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1. 发明授权

US07742255B2 Head-disc interface (HDI) modal response monitoring 有权
标题翻译：头盘接口（HDI）模态响应监控
公开(公告)号：US07742255B2
公开(公告)日：2010-06-22
申请号：US11776206
申请日：2007-07-11
申请人： Antanas Daugela , Subra Nagarajan , Jason W. Riddering , Neal F. Gunderson , John S. Wright , Stefan A. Ionescu , Rick P. Freeman , Erick J. Lindquist , Andrew R. Motzko , Zine Eddine Boutaghou
发明人： Antanas Daugela , Subra Nagarajan , Jason W. Riddering , Neal F. Gunderson , John S. Wright , Stefan A. Ionescu , Rick P. Freeman , Erick J. Lindquist , Andrew R. Motzko , Zine Eddine Boutaghou
IPC分类号： G11B5/596
CPC分类号： G11B5/6064 , G11B5/6058 , G11B5/607
摘要： Apparatus and method for head-disc interface (HDI) modal response monitoring. A sensing element disposed on a rigid actuator arm is mechanically impedance matched to a head-disc interface (HDI) supported by the actuator arm to resonate at a predetermined frequency corresponding to at least one disturbance associated with the HDI.
摘要翻译：头盘接口（HDI）模态响应监测的装置和方法。设置在刚性致动器臂上的感测元件与由致动器臂支撑的头盘接口（HDI）机械阻抗匹配，以对应于与HDI相关联的至少一个干扰的预定频率谐振。

2. 发明申请

US20090015962A1 HEAD-DISC INTERFACE (HDI) MODAL RESPONSE MONITORING 有权
标题翻译： HEAD-DISC接口（HDI）模态响应监控
公开(公告)号：US20090015962A1
公开(公告)日：2009-01-15
申请号：US11776206
申请日：2007-07-11
申请人： ANTANAS DAUGELA , Subra Nagarajan , Jason W. Riddering , Neal F. Gunderson , John S. Wright , Stefan A. Ionescu , Rick P. Freeman , Erik J. Lindquist , Andrew R. Motzko , Zine Eddine Boutaghou
发明人： ANTANAS DAUGELA , Subra Nagarajan , Jason W. Riddering , Neal F. Gunderson , John S. Wright , Stefan A. Ionescu , Rick P. Freeman , Erik J. Lindquist , Andrew R. Motzko , Zine Eddine Boutaghou
IPC分类号： G11B5/55
CPC分类号： G11B5/6064 , G11B5/6058 , G11B5/607
摘要： Apparatus and method for head-disc interface (HDI) modal response monitoring. A sensing element disposed on a rigid actuator arm is mechanically impedance matched to a head-disc interface (HDI) supported by the actuator arm to resonate at a predetermined frequency corresponding to at least one disturbance associated with the HDI.
摘要翻译：头盘接口（HDI）模态响应监测的装置和方法。设置在刚性致动器臂上的感测元件与由致动器臂支撑的头盘接口（HDI）机械阻抗匹配，以对应于与HDI相关联的至少一个干扰的预定频率谐振。

3. 发明授权

US06301068B1 Programmable write current waveform for high frequency magnetic recording 失效
标题翻译：用于高频磁记录的可编程写入电流波形
公开(公告)号：US06301068B1
公开(公告)日：2001-10-09
申请号：US09346481
申请日：1999-07-01
申请人： Stefan A. Ionescu
发明人： Stefan A. Ionescu
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/035 , G11B5/09 , G11B2005/0013
摘要： A method of writing data to a magnetic data storage medium is provided. A peak amount of write current is provided to the transducer, after which the amount of write current is reduced to a second amount of write current, lower than the peak amount. In one embodiment, the second amount of write current is then maintained at a steady state value. In one embodiment, the magnitude of the steady state value is greater than the magnitude of the critical current. In one embodiment the magnitude and duration of the peak write current for each transducer are stored in memory and retrieved when the corresponding transducer is selected. Also provided is a disc drive adapted to implement the aforementioned methods.
摘要翻译：提供了将数据写入磁数据存储介质的方法。写入电流的峰值量被提供给换能器，之后写入电流量减少到低于峰值的第二写入电流量。在一个实施例中，然后将第二写入电流量保持在稳定状态值。在一个实施例中，稳态值的大小大于临界电流的大小。在一个实施例中，每个换能器的峰值写入电流的幅度和持续时间被存储在存储器中并且当选择相应的换能器时被检索。还提供了适于实现上述方法的盘驱动器。

