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

US09058827B1 Disk drive optimizing filters based on sensor signal and disturbance signal for adaptive feed-forward compensation 有权
标题翻译：基于传感器信号和干扰信号的磁盘驱动器优化滤波器进行自适应前馈补偿
公开(公告)号：US09058827B1
公开(公告)日：2015-06-16
申请号：US13927096
申请日：2013-06-25
申请人： Western Digital Technologies, Inc.
发明人： Kuang-Yang Tu , Wei Xi , Jianguo Zhou , Teddy T. Chen
IPC分类号： G11B5/596 , G11B5/58
CPC分类号： G11B5/59694
摘要： A disk drive is disclosed comprising a servo control system operable to actuate a head over a disk. A sensor signal is filtered with a first filter comprising a frequency response, and the filtered sensor signal is filtered to generate a compensated sensor signal. An error signal is filtered with a second filter comprising the frequency response, and an adaptation control signal is generated based on the compensated sensor signal and the filtered error signal. An adaptive filter is adapted in response to the adaptation control signal, wherein the adaptive filter filters the sensor signal to generate feed-forward compensation values. The feed-forward compensation values are applied to the servo control system to compensate for the disturbance. A disturbance signal that represents the disturbance is generated, and the frequency response of the first and second filters is optimized based on the sensor signal and the disturbance signal.
摘要翻译：公开了一种磁盘驱动器，其包括可操作以在盘上致动磁头的伺服控制系统。用包括频率响应的第一滤波器对传感器信号进行滤波，并且滤波的传感器信号被滤波以产生经补偿的传感器信号。用包括频率响应的第二滤波器对误差信号进行滤波，并且基于经补偿的传感器信号和滤波的误差信号产生自适应控制信号。自适应滤波器适应于自适应控制信号，其中自适应滤波器对传感器信号进行滤波以产生前馈补偿值。前馈补偿值被应用于伺服控制系统以补偿干扰。产生表示干扰的干扰信号，并且基于传感器信号和干扰信号来优化第一和第二滤波器的频率响应。

2. 发明授权

US09082419B1 Disk drive configuring power mode of disk drive relative to servo gate 有权
标题翻译：磁盘驱动器配置相对于伺服门的磁盘驱动器的电源模式
公开(公告)号：US09082419B1
公开(公告)日：2015-07-14
申请号：US12480576
申请日：2009-06-08
申请人： Steven R. Vasquez
发明人： Steven R. Vasquez
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , G11B5/59616 , G11B5/59644 , G11B2020/1281
摘要： A disk drive is disclosed comprising a head actuated over a disk having a plurality of tracks, wherein each track comprises a plurality of data sectors and a plurality of servo sectors. The disk drive further comprises control circuitry including a read channel. The control circuitry configures a power mode of the read channel into a no-op mode, and when the head approaches a servo sector, configures the power mode into a servo mode. After configuring the power mode into the servo mode, the control circuitry waits for a pre-servo gate period, and after the pre-servo gate period, enables a servo gate to read the servo sector. After reading the servo sector, the control circuitry disables the servo gate and waits for a post-servo gate period. After the post-servo gate period, the control circuitry configure the power mode into the no-op mode.
摘要翻译：公开了一种磁盘驱动器，其包括在具有多个磁道的盘上致动的磁头，其中每个磁道包括多个数据扇区和多个伺服扇区。磁盘驱动器还包括包括读取通道的控制电路。控制电路将读通道的电源模式配置为无操作模式，并且当磁头接近伺服扇区时，将电源模式配置为伺服模式。在将功率模式配置到伺服模式之后，控制电路等待预伺服门限周期，并且在伺服门限周期之后，使得伺服门读取伺服扇区。读取伺服扇区后，控制电路禁用伺服门并等待后伺服门限。在伺服后门限周期之后，控制电路将功率模式配置为无操作模式。

