公开(公告)号：US20150077879A1

公开(公告)日：2015-03-19

申请号：US14489477

申请日：2014-09-18

Applicant: HGST Netherlands B.V.

Inventor： John Contreras ,  Joey Martin Poss ,  Rehan Ahmed Zakai

IPC: G11B20/10 ,  G11B5/48

CPC classification number: G11B5/486 ,  G11B5/484

Abstract: Disk drive embodiments with common lead connections in the slider, suspension, and preamplifier are described. The arm electronics IC includes a preamplifier with single-ended input from the set of signal traces that include a common signal return lead for the plurality of read transducers (readers) in the slider. Two embodiments of the preamps are described that include a single-ended design and a pseudo-single-ended design. Each embodiment supplies the required bias to each read transducer using an operational transconductance amplifier (OTA) that drives a variable current source connected to the transducer. The positive input to the OTA is a DC voltage with the AC signal from the transducer imposed on it. The negative input is a DC reference voltage. Various embodiments of the signal trace configuration on the suspension are described including a single and double layer embodiments.

Abstract translation: 描述了在滑块，悬架和前置放大器中具有公共引线连接的磁盘驱动器实施例。 臂电子IC包括具有来自该组信号迹线的单端输入的前置放大器，其包括用于滑块中的多个读换能器（读取器）的公共信号返回引线。 描述前置放大器的两个实施例，其包括单端设计和伪单端设计。 每个实施例使用驱动连接到换能器的可变电流源的运算跨导放大器（OTA）向每个读取换能器提供所需的偏置。 OTA的正输入是直流电压，其上施加有传感器的交流信号。 负输入为直流参考电压。 描述悬架上的信号迹线配置的各种实施例，其包括单层和双层实施例。

公开(公告)号：US08988829B1

公开(公告)日：2015-03-24

申请号：US14489477

申请日：2014-09-18

Applicant: HGST Netherlands B.V.

Inventor： John Contreras ,  Joey Martin Poss ,  Rehan Ahmed Zakai

IPC: G11B21/20 ,  G11B20/10 ,  G11B5/48

CPC classification number: G11B5/486 ,  G11B5/484

Abstract: Disk drive embodiments with common lead connections in the slider, suspension, and preamplifier are described. The arm electronics IC includes a preamplifier with single-ended input from the set of signal traces that include a common signal return lead for the plurality of read transducers (readers) in the slider. Two embodiments of the preamps are described that include a single-ended design and a pseudo-single-ended design. Each embodiment supplies the required bias to each read transducer using an operational transconductance amplifier (OTA) that drives a variable current source connected to the transducer. The positive input to the OTA is a DC voltage with the AC signal from the transducer imposed on it. The negative input is a DC reference voltage. Various embodiments of the signal trace configuration on the suspension are described including a single and double layer embodiments.

Abstract translation: 描述了在滑块，悬架和前置放大器中具有公共引线连接的磁盘驱动器实施例。 臂电子IC包括具有来自该组信号迹线的单端输入的前置放大器，其包括用于滑块中的多个读换能器（读取器）的公共信号返回引线。 描述前置放大器的两个实施例，其包括单端设计和伪单端设计。 每个实施例使用驱动连接到换能器的可变电流源的运算跨导放大器（OTA）向每个读取换能器提供所需的偏置。 OTA的正输入是直流电压，其上施加有传感器的交流信号。 负输入为直流参考电压。 描述悬架上的信号迹线配置的各种实施例，其包括单层和双层实施例。

公开(公告)号：US09165596B1

公开(公告)日：2015-10-20

申请号：US14656898

申请日：2015-03-13

Applicant: HGST Netherlands B.V.

Inventor： John Contreras ,  Nobumasa Nishiyama ,  Joey Martin Poss ,  Tuyen Van Trinh ,  Craig K. Yanagisawa ,  Yasunori Kubo

IPC: G11B5/09 ,  G11B5/02 ,  G11B20/10

CPC classification number: G11B20/10009 ,  G11B5/012 ,  G11B5/09

Abstract: A disk drive has multiple preamplifiers (preamps) connected to the system-on-a-chip (SOC) by a common transmission line with resistors between the preamps and the SOC. Each preamp includes a read resistor at the output of each read amplifier, and a write resistor at the input of each write driver. The resistors may be programmable resistors located in the preamps. The read resistors are at the source of the signal to the transmission line and the write resistors are at the termination of the signal from the transmission line. The read and write resistors provide impendence matching with the transmission line and the SOC when one of the preamps is selected as active, which enables the SOC to operate seamlessly with a common transmission line connected to all preamps.

