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1. 发明授权

US08565048B1 Unipolar current driver 有权
标题翻译：单极电流驱动器
公开(公告)号：US08565048B1
公开(公告)日：2013-10-22
申请号：US13472448
申请日：2012-05-15
申请人： Ross S. Wilson , Jason P. Brenden , Xuemin Yang
发明人： Ross S. Wilson , Jason P. Brenden , Xuemin Yang
IPC分类号： G11B11/00 , H01S3/00
CPC分类号： G11B5/02 , G11B2005/0021 , H01S5/0427
摘要： Various embodiments of the present invention provide single-ended and differential current drivers for heat assisted magnetic recording and other applications. For example, a current driver is disclosed that includes an upper output terminal and lower output terminal, a number of current switches operable to selectively contribute electrical currents through the upper and lower output terminals, a control input for each of the current switches operable to control the electrical currents, and a voltage supply operable to establish a voltage across the upper and output terminals.
摘要翻译：本发明的各种实施例提供用于热辅助磁记录和其它应用的单端和差动电流驱动器。例如，公开了一种电流驱动器，其包括上部输出端子和下部输出端子，多个电流开关，其可操作以选择性地提供通过上部和下部输出端子的电流;每个电流开关的控制输入可操作以控制电流和可用于在上部和输出端子上建立电压的电压源。

2. 发明授权

US07692887B2 Method and apparatus for measuring resistance of a resistive sensor 有权
标题翻译：用于测量电阻式传感器电阻的方法和装置
公开(公告)号：US07692887B2
公开(公告)日：2010-04-06
申请号：US11520493
申请日：2006-09-13
申请人： Daniel J. Dolan, Jr. , Hao Fang , Jeffrey A. Gleason , Ross S. Wilson
发明人： Daniel J. Dolan, Jr. , Hao Fang , Jeffrey A. Gleason , Ross S. Wilson
IPC分类号： G11B27/36
CPC分类号： G11B5/455 , G11B2005/0016
摘要： An apparatus and method for determining a head parameter value (e.g., head resistance) of a resistive head. A test head current is supplied to the head during a head parameter measurement interval using the same current sources that supply a bias current to the head during an operating (read operation) interval. The determined head parameter value is latched for use in setting the control loop gain for a control loop that controls the current sources during the operating interval.
摘要翻译：一种用于确定电阻头的头部参数值（例如，头部电阻）的装置和方法。在头部参数测量间隔期间，使用在操作（读取操作）间隔期间向头部提供偏置电流的相同电流源向头部提供测试头电流。确定的头参数值被锁存用于设置在操作间隔期间控制电流源的控制回路的控制回路增益。

3. 发明申请

US20090322266A1 Systems and Methods for Controlling a DC Motor 有权
标题翻译：控制直流电机的系统和方法
公开(公告)号：US20090322266A1
公开(公告)日：2009-12-31
申请号：US12374304
申请日：2006-09-26
申请人： James A. Dahlberg , Ross S. Wilson , Jason P. Brenden
发明人： James A. Dahlberg , Ross S. Wilson , Jason P. Brenden
IPC分类号： H02P6/20
CPC分类号： H02P6/08 , H02P6/18 , H02P6/185 , H02P6/22 , H02P23/22
摘要： Various systems and methods for controlling DC motors are disclosed herein. For example, one method provides for controlling a polyphase, brushless DC motor. The method includes providing a DC motor that has a plurality of phases. Such a DC motor operates by inducing a current in the plurality of phases in accordance with a plurality of commutation states. In the example, six commutation states are discussed, but fewer than or more than six commutation states may exist. The method further includes initializing a count, inducing a current in the plurality of phases in accordance with a first commutation state, and incrementing the count until the current achieves a threshold in the first commutation state. Then, a current is induced in the plurality of phases in accordance with a second commutation state, and the count is decremented until the current achieves the threshold in the second commutation state. The sign bit of the count is stored, and a desired initial commutation state is determined based at least in part on the sign bit of the count.
摘要翻译：本文公开了用于控制DC电动机的各种系统和方法。例如，一种方法用于控制多相无刷直流电动机。该方法包括提供具有多个相位的DC电动机。这样的直流电动机通过根据多个换向状态感应多相中的电流来进行工作。在该示例中，讨论了六个换向状态，但是可能存在少于或多于六个换向状态。该方法还包括初始化计数，根据第一换向状态诱发多个相位中的电流，并且增加计数直到电流达到第一换向状态的阈值。然后，根据第二换向状态在多相中感应出电流，并且减少计数直到电流在第二换向状态下达到阈值。存储计数的符号位，并且至少部分地基于计数的符号位来确定期望的初始换向状态。

