公开(公告)号：US08929013B1

公开(公告)日：2015-01-06

申请号：US14085816

申请日：2013-11-21

Applicant: LSI Corporation

Inventor： Angelo R. Mastrocola ,  David W. Kelly ,  Ross S. Wilson ,  Jason P. Brenden

IPC: G11B5/09 ,  G11B5/02

CPC classification number: G11B5/02 ,  G11B20/10222

Abstract: A storage system with pattern dependent write includes a magnetic write head, a magnetic storage medium, a read channel operable to process write data to be recorded on the magnetic storage medium by the magnetic write head, and a preamplifier operable to receive the write data and an associated clock from the read channel, to generate a pattern dependent write control signal based on a pattern in the write data and on the clock, and to set a write current level through the magnetic write head to a number of different current levels based on the pattern dependent write control signal.

Abstract translation: 具有图案相关写入的存储系统包括磁写头，磁存储介质，可操作以通过磁写头处理要记录在磁存储介质上的写数据的读通道，以及可用于接收写数据的前置放大器 来自读通道的相关时钟，基于写入数据和时钟中的模式产生与模式相关的写入控制信号，并且通过磁性写入头将写入电流电平设置为基于 模式相关的写入控制信号。

公开(公告)号：US08824085B2

公开(公告)日：2014-09-02

申请号：US13666243

申请日：2012-11-01

Applicant: LSI Corporation

Inventor： Ross S. Wilson ,  Jason P. Brenden ,  Toan V. Tran

IPC: G11B5/02

CPC classification number: G11B5/6088 ,  G11B5/314 ,  G11B2005/0021

Abstract: A heat-assisted magnetic recording system may include, but is not limited to: at least one magnetic recording read/write head; at least one laser diode configured to illuminate at least a portion of at least one magnetic recording medium; at least one laser power level sensor configured to detect a power level of the at least one laser diode; and a controller configured to modify one or more power level settings associated with the at least one laser diode in response to one or more output signals of the at least one laser power level sensor.

Abstract translation: 热辅助磁记录系统可以包括但不限于：至少一个磁记录读/写头; 至少一个激光二极管被配置为照亮至少一个磁记录介质的至少一部分; 至少一个激光功率电平传感器，被配置为检测所述至少一个激光二极管的功率电平; 以及控制器，被配置为响应于所述至少一个激光功率电平传感器的一个或多个输出信号来修改与所述至少一个激光二极管相关联的一个或多个功率电平设置。

公开(公告)号：US20140240870A1

公开(公告)日：2014-08-28

申请号：US14272603

申请日：2014-05-08

Applicant: LSI Corporation

Inventor： Brad A. Natzke ,  Cameron C. Rabe ,  Hong Jiang ,  Andrew P. Krebs ,  Jason P. Brenden

IPC: G11B5/60 ,  H03F3/45

CPC classification number: G11B5/6017 ,  G11B5/607 ,  G11B21/02 ,  G11B2005/0008 ,  G11B2005/0018 ,  H03F3/45071 ,  H03F3/4508 ,  H03F2203/45116 ,  H03F2203/45528

Abstract: Amplifier architectures are provided for current sensing applications. An amplifier includes a load device, an operational amplifier, a current source, and a bipolar transistor. The operational amplifier has a first input terminal connected to a first input node that receives an input current, and a second input terminal connected to a second input node that receives a reference voltage. The current source is connected to an output of the operational amplifier. The operational amplifier, the current source, and the bipolar transistor form a feedback loop that generates and maintains a bias voltage on the first input node based on the reference voltage applied to the second input node. The bipolar transistor amplifies the input current received on the first input node, and generates an amplified input current. The load device converts the amplified input current to an output voltage, wherein the output voltage is used to sense the input current.

Abstract translation: 为电流检测应用提供放大器架构。 放大器包括负载装置，运算放大器，电流源和双极晶体管。 运算放大器具有连接到接收输入电流的第一输入节点的第一输入端子和连接到接收参考电压的第二输入节点的第二输入端子。 电流源连接到运算放大器的输出端。 运算放大器，电流源和双极晶体管形成反馈回路，其基于施加到第二输入节点的参考电压产生并维持第一输入节点上的偏置电压。 双极晶体管放大在第一输入节点上接收的输入电流，并产生放大的输入电流。 负载装置将放大的输入电流转换为输出电压，其中输出电压用于感测输入电流。