Abstract translation: 磁盘驱动器具有通过具有前置放大器和SOC之间的电阻的公共传输线连接到片上系统（SOC）的多个前置放大器（前置放大器）。 每个前置放大器在每个读取放大器的输出端都有一个读取电阻，在每个写入驱动器的输入端都有一个写入电阻。 电阻器可以是位于前置放大器中的可编程电阻器。 读电阻位于传输线信号的源头​​，写电阻处于来自传输线的信号的终端。 读取和写入电阻器在前置放大器中的一个被选择为有效时，提供与传输线和SOC匹配的阻抗，这使得SOC能够与连接到所有前置放大器的公共传输线无缝地操作。

公开(公告)号：US09153248B1

公开(公告)日：2015-10-06

申请号：US14630720

申请日：2015-02-25

Applicant: HGST Netherlands B.V.

Inventor： John Contreras ,  Zhihao Li ,  Joey Martin Poss

IPC: G11B5/02

CPC classification number: G11B5/02 ,  G11B5/022

Abstract: A disk drive preamplifier (preamp) includes a write driver that has two pairs of programmable bypass current sources not connected to the write current source to compensate for the inherent magnetic asymmetry of the write head. One pair of the programmable bypass current sources provides a fixed bypass current in one direction. The other pair provides a fixed bypass current in the opposite direction. Prior to writing, only one of the pairs of bypass current sources is selected and programmed with the correct value of bypass current. When the write driver generates the positive and negative write current pulses during writing the selected bypass current sources provide a fixed offset to the amplitude of the write current pulses.

Abstract translation: 磁盘驱动器前置放大器（前置放大器）包括写入驱动器，其具有不连接到写入电流源的两对可编程旁路电流源，以补偿写入磁头的固有磁性不对称性。 一对可编程旁路电流源在一个方向提供固定的旁路电流。 另一对在相反方向提供固定的旁路电流。 在写入之前，只有一对旁路电流源被选择并用旁路电流的正确值编程。 当写入驱动器在写入期间产生正和负写入电流脉冲时，所选择的旁路电流源为写入电流脉冲的幅度提供固定偏移。

公开(公告)号：US08724244B1

公开(公告)日：2014-05-13

申请号：US13726207

申请日：2012-12-23

Applicant: HGST Netherlands B.V.

Inventor： Joey Martin Poss ,  Bijan Rafizadeh

IPC: G11B5/09

CPC classification number: G11B5/09 ,  G11B5/012 ,  G11B5/607

Abstract: Disk drives with preamp rotational parameter control (RPC) using standard digital serial interface lines to the preamp are described. The standard serial interface lines are used to generate a special signal pattern that does not follow the serial communication protocol. The special signal pattern is used to implement RPC when doing so will not interference with other signals, preferably in the read/write recovery gap between the data and the servo field in a standard track format. A value of a selected preamp parameter can be incremented or decremented by one LSB during the read/write gap time in each servo sector as the disk rotates. Embodiments of the invention allow fly-height and write driver parameters to be varied inside of a single disk revolution. Embodiments are described that include two or four parameters in the set, which allows for multiple updates of each parameter per revolution of the disk.

Abstract translation: 描述了使用前置放大器旋转参数控制（RPC）的磁盘驱动器，使用标准数字串行接口线到前置放大器。 标准串行接口线用于生成不遵循串行通信协议的特殊信号模式。 特殊信号模式用于实现RPC，这样做不会干扰其他信号，最好是以标准磁道格式在数据和伺服字段之间的读/写恢复间隙中。 在盘旋转时，在每个伺服扇区的读/写间隙时间期间，所选前置放大器参数的值可以递增或递减1 LSB。 本发明的实施例允许飞高和写入驱动器参数在单个盘旋转内变化。 描述了在集合中包括两个或四个参数的实施例，其允许每一个盘的每个参数的多个更新。