中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

19 records (took 0.019 seconds)

    Laser bias current control
    2.
    发明授权
    Laser bias current control 有权

    公开(公告)号：US09916850B1

    公开(公告)日：2018-03-13

    申请号：US15375368

    申请日：2016-12-12

    Applicant: Seagate Technology LLC

    Inventor： Alfredo Sam Chu ,  Robert Matousek ,  Todd Michael Lammers ,  Thomas Lee Schick ,  Wenzhong Zhu

    IPC: G11B5/02 ,  G11B5/00 ,  G11B7/1263

    CPC classification number: G11B5/012 ,  G11B5/314 ,  G11B2005/0021

    Abstract: A preamplifier circuit can include a control line dedicated to receive a control signal that corresponds to indicating a specific register of the preamplifier circuit, which can allow the preamplifier to switch between utilizing two or more registers to control a current output of the preamplifier circuit. The preamplifier circuit may also have a serial input to program multiple registers of the preamplifier circuit in a serial fashion. In some embodiments, the current output may be a laser bias current. The preamplifier may adjust an output current that drives a laser emitter based on a control signal indicating which specific registers controls the output current. Further, a controller, such as a system-on-chip controller, may selectively vary the control signal to affect the current output of the preamplifier circuit. These systems and methods may be particularly useful for lasers and heat-assisted magnetic recording (HAMR).

    Storage media asperity characterization
    3.
    发明授权
    Storage media asperity characterization 有权
    存储介质粗糙度表征

    公开(公告)号：US09335153B2

    公开(公告)日：2016-05-10

    申请号：US13627731

    申请日：2012-09-26

    Applicant: Seagate Technology LLC

    Inventor： Robert Matousek ,  Kevin David Powers ,  Dale Thomas Riley

    IPC: G01B7/34 ,  G11B27/36 ,  G11B5/60

    CPC classification number: G01B7/34 ,  G11B5/607 ,  G11B5/6076 ,  G11B27/36

    Abstract: The present application discloses detecting an asperity on a storage media surface using two amplitude threshold crossings of an asperity detection signal within a preset timing window. The present application further discloses a temperature-dependent resistive asperity sensor and a preamplifier that correlates a resistance change at the asperity sensor within a preset timing window to detect an asperity on a storage media surface. The asperity may be one or both of a void in the storage media surface and a protrusion from the storage media surface.

    Abstract translation: 本申请公开了使用预设定时窗口内的粗糙度检测信号的两个振幅阈值交叉来检测存储介质表面上的粗糙度。 本申请还公开了一种温度依赖性电阻粗糙度传感器和一个前置放大器，其将预定定时窗口内的凹凸传感器的电阻变化相关联，以检测存储介质表面上的粗糙度。 凹凸可以是存储介质表面中的空隙和来自存储介质表面的突起中的一个或两个。

    Multiple virtual preamps in a single die
    7.
    发明授权
    Multiple virtual preamps in a single die 有权

    公开(公告)号：US09607632B1

    公开(公告)日：2017-03-28

    申请号：US15044726

    申请日：2016-02-16

    Applicant: Seagate Technology LLC

    Inventor： Robert Matousek ,  Thomas Lee Schick ,  Jon David Trantham

    IPC: G11B5/09

    CPC classification number: G11B5/09 ,  G11B5/4886 ,  G11B20/10027

    Abstract: Methods, apparatuses, and systems for allowing a single-die preamp to act as two or more virtual preamps for reading or writing data through multiple heads or elements concurrently. A selection register of a preamplifier is set to enable access to a primary register map. Values of registers in the primary register map are set to program a primary preamp channel for performing read or write operations to a first head. The selection register is then set to enable access to a secondary register map, and values of registers in the secondary register map are set to program a secondary preamp channel for performing read or write operations to a second head. Read or write operations can be performed to the first head through the primary preamp channel at a same time that read or write operations are performed to the second head through the second preamp channel.

    Individually programmable preamplifier
    10.
    发明授权
    Individually programmable preamplifier 有权

    公开(公告)号：US10164592B1

    公开(公告)日：2018-12-25

    申请号：US14833883

    申请日：2015-08-24

    Applicant: Seagate Technology LLC

    Inventor： Robert Matousek ,  Todd Michael Lammers ,  Thomas Lee Schick

    IPC: H03F3/68 ,  G11B5/09 ,  G11B5/012 ,  G11B20/10

    Abstract: A preamplifier may have a freeze bit that when set, puts the preamplifier in a static state, which prevents the preamplifier from implementing subsequent programming commands. The freeze state may continue until an unfreeze bit is programmed. In a multiple preamplifier system, preamplifiers can be differently and individually configured over a single interface. Preamplifiers may be released from the static state (frozen) by either programming the unfreeze bit (which can release all of the preamps) or by programming the freeze bit to a “0” state (releases the individual preamp). An inversion control circuit can allow inversion of a control signal to a preamplifier. The inversion control circuit may be enabled and disabled based on a physical conductive connection to a logic high voltage or a logic low voltage. One or more programmable control lines can determine whether the inversion function is activated when the inversion control circuit is enabled.

Patent Agency Ranking