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51.发明申请公开(公告)号：US20110090596A1
公开(公告)日：2011-04-21
申请号：US12589038
申请日：2009-10-16
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/315 , G11B5/3153
摘要： A structure for providing two write assist components for perpendicular thin film heads writing to high coercivity media is disclosed. The two components provided by the present invention include a media writing assist component and a head switching assist component. The structure includes an auxiliary half coil surrounding the pole tip at the ABS, and includes conductive elements running parallel to the pole layer which are connected to the auxiliary half coil. Integrated heat sinks located at either the ABS or at a recessed position are provided. The conductive elements can prove either symmetric or asymmetric current feed geometries, which allow differential or common mode current flow to the half coil.
摘要翻译： 公开了一种用于为垂直薄膜头写入高矫顽力介质的两个写入辅助部件的结构。 本发明提供的两个部件包括介质写入辅助部件和磁头切换辅助部件。 该结构包括在ABS处围绕极尖的辅助半线圈，并且包括与辅助半线圈连接的平行于极层延伸的导电元件。 提供位于ABS或凹陷位置的集成散热器。 导电元件可以证明对称或不对称的电流馈送几何形状，这允许差分或共模电流流向半线圈。
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52.发明申请Signaling method and apparatus for write assist of high coercivity media using integrated half coil 有权使用集成半线圈的高矫顽力介质的写辅助信号方法和装置公开(公告)号：US20110090584A1
公开(公告)日：2011-04-21
申请号：US12589042
申请日：2009-10-16
IPC分类号： G11B5/02
CPC分类号： G11B5/02 , G11B5/1278 , G11B5/3123 , G11B5/314 , G11B5/6005 , G11B5/6064 , G11B2005/0005
摘要： A signaling method and apparatus for providing two write assist components for perpendicular thin film heads writing to high coercivity media is disclosed. The two components provided by the present invention include a media writing assist component and a head switching assist component. Circuit wiring configurations and waveforms for driving an auxiliary half coil are disclosed. These include configurations for connecting the auxiliary half coil in parallel with the main data coil, or connecting the auxiliary half coil to the thermal flight control system. Provision for both common mode signals as well as differential mode signals are disclosed. RF sinusoidal waveforms between 1 and 5 GHz have been found suitable for head switching assist functions for either symmetric current feed and common mode current configuration, or asymmetric current feed and differential mode current configuration. RF sinusoidal waveforms between 10 and 50 GHz have been found suitable for media writing assist functions for either asymmetric or symmetric current feed and differential mode configuration. Data derived signals obtained by passing the data pulse train though high pass filtration has been found to provide both head switching assist and media writing assist functionality. Data derived signals can be used with or without the RF signals.
摘要翻译： 公开了一种用于为垂直薄膜头写入高矫顽力介质的两个写入辅助部件的信令方法和装置。 本发明提供的两个部件包括介质写入辅助部件和磁头切换辅助部件。 公开了用于驱动辅助半线圈的电路布线配置和波形。 这些包括用于将辅助半线圈与主数据线圈并联连接或将辅助半线圈连接到热飞行控制系统的配置。 公开了两种共模信号以及差模信号。 已经发现1到5GHz之间的RF正弦波形适用于对称电流馈电和共模电流配置的头部切换辅助功能，或非对称电流馈电和差分模式电流配置。 已经发现10到50GHz之间的RF正弦波形适用于非对称或对称电流馈送和差分模式配置的介质写入辅助功能。 已经发现通过高通滤波通过数据脉冲串获得的数据导出信号提供了头切换辅助和媒体写入辅助功能。 数据导出信号可以使用或不使用RF信号。
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公开(公告)号：US07830634B2
公开(公告)日：2010-11-09
申请号：US12343244
申请日：2008-12-23
CPC分类号： G11B27/36 , G11B5/6076 , G11B2220/2516
摘要： In a method of head-disk contact detection in a hard disk drive, a Radio Frequency (RF) carrier signal is injected into a slider which is flying above a surface of a disk in a hard disk drive. A modulated version of the RF carrier signal is received from the slider. The modulated version of the RF carrier signal is demodulated to achieve a demodulated signal. A signal spectrum of a range of frequencies in the demodulated signal is monitored for activity indicative of a contact between a head of the slider and the surface of the disk. An occurrence of the contact is determined based upon an occurrence of the activity.
摘要翻译： 在硬盘驱动器中的头盘接触检测的方法中，将射频（RF）载波信号注入到在硬盘驱动器中的盘表面上方飞行的滑块中。 从滑块接收RF载波信号的调制版本。 RF载波信号的调制版本被解调以实现解调信号。 监视解调信号中的频率范围的信号频谱，用于指示滑动头和盘的表面之间的接触的活动。 基于活动的发生来确定联系的发生。
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公开(公告)号：US20100240327A1
公开(公告)日：2010-09-23
申请号：US12675269
申请日：2008-08-22
CPC分类号： H01Q1/243 , H01Q21/0006 , H05K1/147
摘要： An antenna array can be mounted on a flexible substrate and connected by a flexible interconnect to an integrated circuit such as a radio frequency front end. The antenna array can be mounted in a device housing that includes radio frequency interference (RFI) shielding. The antenna array is aligned with and next to an area of the housing that is not shielded against RFI.
