擎提供迭代解码器同步数据采样并检测周期滑移。迭代解码器此后执行预定数量的迭代来解码数据。响应编码数据在预定次数的迭代之后不能收敛，编码数据从FIFO存储器传送到辅助解码器模块。辅助迭代纠错码解码器执行第二预定次数的迭代以解码其中由辅助迭代纠错码解码器执行的迭代次数大于主迭代纠错码解码器的数据。来自辅助解码器的汇聚数据替换存储在块矩阵存储器中的空数据。

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