3. 发明授权

US09060420B2 Method of manufacturing a double sided flex circuit for a disk drive wherein a first side lead provides an etching mask for a second side lead 有权
标题翻译：制造用于盘驱动器的双面柔性电路的方法，其中第一侧引线为第二侧引线提供蚀刻掩模
公开(公告)号：US09060420B2
公开(公告)日：2015-06-16
申请号：US13118545
申请日：2011-05-30
申请人： Dennis W. Hogg
发明人： Dennis W. Hogg
IPC分类号： H05K3/06 , H05K3/10 , G11B5/48 , H05K3/00 , H05K3/04 , H05K3/18
CPC分类号： H05K3/0082 , G11B5/486 , H05K3/048 , H05K3/06 , H05K3/184 , H05K2201/0108 , H05K2201/09672 , H05K2203/0551 , Y10T29/49025 , Y10T29/49124 , Y10T29/49147 , Y10T29/49155 , Y10T29/49156 , Y10T29/49165
摘要： A method of manufacturing a flex circuit is disclosed for a disk drive comprising a disk, a head actuated radially over the disk, and control circuitry. The flex circuit is for electrically coupling the head to the control circuitry and comprises a substrate. An electrical coating applied to a first side of the substrate is etched to form a first electrical lead. The first side of the substrate is irradiated with radiation such that the first electrical lead masks the radiation from passing through the substrate to prevent curing of a photoresist applied to the second side of the substrate to form an uncured photoresist and a cured photoresist on the second side of the substrate. The uncured photoresist is removed from the second side of the substrate to form a groove, and the groove is filled with electrically conductive material to form the second electrical lead.
摘要翻译：公开了一种用于磁盘驱动器的磁盘驱动器的制造方法，所述磁盘驱动器包括盘，在盘上径向驱动的磁头和控制电路。柔性电路用于将磁头电耦合到控制电路并且包括基板。施加到基板的第一侧的电涂层被蚀刻以形成第一电引线。用辐射照射衬底的第一侧，使得第一电引线掩蔽穿过衬底的辐射，以防止施加到衬底的第二侧的光致抗蚀剂的固化，以形成未固化的光致抗蚀剂和在第二层上固化的光致抗蚀剂侧面。将未固化的光致抗蚀剂从衬底的第二侧移除以形成凹槽，并且用导电材料填充凹槽以形成第二电引线。

4. 发明授权

US08995081B2 Disk drive minimizing initial seek distance after load operation 有权
标题翻译：磁盘驱动器最小化加载操作后的初始寻找距离
公开(公告)号：US08995081B2
公开(公告)日：2015-03-31
申请号：US13872029
申请日：2013-04-26
申请人： Western Digital Technologies, Inc.
发明人： Aswartha Narayana , Orhan Beker
IPC分类号： G11B5/596 , G11B21/02 , G11B5/55
CPC分类号： G11B5/5547
摘要： A disk drive is disclosed comprising a disk comprising tracks defined by servo sectors, a head, and control circuitry comprising a servo control system operable to actuate the head over the disk in response to the servo sectors. The head is loaded over the disk during a load operation, and a radial velocity of the head is determined during the load operation. A target track is generated based on the determined radial velocity of the head, and the servo control system seeks the head to the target track.
摘要翻译：公开了一种磁盘驱动器，包括包括由伺服扇区定义的磁道的磁盘，磁头和包括伺服控制系统的控制电路，所述伺服控制系统可操作以响应于伺服扇区致动磁头。在加载操作期间，头被装载在盘上，并且在加载操作期间确定头的径向速度。基于确定的头部的径向速度产生目标轨道，并且伺服控制系统将头部寻找到目标轨迹。

5. 发明授权

US09053747B1 Disk drive calibrating failure threshold based on noise power effect on failure detection metric 有权
标题翻译：基于噪声功率影响故障检测度量的磁盘驱动器校准故障阈值
公开(公告)号：US09053747B1
公开(公告)日：2015-06-09
申请号：US13752758
申请日：2013-01-29
申请人： Western Digital Technologies, Inc.
发明人： Baoliang Zhang , Carl E. Barlow , Chun Sei Tsai
IPC分类号： G11B5/09 , G11B20/18
CPC分类号： G11B20/182
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks, wherein each track comprises a plurality of data sectors. A test pattern is written to at least one data sector in at least one track, and the test pattern is read from the disk to generate a noisy read signal comprising added noise. An estimated data sequence is detected from the noisy read signal, and an amplitude of the added noise is increased until a failure detection metric reaches a metric threshold. A failure threshold is generated based on the amplitude of the added noise when the failure detection metric reaches the metric threshold, and a failure condition of the disk drive is predicted based on the failure threshold.
摘要翻译：公开了一种盘驱动器，其包括在包括多个轨道的盘上致动的头，其中每个轨道包括多个数据扇区。将测试图案写入至少一个轨道中的至少一个数据扇区，并且从盘读取测试图案以产生包括附加噪声的噪声读取信号。从噪声读取信号检测估计的数据序列，并且增加噪声的幅度直到故障检测度量达到度量阈值。当故障检测度量达到度量阈值时，基于附加噪声的幅度产生故障阈值，并且基于故障阈值预测磁盘驱动器的故障状况。