4. 发明申请

US20080062551A1 Method and apparatus for measuring resistance of a resistive sensor 有权
标题翻译：用于测量电阻式传感器电阻的方法和装置
公开(公告)号：US20080062551A1
公开(公告)日：2008-03-13
申请号：US11520493
申请日：2006-09-13
申请人： Daniel J. Dolan , Hao Fang , Jeffrey A. Gleason , Ross S. Wilson
发明人： Daniel J. Dolan , Hao Fang , Jeffrey A. Gleason , Ross S. Wilson
IPC分类号： G11B27/36 , G11B5/03
CPC分类号： G11B5/455 , G11B2005/0016
摘要： An apparatus and method for determining a head parameter value (e.g., head resistance) of a resistive head. A test head current is supplied to the head during a head parameter measurement interval using the same current sources that supply a bias current to the head during an operating (read operation) interval. The determined head parameter value is latched for use in setting the control loop gain for a control loop that controls the current sources during the operating interval.
摘要翻译：一种用于确定电阻头的头部参数值（例如，头部电阻）的装置和方法。在头部参数测量间隔期间，使用在操作（读取操作）间隔期间向头部提供偏置电流的相同电流源向头部提供测试头电流。确定的头参数值被锁存用于设置在操作间隔期间控制电流源的控制回路的控制回路增益。

5. 发明授权

US08565047B2 Systems and methods for data write loopback based timing control 有权
标题翻译：基于数据写环回的时序控制系统和方法
公开(公告)号：US08565047B2
公开(公告)日：2013-10-22
申请号：US13096873
申请日：2011-04-28
申请人： Ross S. Wilson
发明人： Ross S. Wilson
IPC分类号： G11B11/00 , G11B5/02
CPC分类号： G11B13/04 , G11B5/02 , G11B20/10009 , G11B2005/0021
摘要： Various embodiments of the present invention provide systems and methods for data writing. As an example, a heat assisted loopback circuit is discussed that includes: a read circuit, a magnetic write circuit, a heat write circuit, and a loopback circuit. The read circuit is operable to sense data from a storage medium, and to provide the sensed data as a read output. The magnetic write circuit is operable to provide a write output corresponding to an excitation signal of a write head. The heat write circuit is operable to provide a heat output corresponding to an excitation signal of a heat source. The loopback circuit is operable to selectively couple a derivative of the heat output to the read output and to selectively couple a derivative of the write output to the read output.
摘要翻译：本发明的各种实施例提供了用于数据写入的系统和方法。作为示例，讨论了包括读取电路，磁性写入电路，加热写入电路和环回电路的热辅助回路电路。读取电路可操作以感测来自存储介质的数据，并将所感测的数据提供为读取输出。磁写入电路可操作以提供与写入头的激励信号相对应的写入输出。热写电路可操作以提供对应于热源的激励信号的热输出。环回电路可操作以选择性地将热输出的导数耦合到读输出并选择性地将写输出的导数耦合到读输出。

