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1. 发明授权

US06078444A Read channel auxiliary high precision data conversion 失效
标题翻译：读通道辅助高精度数据转换
公开(公告)号：US06078444A
公开(公告)日：2000-06-20
申请号：US634161
申请日：1996-04-18
申请人： G. Diwakar Vishakhadatta , David E. Reed , Jerrell P. Hein , G. Tyson Tuttle
发明人： G. Diwakar Vishakhadatta , David E. Reed , Jerrell P. Hein , G. Tyson Tuttle
IPC分类号： G11B5/012 , G11B5/09 , G11B5/55 , G11B5/58 , G11B5/596 , G11B19/28 , G11B20/10 , G11B20/12 , G11B20/14 , G11B5/00 , H03M1/12
CPC分类号： G11B5/012 , G11B19/28 , G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/1403 , G11B5/09 , G11B5/5526 , G11B5/553 , G11B5/5547 , G11B5/58 , G11B5/59605 , G11B5/59622 , G11B5/59633 , G11B5/59688 , G11B20/1258 , G11B5/5534 , G11B5/5965
摘要： A circuit is provided for use with analog to digital conversion techniques in sampled amplitude read channel integrated circuits. A common ADC may be utilized for conversion of both high frequency disk data such as user data and servo data, for example, and for low frequency auxiliary data such as, for example, motor back-EMF current signals. The ADC may utilize the relatively low bit accuracy required for the read channel disk data and through oversampling techniques obtain sufficient conversion accuracy to meet the relatively higher precision requirements for the auxiliary data conversion. The auxiliary data is modified by a ramp signal and the ADC is run on a clock generated from a dithered frequency source so that ADC quantization errors may be randomized.
摘要翻译：在采样幅度读通道集成电路中提供用于模数转换技术的电路。例如，可以使用公共ADC来转换诸如用户数据和伺服数据的高频盘数据，以及用于低频辅助数据，例如电动机反电动势电流信号。 ADC可以利用读通道盘数据所需的相对较低的位精度，并且通过过采样技术获得足够的转换精度以满足对辅助数据转换的相对较高的精度要求。辅助数据由斜坡信号修改，ADC在从抖动频率源产生的时钟上运行，因此ADC量化误差可以随机化。

2. 发明授权

US6028728A Sampled amplitude read/write channel employing a sub-baud rate write clock 失效
标题翻译：采用子波特率写入时钟的采样幅度读/写通道
公开(公告)号：US6028728A
公开(公告)日：2000-02-22
申请号：US7082
申请日：1998-01-14
申请人： David E. Reed
发明人： David E. Reed
IPC分类号： G11B5/012 , G11B20/10 , G11B20/14 , G11B5/09
CPC分类号： G11B20/10037 , G11B20/10009 , G11B20/1426 , G11B5/012
摘要： A sub-baud rate write circuit is disclosed which writes RLL encoded channel data to a disk storage medium using a write clock frequency significantly below the baud rate. This allows for a higher channel data rate without increasing the cost and complexity of the write circuitry. The write circuitry operates by re-encoding the RLL encoded channel data according to a particular mapping to generate write data at the write clock rate, and then writing the write data to the disk at appropriate phase delays. The phase delays are generated by passing the write clock through an array of delay circuits. The resulting write signal is the same as if the RLL encoded data were written to the disk using a baud rate write clock. The write circuitry of the present invention is ideally suited for use in a sub-sampled read/write channel where the object is to reduce the cost and complexity by clocking the entire channel at a frequency significantly below the baud rate.
摘要翻译：公开了一种子波特率写入电路，其使用明显低于波特率的写入时钟频率将RLL编码的信道数据写入到磁盘存储介质。这允许更高的信道数据速率，而不增加写入电路的成本和复杂性。写电路通过根据特定映射对RLL编码的信道数据进行重新编码，以写入时钟速率生成写入数据，然后以适当的相位延迟将写入数据写入到盘来进行操作。通过将写入时钟通过延迟电路阵列来产生相位延迟。所产生的写入信号与使用波特率写入时钟将RLL编码数据写入磁盘的写入信号相同。本发明的写入电路理想地适用于子采样读/写通道，其中目的是通过以大大低于波特率的频率对整个通道进行定时来降低成本和复杂性。