4. 发明申请

US20090002883A1 Wire-assisted magnetic write device with phase shifted current 有权
标题翻译：具有相移电流的线辅助磁写装置
公开(公告)号：US20090002883A1
公开(公告)日：2009-01-01
申请号：US11823432
申请日：2007-06-27
申请人： Stefan A. Ionescu , Ladislav R. Pust , Michael T. Johnson , Nurul Amin
发明人： Stefan A. Ionescu , Ladislav R. Pust , Michael T. Johnson , Nurul Amin
IPC分类号： G11B15/10 , G11B5/02 , G11B5/127 , G11B5/17
CPC分类号： G11B5/1278 , G11B5/02 , G11B5/3123 , G11B5/3133 , G11B2005/0002
摘要： A magnetic device includes a write element having a write element tip and a conductive coil for carrying a current to induce a first field from the write element. A conductor proximate the write element tip carries the current to generate a second field that augments the first field. A driver provides the current to the conductive coil and the conductor, and a circuit phase shifts the current through the conductor relative to the current through the conductive coil.
摘要翻译：磁性装置包括具有写入元件尖端和用于承载电流以从写入元件引起第一场的导电线圈的写入元件。靠近写入元件尖端的导体承载电流以产生增加第一场的第二场。驱动器向导电线圈和导体提供电流，并且电路相对于通过导电线圈的电流使电流通过导体。

5. 发明授权

US08098455B2 Wire-assisted magnetic write device with phase shifted current 有权
标题翻译：具有相移电流的线辅助磁写装置
公开(公告)号：US08098455B2
公开(公告)日：2012-01-17
申请号：US11823432
申请日：2007-06-27
申请人： Stefan A. Ionescu , Ladislav R. Pust , Michael T. Johnson , Nurul Amin
发明人： Stefan A. Ionescu , Ladislav R. Pust , Michael T. Johnson , Nurul Amin
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/02 , G11B5/3123 , G11B5/3133 , G11B2005/0002
摘要： A magnetic device includes a write element having a write element tip and a conductive coil for carrying a current to induce a first field from the write element. A conductor proximate the write element tip carries the current to generate a second field that augments the first field. A driver provides the current to the conductive coil and the conductor, and a circuit phase shifts the current through the conductor relative to the current through the conductive coil.
摘要翻译：磁性装置包括具有写入元件尖端和用于承载电流以从写入元件引起第一场的导电线圈的写入元件。靠近写入元件尖端的导体承载电流以产生增加第一场的第二场。驱动器向导电线圈和导体提供电流，并且电路相对于通过导电线圈的电流使电流通过导体。

6. 发明授权

US06304403B1 Multiple devices selected fault feature for data integrity in disc drive applications 失效
标题翻译：多个设备选择故障功能，用于磁盘驱动器应用中的数据完整性
公开(公告)号：US06304403B1
公开(公告)日：2001-10-16
申请号：US09345890
申请日：1999-07-01
申请人： Stefan A. Ionescu
发明人： Stefan A. Ionescu
IPC分类号： G11B502
CPC分类号： G11B27/36 , G11B5/012 , G11B5/09 , G11B19/04 , G11B20/1833 , G11B2220/20
摘要： A read/write preamplifier circuit is provided that includes a fault detecting circuit that detects when two or more read/write preamplifiers are concurrently selected for communicating with their associated data heads and means for notifying the drive controller of that condition. In one embodiment of the invention, the means for notifying the drive controller that two or more preamplifiers are concurrently selected includes a data storage register that is readable by the drive controller and that has a fault flag which is set when two or more preamplifiers are concurrently selected. Also, in one embodiment, the fault detecting circuit includes a fault-detect transistor that drives a predetermined current if the preamplifier is elected. The collectors of the fault-detect transistors of each preamplifier are electronically coupled to each other and to a sensing circuit that senses if the fault-detect transistors of two or more preamplifiers are concurrently driving the predetermined current. In addition, a disc drive which includes such a preamplifier circuit is provided.
摘要翻译：提供了一种读/写前置放大器电路，其包括检测何时同时选择两个或多个读/写前置放大器与其相关联的数据头进行通信的故障检测电路，以及用于通知驱动控制器该情况的装置。在本发明的一个实施例中，用于通知驱动控制器的两个或更多个前置放大器同时被选择的装置包括一个数据存储寄存器，该数据存储寄存器可由驱动器控制器读取并且具有当两个或多个前置放大器同时被设置时设置的故障标志选择。此外，在一个实施例中，故障检测电路包括故障检测晶体管，如果选择前置放大器则驱动预定电流。每个前置放大器的故障检测晶体管的集电极彼此电耦合并且感测电路，其感测两个或多个前置放大器的故障检测晶体管是否同时驱动预定电流。此外，提供了包括这种前置放大器电路的盘驱动器。

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