6. 发明申请

US20120275278A1 Systems and Methods for Data Write Loopback Based Timing Control 有权
标题翻译：基于数据写环回的时序控制系统与方法
公开(公告)号：US20120275278A1
公开(公告)日：2012-11-01
申请号：US13096873
申请日：2011-04-28
申请人： Ross S. Wilson
发明人： Ross S. Wilson
IPC分类号： G11B5/02 , G11B13/04
CPC分类号： G11B13/04 , G11B5/02 , G11B20/10009 , G11B2005/0021
摘要： Various embodiments of the present invention provide systems and methods for data writing. As an example, a heat assisted loopback circuit is discussed that includes: a read circuit, a magnetic write circuit, a heat write circuit, and a loopback circuit. The read circuit is operable to sense data from a storage medium, and to provide the sensed data as a read output. The magnetic write circuit is operable to provide a write output corresponding to an excitation signal of a write head. The heat write circuit is operable to provide a heat output corresponding to an excitation signal of a heat source. The loopback circuit is operable to selectively couple a derivative of the heat output to the read output and to selectively couple a derivative of the write output to the read output.
摘要翻译：本发明的各种实施例提供了用于数据写入的系统和方法。作为示例，讨论了包括读取电路，磁性写入电路，加热写入电路和环回电路的热辅助回路电路。读取电路可操作以感测来自存储介质的数据，并将所感测的数据提供为读取输出。磁写入电路可操作以提供与写入头的激励信号相对应的写入输出。热写电路可操作以提供对应于热源的激励信号的热输出。环回电路可操作以选择性地将热输出的导数耦合到读输出并选择性地将写输出的导数耦合到读输出。

7. 发明申请

US20120063025A1 HIGH SPEED WRITER 有权
标题翻译：高速写入
公开(公告)号：US20120063025A1
公开(公告)日：2012-03-15
申请号：US12880463
申请日：2010-09-13
申请人： Ross S. Wilson
发明人： Ross S. Wilson
IPC分类号： G11B5/02
CPC分类号： G11B5/09 , G11B5/012
摘要： An apparatus comprising a control circuit, a driver circuit and a write head. The control circuit may be configured to generate a plurality of control signals in response to a data input signal. The driver circuit may be configured to generate a differential write control signal in response to the plurality of control signals. The driver circuit may receive the plurality of control signals through a flexible bus. The driver circuit may be located remotely from the control circuit. The write head may be configured to write information by physically moving above one of a plurality of tracks on a disk in response to the write control signal. The driver circuit may be configured to move along with the write head.
摘要翻译：一种包括控制电路，驱动电路和写头的装置。控制电路可以被配置为响应于数据输入信号而产生多个控制信号。驱动器电路可以被配置为响应于多个控制信号而产生差分写入控制信号。驱动器电路可以通过柔性总线接收多个控制信号。驱动器电路可以远离控制电路。写头可以被配置为响应于写入控制信号在盘上的多个磁道上的物理上移动来写入信息。驱动器电路可以被配置为与写入头一起移动。

8. 发明授权

US07085089B2 System and method for reducing circumferential transition incoherence in servowriting operations and magnetic disk drive incorporating the same 有权
标题翻译：用于减少伺服驱动操作中的圆周过渡不连续性的系统和方法以及包含其的磁盘驱动器的系统和方法
公开(公告)号：US07085089B2
公开(公告)日：2006-08-01
申请号：US10404828
申请日：2003-04-01
申请人： Ross S. Wilson
发明人： Ross S. Wilson
IPC分类号： G11B5/02 , G11B21/02
CPC分类号： G11B5/59633
摘要： For use with a servowriter that includes a writer core having a plurality of transistors that route servowriting current in response to a servo write signal, a write transition controller, a method of operating the same and a magnetic disk drive incorporating the controller or the method. In one embodiment, the controller includes: (1) logic circuitry, coupled to the writer core, that selectively blocks the servo write signal based on a state of a write current control signal and (2) current shunt circuitry, coupled to the writer core, that operates concurrently with the logic circuitry selectively to shunt current around the writer core based on the state.
摘要翻译：用于包括具有多个晶体管的写入器芯片的伺服驱动器，所述多个晶体管响应于伺服写入信号来布线伺服电流，写入转换控制器，其操作方法以及包含该控制器或该方法的磁盘驱动器。在一个实施例中，控制器包括：（1）耦合到写入器核心的逻辑电路，其基于写入电流控制信号的状态选择性地阻塞伺服写入信号，以及（2）耦合到写入器核心的电流分流电路，其与逻辑电路同时操作以选择性地基于状态来分流写入器核心周围的电流。