3. 发明授权

US5862161A Sampled amplitude read channel with simplified sequence detector matched to partial erasure 失效
标题翻译：采样幅度读通道与简化的序列检测器匹配部分擦除
公开(公告)号：US5862161A
公开(公告)日：1999-01-19
申请号：US697694
申请日：1996-08-28
申请人： David E. Reed , Richard T. Behrens
发明人： David E. Reed , Richard T. Behrens
IPC分类号： G06F11/00 , H03M13/00
CPC分类号： H03M13/6343 , G11B20/10277 , H03M13/41 , H03M5/145 , G11B20/10064 , G11B20/10074 , G11B20/10175 , G11B20/1426 , G11B2220/2516
摘要： This invention provides apparatus for reliably and efficiently reading data from a magnetic storage medium under the condition that adjacent magnetization regions are partially erased. A simplified nonlinear description of a read signal resulting from such partially erased magnetization regions is used to derive a state machine model of the read signal. The state machine model implicitly defines a sequence detector for demodulating recorded data from received samples. For a PR4 signal, the state machine has ten states; for an EPR4 signal, the state machine has eighteen states; and for an EEPR4 signal, the state machine has twenty-six states. The PR4 machine is further simplified using squaring and state sharing to provide state machine models with six and four states.
摘要翻译：本发明提供了在相邻磁化区域被部分擦除的条件下可靠且有效地从磁存储介质读取数据的装置。使用由这种部分擦除的磁化区域产生的读取信号的简化的非线性描述来导出读取信号的状态机器模型。状态机模型隐含地定义用于解调来自接收样本的记录数据的序列检测器。对于PR4信号，状态机有十个状态; 对于EPR4信号，状态机有十八个状态; 对于EEPR4信号，状态机有二十六个状态。 PR4机器使用平方和状态共享进一步简化，以提供具有六个和四个状态的状态机模型。

4. 发明授权

US5726818A Magnetic disk sampled amplitude read channel employing interpolated timing recovery for synchronous detection of embedded servo data 失效
标题翻译：采用内插定时恢复的磁盘采样幅度读取通道，用于嵌入式伺服数据的同步检测
公开(公告)号：US5726818A
公开(公告)日：1998-03-10
申请号：US567681
申请日：1995-12-05
申请人： David E. Reed , William G. Bliss
发明人： David E. Reed , William G. Bliss
IPC分类号： G11B5/596 , G11B5/09 , G11B20/10 , G11B20/12 , G11B20/14 , G11B21/10 , H04L7/02
CPC分类号： H04L7/0029 , G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10064 , G11B20/10074 , G11B20/1403 , G11B5/09 , H04L7/0062 , G11B20/1258 , G11B2020/10888 , G11B2020/1234 , G11B2020/1282 , H04L2007/047 , H04L7/0004
摘要： A sampled amplitude read channel reads user data and embedded servo data stored on a magnetic medium by detecting digital data from a sequence of discrete time interpolated sample values. A write frequency synthesizer generates a write clock for writing digital data to the magnetic medium at a predetermined baud rate for a selected zone, and upon read back, a read frequency synthesizer generates a fixed sampling clock at a frequency slightly higher than the write frequency at the outer zone. A sampling device samples the analog read signal at this fixed sampling rate across the data zones and servo wedges to generate a sequence of discrete time channel samples that are not synchronized to the baud rate. Before sampling, an analog receive filter processes the read signal to attenuate aliasing noise without having to adjust its spectrum across data zones or servo wedges. A discrete time equalizing filter equalizes the channel samples according to a predetermined partial response (PR4, EPR4, EEPR4, etc.). An interpolating timing recovery circuit, responsive to the equalized channel samples, computes an interpolation interval .tau. and, in response thereto, generates interpolated sample values substantially synchronized to the baud rate. The timing recovery circuit also generates a synchronous data clock for clocking a discrete time sequence detector and pulse detector which detect the digital user and servo data from the interpolated sample values.
摘要翻译：采样幅度读取通道通过从离散时间内插样本值的序列中检测数字数据来读取存储在磁性介质上的用户数据和嵌入式伺服数据。写入频率合成器产生写入时钟，用于以预定波特率向所选择的区域向磁性介质写入数字数据，并且在读回时，读取频率合成器以略高于写入频率的频率产生固定采样时钟外部区域。采样设备以固定采样率对数据区和伺服楔进行采样，以产生不与波特率同步的离散时间通道采样序列。在采样之前，模拟接收滤波器处理读取信号以衰减混叠噪声，而不必在数据区或伺服楔上调整其频谱。离散时间均衡滤波器根据预定的部分响应（PR4，EPR4，EEPR4等）均衡信道样本。内插定时恢复电路响应于均衡信道采样，计算内插间隔τ，并且响应于此产生基本上与波特率同步的内插采样值。定时恢复电路还产生用于计时离散时间序列检测器和脉冲检测器的同步数据时钟，其从内插样本值检测数字用户和伺服数据。