摘要翻译： 天线阵列可以安装在柔性基板上，并通过柔性互连连接到诸如射频前端的集成电路。 天线阵列可以安装在包括射频干扰（RFI）屏蔽的设备外壳中。 天线阵列与壳体的不被屏蔽RFI的区域对准并且紧邻RFI的区域。
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公开(公告)号：US07719786B1
公开(公告)日：2010-05-18
申请号：US12343039
申请日：2008-12-23
IPC分类号： G11B5/60
CPC分类号： G11B5/6029 , G11B5/6005 , G11B5/6064
摘要： In a method of actively controlling slider fly height, a modulated radio frequency (RF) carrier signal is received from a slider. The modulated RF carrier signal comprises an amplitude modulated component which is modulated onto the modulated RF carrier signal by vibration of the slider. The amplitude associated with the amplitude modulated component is measured. Thermal fly height control (TFC) voltage generation is controlled by feeding back on the amplitude. A TFC voltage to apply to the slider is generated such that a selected amplitude of the amplitude modulated component is achieved and maintained. The selected amplitude is associated with a particular preselected fly height of the slider above a surface of a disk. The TFC voltage is provided to the slider.
摘要翻译： 在主动控制滑块飞行高度的方法中，从滑块接收调制射频（RF）载波信号。 调制的RF载波信号包括通过滑块的振动被调制到经调制的RF载波信号的幅度调制分量。 测量与幅度调制分量相关联的振幅。 通过反馈振幅来控制热飞跃高度控制（TFC）电压产生。 产生应用于滑块的TFC电压，使得获得和维持调幅分量的选定振幅。 所选择的幅度与盘表面上方的滑块的特定预选飞行高度相关联。 TFC电压被提供给滑块。
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公开(公告)号：US07151810B2
公开(公告)日：2006-12-19
申请号：US10133227
申请日：2002-04-26
申请人： Luiz M. Franca-Neto
发明人： Luiz M. Franca-Neto
IPC分类号： H04L7/00
CPC分类号： H03K5/135 , H03K2005/00234 , H03K2005/00286 , H04L7/0045 , H04L7/0331
摘要： A clock signal is generated by receiving an input clock signal having an input clock signal frequency, dividing the input clock signal frequency by a selected number to produce a lower frequency output clock signal, and shifting the phase of the output clock signal. The phase can be shifted by changing, for at least a predetermined amount of time, the selected number by which the input clock signal frequency is divided, and then restoring the selected number to its original value. The clock can be used as a channel sampling clock, and it can be synchronized to the data by the phase shifting. One implementation uses a chain of flip-flops for dividing the frequency and additional circuitry for shifting phase. The flip-flops may be connected with minimum logic in order to operate at substantially the highest frequency reachable by a given transistor technology.
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公开(公告)号：US06707343B2
公开(公告)日：2004-03-16
申请号：US10438081
申请日：2003-05-14
申请人： Luiz M. Franca-Neto
发明人： Luiz M. Franca-Neto
IPC分类号： A03L718
CPC分类号： H03L7/23 , H03L7/0891 , H03L7/093 , H03L7/183
摘要： A frequency synthesizer, a multi-channel carrier generator, and a transceiver, as well as a method for generating a sub-carrier frequency are described.
摘要翻译： 描述了频率合成器，多信道载波发生器和收发器，以及用于产生副载波频率的方法。
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公开(公告)号：US06608529B2
公开(公告)日：2003-08-19
申请号：US09918987
申请日：2001-07-31
申请人： Luiz M. Franca-Neto
发明人： Luiz M. Franca-Neto
IPC分类号： H03L700
摘要： A frequency synthesizer, a multi-channel carrier generator, and a transceiver, as well as a method for generating a sub-carrier frequency are described. The frequency synthesizer includes two directly-connected, sequential chains of flip-flops, the first chain having N flip-flops, and the second chain having M flip-flops. The first chain of N flip-flops is clocked by a reference frequency input. Each chain provides a clocked output to an optional duty-cycle recovery circuit, which is in turn coupled to a frequency-update module. There is a sub-threshold low-pass filter included in the frequency-update module which feeds into an oscillator, providing, in turn, the generated frequency as an input to the second chain of M flip-flops, and a sub-carrier frequency output.
摘要翻译： 描述了频率合成器，多信道载波发生器和收发器，以及用于产生副载波频率的方法。 频率合成器包括两个直接连接的顺序的触发器链，第一链具有N个触发器，第二链具有M个触发器。 N个触发器的第一个链由参考频率输入提供时钟。 每个链条向可选的占空比恢复电路提供时钟输出，该电路又耦合到频率更新模块。 包括在频率更新模块中的子阈值低通滤波器，其馈送到振荡器中，从而将产生的频率提供给M个触发器的第二链的输入，并且子载波频率 输出。
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