9. 发明申请

US20130128375A1 Magnetic Recording System With Multi-Level Write Current 审中-公开
标题翻译：具有多电平写入电流的磁记录系统
公开(公告)号：US20130128375A1
公开(公告)日：2013-05-23
申请号：US13302169
申请日：2011-11-22
申请人： Boris Livshitz , Ross S. Wilson , Jason S. Goldberg
发明人： Boris Livshitz , Ross S. Wilson , Jason S. Goldberg
IPC分类号： G11B5/09
CPC分类号： G11B5/02 , G11B5/012 , G11B5/09 , G11B20/10027 , G11B20/10222 , G11B2220/2516
摘要： Various embodiments of the present invention provide apparatuses, systems and methods for magnetic recording with a multi-level write current waveform. For example, an apparatus for magnetic recording with a multi-level write current waveform is disclosed that includes a pattern detection circuit operable to detect patterns in data to be written by the magnetic write head and to yield a pattern indicator signal, and a write driver operable to generate the multi-level write current waveform for the magnetic write head. At least one electrical characteristic of the multi-level write current waveform is based upon the patterns detected by the pattern detection circuit.
摘要翻译：本发明的各种实施例提供了具有多电平写入电流波形的磁记录的装置，系统和方法。例如，公开了一种具有多电平写入电流波形的磁记录装置，其包括：图案检测电路，用于检测由磁性写入头写入的数据中的图案，并产生图案指示符信号;以及写入驱动器可操作地产生用于磁写头的多电平写入电流波形。多电平写入电流波形的至少一个电特性基于由图案检测电路检测到的图案。

10. 发明授权

US07595951B2 Head-specific standby modes for disk drive preamplifiers and the like 有权
标题翻译：用于磁盘驱动器前置放大器的头专用待机模式等
公开(公告)号：US07595951B2
公开(公告)日：2009-09-29
申请号：US11445535
申请日：2006-06-02
申请人： Daniel J. Dolan , David W. Kelly , Stephen C. Kuehne , Nathan M. Rudd , Ross S. Wilson
发明人： Daniel J. Dolan , David W. Kelly , Stephen C. Kuehne , Nathan M. Rudd , Ross S. Wilson
IPC分类号： G11B15/12
CPC分类号： G11B5/09 , G11B5/012
摘要： A (e.g., hard-disk drive (HD)) system supports reader standby mode and/or writer standby mode. For reader standby mode, reader circuitry in the system's preamplifier is transitioned to a low-power mode during write operations. To provide quick transition from write mode to read mode, the reader circuitry is transitioned to pre-read mode before the end of the write operation. For writer standby mode, the preamplifier's writer circuitry is transitioned to a low-power mode during read operations. To provide quick transition from read mode to write mode, the writer circuitry is transitioned to a pre-write mode before the end of the read operation. The availability of a reader standby mode during write operations and a writer standby mode during read operations reduces power consumption as compared to HD systems that leave the reader circuitry in pre-read mode throughout each write operation and the writer circuitry in pre-write mode throughout each read operation.
摘要翻译： A（例如，硬盘驱动器（HD））系统支持读取器待机模式和/或写入器待机模式。对于读取器待机模式，系统前置放大器中的读取器电路在写入操作期间转换为低功耗模式。为了提供从写入模式到读取模式的快速转换，读写器电路在写操作结束之前转换到预读模式。对于写入器待机模式，在读取操作期间，前置放大器的写入器电路转换为低功耗模式。为了提供从读取模式到写入模式的快速转换，写操作器电路在读取操作结束之前转换到预写模式。在写入操作期间读写器待机模式和读取操作期间写入器待机模式的可用性与在整个写入操作期间使读取器电路处于预读取模式并且以写入前模式的写入器电路全部停止的HD系统相比，降低功耗每次读操作。

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