5. 发明申请

US20100003414A1 Method for Spraying Trusses With a Mold and Insect Preventative Solution 审中-公开
标题翻译：用模具和昆虫预防措施喷洒桁架的方法
公开(公告)号：US20100003414A1
公开(公告)日：2010-01-07
申请号：US12465668
申请日：2009-05-14
申请人： Michael E. Reed , David E. Reed , Dale Collins
发明人： Michael E. Reed , David E. Reed , Dale Collins
IPC分类号： B05D7/06 , B05D5/00 , B05D3/00
CPC分类号： B05B14/40
摘要： A spray box assembly including, in combination, a top spray box, a bottom spray box, the boxes being juxtapositioned to define a pathway therebetween, at least one spray assembly positioned within at least one of the boxes and a supply assembly for supplying a treating solution to the spray assembly to coat product with the treating solution as the product is fed through the pathway and also including a method of coating a product with a treating solution, comprising the steps of feeding the product into a pathway between top spray box and a bottom spray box and spraying the treating solution within at least one of the boxes about the pathway to coat the product with the treating solution as the product is fed through the pathway.
摘要翻译：一种喷雾箱组件，其组合包括顶部喷雾箱，底部喷雾箱，所述盒并置以在其间限定通道，至少一个位于至少一个盒子内的喷洒组件和用于供应处理该溶液在产品通过该通道进料时，与处理溶液一起涂覆产品，还包括用处理溶液涂覆产品的方法，该方法包括以下步骤：将产物进料到顶部喷雾盒和底部喷雾箱，并且当处理溶液通过该通道进料时，将处理溶液喷洒在围绕通路的至少一个盒中，以用处理溶液涂覆产品。

6. 发明授权

US07534299B2 Method and apparatus for spraying trusses with a mold and insect preventative solution 失效
标题翻译：用模具和昆虫预防液喷射桁架的方法和装置
公开(公告)号：US07534299B2
公开(公告)日：2009-05-19
申请号：US11018517
申请日：2004-12-20
申请人： Michael E. Reed , David E. Reed , Dale Collins
发明人： Michael E. Reed , David E. Reed , Dale Collins
IPC分类号： B05B13/06 , B05B1/28
CPC分类号： B05B14/40 , Y02P70/36
摘要： A spray box assembly including, in combination, a top spray box, a bottom spray box, the boxes being juxtapositioned to define a pathway therebetween, at least one spray assembly positioned within at least one of the boxes and a supply assembly for supplying a treating solution to the spray assembly to coat product with the treating solution as the product is fed through the pathway and also including a method of coating a product with a treating solution, comprising the steps of feeding the product into a pathway between top spray box and a bottom spray box and spraying the treating solution within at least one of the boxes about the pathway to coat the product with the treating solution as the product is fed through the pathway.
摘要翻译：一种喷雾箱组件，其组合包括顶部喷雾箱，底部喷雾箱，所述盒并置以在其间限定通道，至少一个位于至少一个盒子内的喷洒组件和用于供应处理该溶液在产品通过该通道进料时，与处理溶液一起涂覆产品，还包括用处理溶液涂覆产品的方法，该方法包括以下步骤：将产物进料到顶部喷雾盒和底部喷雾箱，并且当处理溶液通过该通道进料时，将处理溶液喷洒在围绕通路的至少一个盒中，以用处理溶液涂覆产品。