公开(公告)号：US08760790B2

公开(公告)日：2014-06-24

申请号：US13674308

申请日：2012-11-12

Applicant: LSI Corporation

Inventor： Brad A. Natzke ,  Cameron C. Rabe ,  Hong Jiang ,  Andrew P. Krebs ,  Jason P. Brenden

IPC: G11B5/02

CPC classification number: G11B5/6017 ,  G11B5/607 ,  G11B21/02 ,  G11B2005/0008 ,  G11B2005/0018 ,  H03F3/45071 ,  H03F3/4508 ,  H03F2203/45116 ,  H03F2203/45528

Abstract: Amplifier architectures are provided for current sensing applications. An amplifier includes a load device, an operational amplifier, a current source, and a bipolar transistor. The operational amplifier has a first input terminal connected to a first input node that receives an input current, and a second input terminal connected to a second input node that receives a reference voltage. The current source is connected to an output of the operational amplifier. The operational amplifier, the current source, and the bipolar transistor form a feedback loop that generates and maintains a bias voltage on the first input node based on the reference voltage applied to the second input node. The bipolar transistor amplifies the input current received on the first input node, and generates an amplified input current. The load device converts the amplified input current to an output voltage, wherein the output voltage is used to sense the input current.

Abstract translation: 为电流检测应用提供放大器架构。 放大器包括负载装置，运算放大器，电流源和双极晶体管。 运算放大器具有连接到接收输入电流的第一输入节点的第一输入端子和连接到接收参考电压的第二输入节点的第二输入端子。 电流源连接到运算放大器的输出端。 运算放大器，电流源和双极晶体管形成反馈回路，其基于施加到第二输入节点的参考电压产生并维持第一输入节点上的偏置电压。 双极晶体管放大在第一输入节点上接收的输入电流，并产生放大的输入电流。 负载装置将放大的输入电流转换为输出电压，其中输出电压用于感测输入电流。

公开(公告)号：US20130235487A1

公开(公告)日：2013-09-12

申请号：US13674308

申请日：2012-11-12

Applicant: LSI CORPORATION

Inventor： Brad A. Natzke ,  Cameron C. Rabe ,  Hong Jiang ,  Andrew P. Krebs ,  Jason P. Brenden

IPC: G11B21/02 ,  H03F3/45

CPC classification number: G11B5/6017 ,  G11B5/607 ,  G11B21/02 ,  G11B2005/0008 ,  G11B2005/0018 ,  H03F3/45071 ,  H03F3/4508 ,  H03F2203/45116 ,  H03F2203/45528

Abstract: Amplifier architectures are provided for current sensing applications. An amplifier includes a load device, an operational amplifier, a current source, and a bipolar transistor. The operational amplifier has a first input terminal connected to a first input node that receives an input current, and a second input terminal connected to a second input node that receives a reference voltage. The current source is connected to an output of the operational amplifier. The operational amplifier, the current source, and the bipolar transistor form a feedback loop that generates and maintains a bias voltage on the first input node based on the reference voltage applied to the second input node. The bipolar transistor amplifies the input current received on the first input node, and generates an amplified input current. The load device converts the amplified input current to an output voltage, wherein the output voltage is used to sense the input current.

Abstract translation: 为电流检测应用提供放大器架构。 放大器包括负载装置，运算放大器，电流源和双极晶体管。 运算放大器具有连接到接收输入电流的第一输入节点的第一输入端子和连接到接收参考电压的第二输入节点的第二输入端子。 电流源连接到运算放大器的输出端。 运算放大器，电流源和双极晶体管形成反馈回路，其基于施加到第二输入节点的参考电压产生并维持第一输入节点上的偏置电压。 双极晶体管放大在第一输入节点上接收的输入电流，并产生放大的输入电流。 负载装置将放大的输入电流转换为输出电压，其中输出电压用于感测输入电流。

公开(公告)号：US08792197B1

公开(公告)日：2014-07-29

申请号：US14074325

申请日：2013-11-07

Applicant: LSI Corporation

Inventor： Ross S. Wilson ,  Jason P. Brenden ,  Paul Mazur ,  Cameron C. Rabe ,  Gang Chen

IPC: G11B5/09 ,  G11B5/02

CPC classification number: G11B5/02 ,  G11B5/022 ,  G11B20/10009

Abstract: A hard disk drive or other storage device comprises a storage medium, a write head, and control circuitry coupled to the write head. The control circuitry comprises a write driver configured to generate a write signal comprising write pulses responsive to write data, and a driver controller configured to adjust overshoot amplitudes of respective ones of the write pulses utilizing a segmented digital-to-analog converter. The overshoot amplitudes are adjusted by detecting patterns in the write data, decoding a first portion of a base overshoot value to identify a corresponding number of base overshoot segments, combining the base overshoot value and a differential overshoot value, decoding a first portion of the combined base overshoot and differential overshoot values to identify a corresponding number of enhanced overshoot segments, and selecting between the number of base overshoot segments and the number of enhanced overshoot segments responsive to detection of a particular pattern.

