公开(公告)号：US09070411B1

公开(公告)日：2015-06-30

申请号：US13935545

申请日：2013-07-04

Applicant: Seagate Technology LLC

Inventor： Timothy Ellis ,  Joshua W. Christensen ,  Ravi Hebbar ,  John Purkett ,  Justin Won

IPC: G11B5/09 ,  G11B20/14 ,  G11B5/596 ,  G11B20/12

CPC classification number: G11B5/59633 ,  G11B5/59627 ,  G11B5/59655 ,  G11B5/59661 ,  G11B20/10222 ,  G11B2020/1287

Abstract: Systems and methods are disclosed for writable servo zone overlap regions on a disc memory. An apparatus may comprise a controller configured to determine a servo gate (sgate) timing for an overlap zone including servo patterns of a first servo super zone and a second servo super zone of a disc memory, the sgate timing based on servo pattern timing for the first servo super zone and the second servo super zone. The controller may initiate writing to the overlap zone based on the sgate timing. The controller may also reduce the impact of servo pattern frequency change between zones by calculating a trajectory error prior to the crossing, and providing 1/X of the trajectory error into a servo feedback loop for a following X servo sampling points.

Abstract translation: 公开了用于盘存储器上的可写伺服区重叠区域的系统和方法。 装置可以包括：控制器，被配置为确定包括盘存储器的第一伺服超级区域和第二伺服超级区域的伺服模式的重叠区域的伺服门（sgate）定时，基于伺服模式定时 第一伺服超级区和第二伺服超区。 控制器可以基于sgate定时开始写入重叠区域。 控制器还可以通过计算交叉之前的轨迹误差来减小区域之间的伺服模式频率变化的影响，并且将轨迹误差的1 / X提供给用于后续X伺服采样点的伺服反馈回路。

公开(公告)号：US09318147B1

公开(公告)日：2016-04-19

申请号：US14050447

申请日：2013-10-10

Applicant: Seagate Technology LLC

Inventor： Barmeshwar Vikramaditya ,  Bruce Douglas Buch ,  Timothy Ellis

IPC: G11B20/10 ,  G11B19/04

CPC classification number: G11B20/10046 ,  G11B19/04 ,  G11B19/041 ,  G11B20/10009

Abstract: A circuit may be configured to reduce the amount of space used on a storage device when a transducer having a reader and writer passes from a writable data field to a read-only field by enabling both the reader and writer simultaneously. The circuit can be configured to reduce to a threshold level the noise on a read signal that can occur when the reader is over a read-only field and the writer is over a writable data field, and can ignore the read data when both the writer and reader are enabled simultaneously over a writable data field.

Abstract translation: 当具有读写器的换能器通过同时使读写器同时从可写数据字段传递到只读字段时，电路可以被配置为减少存储设备上使用的空间量。 该电路可以配置为将读取器超过只读字段并且写入器超过可写数据字段时可能发生的读取信号上的噪声降低到阈值水平，并且当写入器都可以忽略读取数据 并且阅读器在可写数据字段上同时启用。

公开(公告)号：US09558772B1

公开(公告)日：2017-01-31

申请号：US14245902

申请日：2014-04-04

Applicant: Seagate Technology LLC

Inventor： Timothy Ellis ,  Thomas Zirps

IPC: G11B5/596 ,  G11B5/55 ,  G11B5/012

CPC classification number: G11B5/5547 ,  G11B5/012 ,  G11B5/5521

Abstract: Methods and apparatuses for modulating a position error signal detection gate signal responsive to a track crossing velocity are discussed. The position error signal can be used to detect position information. A track crossing velocity can be estimated and then used via the modulating. Phase errors due to the track crossing velocity can be minimized.

Abstract translation: 讨论了响应于轨道交叉速度来调制位置误差信号检测门信号的方法和装置。 位置误差信号可用于检测位置信息。 可以估计轨道交叉速度，然后通过调制使用。 由于轨道交叉速度导致的相位误差可以最小化。