7. 发明授权

US06614609B1 Gray code detection for a disk drive system 有权
标题翻译：格式代码检测磁盘驱动器系统
公开(公告)号：US06614609B1
公开(公告)日：2003-09-02
申请号：US09520535
申请日：2000-03-08
申请人： David E. Reed , Sian She
发明人： David E. Reed , Sian She
IPC分类号： G11B509
CPC分类号： G11B20/10009 , G11B5/59605 , G11B5/59688 , G11B27/3027 , G11B2220/20 , G11B2220/2516
摘要： A disk drive system is disclosed that includes a disk device coupled to control circuitry. The control circuitry includes a read channel with a detector that detects a bit sequence associated with Gray codes and delays indications of the bit sequence detection to handle phase shifts. The detector generates a Gray code detection signal in response to the delayed indications. The control circuitry processes the Gray code in response to the Gray code detection signal.
摘要翻译：公开了一种包括耦合到控制电路的盘装置的磁盘驱动器系统。控制电路包括具有检测器的读通道，其检测与格雷码相关联的比特序列并且延迟比特序列检测的指示以处理相移。检测器响应于延迟的指示产生格雷码检测信号。控制电路响应于格雷码检测信号处理格雷码。

8. 发明授权

US06549351B1 Auxiliary data encoding in a disk drive system 有权
标题翻译：磁盘驱动器系统中的辅助数据编码
公开(公告)号：US06549351B1
公开(公告)日：2003-04-15
申请号：US09338019
申请日：1999-06-22
申请人： David E. Reed
发明人： David E. Reed
IPC分类号： G11B509
CPC分类号： G06F3/0613 , G06F3/0632 , G06F3/0634 , G06F3/0674 , G11B5/012 , G11B5/09
摘要： A disk drive system comprises control circuitry and a disk device. The disk device transfers a read signal representing user data, servo data, and auxiliary data to the control circuitry. The control circuitry detects encoded signals representing “0” and “1” auxiliary data bits from the read signal. The control circuitry decodes the encoded signals into the auxiliary data bits. The encoded signals representing the “0” auxiliary data bits have opposite polarity from the encoded signals representing the “1” auxiliary data bits. Polarity reversal pulses are between consecutive encoded signals with opposite polarities. The auxiliary data bits could be repeatable run-out data that is processed to generate a position signal that the disk device uses to compensate for repeatable run-out error.
摘要翻译：磁盘驱动器系统包括控制电路和磁盘设备。磁盘设备将表示用户数据，伺服数据和辅助数据的读取信号传送到控制电路。控制电路从读取信号中检测表示“0”和“1”个辅助数据位的编码信号。控制电路将编码信号解码为辅助数据位。表示“0”辅助数据位的编码信号与表示“1”辅助数据位的编码信号具有相反的极性。极性反转脉冲在具有相反极性的连续编码信号之间。辅助数据位可以是可重复的耗尽数据，其被处理以产生磁盘设备用于补偿可重复的跳动误差的位置信号。

