公开(公告)号：US09792940B2

公开(公告)日：2017-10-17

申请号：US13840962

申请日：2013-03-15

Applicant: Seagate Technology LLC

Inventor： Lin Zhou ,  Juil Lee ,  Dongming Liu ,  Huazhou Lou

IPC: G11B5/60

CPC classification number: G11B5/607 ,  G11B5/6076

Abstract: Using a high sample rate dPES, together with pulsed heater and lock-in technique, to improve dPES SNR for contact detection between the head and media surface. Steps of powering a transducing head actuator with pulsed input signal at a select data track offset from a previously-written to data track of the storage medium, where the pulsed input signal has select amplitude and duty cycle to simulate a response signal, and further locking in an amplitude with respect to the heater frequency, can lead to a determination of level of heater power for initiating contact between the transducing head and the storage medium.

公开(公告)号：US20140269241A1

公开(公告)日：2014-09-18

申请号：US13840962

申请日：2013-03-15

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Lin Zhou ,  Juil Lee ,  Dongming Liu ,  Huazhou Lou

IPC: G11B21/12

CPC classification number: G11B5/607 ,  G11B5/6076

Abstract: Using a high sample rate dPES, together with pulsed heater and lock-in technique, to improve dPES SNR for contact detection between the head and media surface. Steps of powering a transducing head actuator with pulsed input signal at a select data track offset from a previously-written to data track of the storage medium, where the pulsed input signal has select amplitude and duty cycle to simulate a response signal, and further locking in an amplitude with respect to the heater frequency, can lead to a determination of level of heater power for initiating contact between the transducing head and the storage medium.

Abstract translation: 使用高采样率dPES，连同脉冲加热器和锁定技术，以提高头部和介质表面之间的接触检测的dPES SNR。 在选择数据轨道上从脉冲输入信号偏移到存储介质的先前写入数据轨道的脉冲输入信号为脉冲输入信号供电的步骤，其中脉冲输入信号具有选择幅度和占空比以模拟响应信号，并进一步锁定 在相对于加热器频率的振幅中，可以导致确定用于启动换能头和存储介质之间的接触的加热器功率的水平。