Abstract translation: 硬盘驱动器或其他存储设备包括存储介质，写入头和耦合到写入头的控制电路。 控制电路包括一个写入驱动器，该写入驱动器经配置以产​​生写入信号，该写入信号包括响应于写入数据的写入脉冲，以及驱动器控制器，配置为利用分段的数模转换器来调整相应写入脉冲的过冲幅度。 通过检测写入数据中的图形来调整过冲幅度，对基本过冲值的第一部分进行解码以识别相应数量的基极过冲段，组合基极过冲值和差分过冲值，对组合的第一部分进行解码 基极过冲和差分过冲值，以识别相应数量的增强过冲段，并且响应于特定模式的检测，在基极过冲段的数量和增强的过冲段之间进行选择。

公开(公告)号：US09099137B2

公开(公告)日：2015-08-04

申请号：US14272603

申请日：2014-05-08

Applicant: LSI Corporation

Inventor： Brad A. Natzke ,  Cameron C. Rabe ,  Hong Jiang ,  Andrew P. Krebs ,  Jason P. Brenden

IPC: G11B5/02 ,  G11B5/60 ,  G11B21/02 ,  H03F3/45 ,  G11B5/00

CPC classification number: G11B5/6017 ,  G11B5/607 ,  G11B21/02 ,  G11B2005/0008 ,  G11B2005/0018 ,  H03F3/45071 ,  H03F3/4508 ,  H03F2203/45116 ,  H03F2203/45528

Abstract: Amplifier architectures are provided for current sensing applications. An amplifier includes a load device, an operational amplifier, a current source, and a bipolar transistor. The operational amplifier has a first input terminal connected to a first input node that receives an input current, and a second input terminal connected to a second input node that receives a reference voltage. The current source is connected to an output of the operational amplifier. The operational amplifier, the current source, and the bipolar transistor form a feedback loop that generates and maintains a bias voltage on the first input node based on the reference voltage applied to the second input node. The bipolar transistor amplifies the input current received on the first input node, and generates an amplified input current. The load device converts the amplified input current to an output voltage, wherein the output voltage is used to sense the input current.

Abstract translation: 为电流检测应用提供放大器架构。 放大器包括负载装置，运算放大器，电流源和双极晶体管。 运算放大器具有连接到接收输入电流的第一输入节点的第一输入端子和连接到接收参考电压的第二输入节点的第二输入端子。 电流源连接到运算放大器的输出端。 运算放大器，电流源和双极晶体管形成反馈回路，其基于施加到第二输入节点的参考电压产生并维持第一输入节点上的偏置电压。 双极晶体管放大在第一输入节点上接收的输入电流，并产生放大的输入电流。 负载装置将放大的输入电流转换为输出电压，其中输出电压用于感测输入电流。

公开(公告)号：US20140119164A1

公开(公告)日：2014-05-01

申请号：US13666243

申请日：2012-11-01

Applicant: LSI CORPORATION

Inventor： Ross S. Wilson ,  Jason P. Brenden ,  Toan V. Tran

IPC: G11B11/00

CPC classification number: G11B5/6088 ,  G11B5/314 ,  G11B2005/0021

Abstract: A heat-assisted magnetic recording system may include, but is not limited to: at least one magnetic recording read/write head; at least one laser diode configured to illuminate at least a portion of at least one magnetic recording medium; at least one laser power level sensor configured to detect a power level of the at least one laser diode; and a controller configured to modify one or more power level settings associated with the at least one laser diode in response to one or more output signals of the at least one laser power level sensor.

Abstract translation: 热辅助磁记录系统可以包括但不限于：至少一个磁记录读/写头; 至少一个激光二极管被配置为照亮至少一个磁记录介质的至少一部分; 至少一个激光功率电平传感器，被配置为检测所述至少一个激光二极管的功率电平; 以及控制器，被配置为响应于所述至少一个激光功率电平传感器的一个或多个输出信号来修改与所述至少一个激光二极管相关联的一个或多个功率电平设置。