9. 发明授权

US06384747B1 Data encoding to provide run-length control in a data storage system 有权
标题翻译：在数据存储系统中提供运行长度控制的数据编码
公开(公告)号：US06384747B1
公开(公告)日：2002-05-07
申请号：US09694587
申请日：2000-10-23
申请人： David E. Reed , Jay N. Livingston , Marvin L. Vis
发明人： David E. Reed , Jay N. Livingston , Marvin L. Vis
IPC分类号： H03M746
CPC分类号： G06T9/005 , G11B20/1426 , H03M5/145 , H03M7/46 , H03M7/48
摘要： Data storage system circuitry comprises randomizer circuitry and run-length control circuitry. The randomizer circuitry generates randomized user data. The run-length control circuitry grades the randomized user data to determine if the randomized user data requires run-length encoding. The run-length control circuitry applies the run-length encoding to the randomized user data if the randomized user data requires run-length encoding. The run-length control circuitry may encode decoding information and error correction information for the decoding information into the randomized user data. The run-length encoding may comprise de-randomization or RLL encoding. If de-randomization is used, RLL encoding may be eliminated altogether for the randomized user data.
摘要翻译：数据存储系统电路包括随机化电路和游程长度控制电路。随机化电路产生随机用户数据。游程长度控制电路对随机用户数据进行分级，以确定随机用户数据是否需要运行长度编码。如果随机用户数据需要运行长度编码，则游程长度控制电路将游程长度编码应用于随机用户数据。游程长度控制电路可以将用于解码信息的解码信息和纠错信息编码为随机用户数据。游程长度编码可以包括去随机化或RLL编码。如果使用去随机化，对于随机用户数据可以完全消除RLL编码。

10. 发明授权

US6038091A Magnetic disk drive read channel with digital thermal asperity detector 失效
标题翻译：磁盘驱动器读取通道，带数字式热凹凸检测器
公开(公告)号：US6038091A
公开(公告)日：2000-03-14
申请号：US944224
申请日：1997-10-06
申请人： David E. Reed , William G. Bliss , German S. Feyh
发明人： David E. Reed , William G. Bliss , German S. Feyh
IPC分类号： G11B5/012 , G11B5/02 , G11B5/09 , G11B20/10 , G11B20/24 , G11B27/36 , G11B5/035 , G11B15/12
CPC分类号： G11B20/10203 , G11B20/10009 , G11B20/10037 , G11B20/24 , G11B27/36 , G11B5/012 , G11B5/09 , G11B5/6076
摘要： A thermal asperity-tolerant read channel is provided for a magnetic disk drive. Thermal asperities are detected by a digital detector which includes a pre-filter, a first threshold comparator and, optionally, a second threshold comparator. The pre-filter reduces noise and signal variation in the analog-to-digital converter output to enable better detection of a DC shift caused by a thermal asperity. The first threshold comparator compares the pre-filter output to a predetermined level; if the predetermined level is exceeded, the comparator output is set to one state, providing an initial indication of the presence of a thermal asperity. The optional second threshold comparator determines whether, out of a predetermined number of comparator outputs, the number in the one state exceeds programmed value; if so, the second threshold comparator outputs a final indication of the presence of a thermal asperity. In such a manner, accurate detection of thermal asperities is enhanced while reducing the likelihood of false detection. When a thermal asperity is detected, one or more of the following features can be activated to reduce the adverse effects of the thermal asperity: a squelch connected to the inputs of the variable gain amplifier; a loop-hold feature to maintain channel parameters such as timing, offset and gain until the effects of the thermal asperity have dissipated; and a user data erasure pointer to flag data which has been corrupted by the thermal asperity and which needs to be corrected by ECC circuitry.
摘要翻译：为磁盘驱动器提供耐热耐读读通道。数字检测器检测热不均匀性，数字检测器包括预滤波器，第一阈值比较器和可选地第二阈值比较器。预滤波器可减少模数转换器输出中的噪声和信号变化，从而更好地检测由热不均匀性引起的直流偏移。第一阈值比较器将预滤波器输出与预定电平进行比较; 如果超过预定电平，则将比较器输出设置为一个状态，提供存在热不均匀性的初始指示。可选的第二阈值比较器确定在预定数量的比较器输出中，一个状态中的数量是否超过编程值; 如果是，则第二阈值比较器输出存在热不均匀性的最终指示。以这种方式，提高了热粗糙度的精确检测，同时降低了错误检测的可能性。当检测到热粗糙度时，可以激活以下特征中的一个或多个以减少热凹凸的不利影响：连接到可变增益放大器的输入的静噪; 保持通道参数（例如定时，偏移和增益）的循环保持功能，直到散热的影响消散; 以及用户数据擦除指针，其标志数据已经被热不均匀性破坏并且需要由ECC电路校正。

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