6. 发明授权

US09052701B1 Disk drive measuring a resonance mode by injecting sinusoids into a servo control system 有权
标题翻译：磁盘驱动器通过将正弦曲线注入伺服控制系统来测量谐振模式
公开(公告)号：US09052701B1
公开(公告)日：2015-06-09
申请号：US13585679
申请日：2012-08-14
申请人： Qingwei Jia , Shuyu Cao , Guoxiao Guo , Jie Yu
发明人： Qingwei Jia , Shuyu Cao , Guoxiao Guo , Jie Yu
IPC分类号： G05B5/01
CPC分类号： G05B5/01 , G11B5/59611 , G11B5/59622 , H02P25/034
摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors recorded around the circumference of the disk at a servo sampling frequency, and a servo control system operable to actuate a head over the disk by generating a control signal applied to an actuator. A first sinusoid is injected into the servo control system and a first DC component (dc1) is measured in the control signal. A second sinusoid is injected into the servo control system and a second DC component (dc2) is measured in the control signal, wherein the second sinusoid comprises a phase offset from the first sinusoid. A resonance mode of the servo control system is measured based on dc1 and dc2.
摘要翻译：公开了一种磁盘驱动器，其包括盘，该盘包括以伺服采样频率记录在盘周围的伺服扇区所限定的多个伺服轨迹;以及伺服控制系统，可操作以通过产生施加的控制信号来驱动磁盘上的磁头到致动器。在伺服控制系统中注入第一个正弦曲线，并在控制信号中测量第一个直流分量（dc1）。将第二正弦波注入到伺服控制系统中，并且在控制信号中测量第二直流分量（dc2），其中第二正弦波包括与第一正弦波相位偏移。基于dc1和dc2测量伺服控制系统的谐振模式。

7. 发明授权

US09047919B1 Disk drive initializing servo read channel by reading data preceding servo preamble during access operation 有权
标题翻译：磁盘驱动器通过在访问操作期间读取伺服前导码之前的数据来初始化伺服读取通道
公开(公告)号：US09047919B1
公开(公告)日：2015-06-02
申请号：US13797953
申请日：2013-03-12
申请人： Western Digital Technologies, Inc.
发明人： Guoxiao Guo , Richard K. Wong , Davide Giovenzana , John W. Vanlaanen , Teik EE Yeo , Jie Yu
IPC分类号： G11B5/09 , G11B20/10 , G11B5/596
CPC分类号： G11B20/10222 , G11B5/59616
摘要： A disk drive is disclosed comprising a disk having a plurality of data tracks defined by servo sectors, where each data track comprises a plurality of data sectors, and each servo sector comprises a servo preamble and servo data. The disk drive further comprises a head comprising a read element and a write element, and a servo read channel comprising an analog front end and a timing recovery circuit. During an access operation, data preceding the servo preamble of a first servo sector in the first data track is read in order to initialize the analog front end of the servo read channel. At least part of the servo preamble is read to initialize the timing recovery circuit of the servo read channel, and at least part of the servo data of the servo sector is read using the timing recovery circuit.
摘要翻译：公开了一种磁盘驱动器，其包括具有由伺服扇区定义的多个数据磁道的磁盘，其中每个数据磁道包括多个数据扇区，并且每个伺服扇区包括伺服前导码和伺服数据。磁盘驱动器还包括包括读取元件和写入元件的头部，以及包括模拟前端和定时恢复电路的伺服读取通道。在访问操作期间，读取第一数据磁道中的第一伺服扇区的伺服前导码之前的数据，以初始化伺服读通道的模拟前端。读取伺服前置码的至少一部分以初始化伺服读取通道的定时恢复电路，并且使用定时恢复电路读取伺服扇区的伺服数据的至少一部分。

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