公开(公告)号：US6118611A

公开(公告)日：2000-09-12

申请号：US948209

申请日：1997-10-09

申请人： Hidekazu Shibasaki ,  Hiroaki Ueno ,  Ken Yakuwa

发明人： Hidekazu Shibasaki ,  Hiroaki Ueno ,  Ken Yakuwa

IPC分类号： G11B5/00 ,  G11B5/02 ,  G11B19/02 ,  G11B5/09

CPC分类号： G11B5/02 ,  G11B19/02 ,  G11B2005/0016 ,  G11B2005/0018

摘要： A signal reproducing circuit for a magneto-resistive effect head includes a constant current source for supplying a sense current to an MR head in a read state, first constant current sources for supplying first constant currents to a pair of reproduction transistors in the read state, and a capacitor connected between the emitters of the transistors. Furthermore, second constant current sources for supplying second constant currents are connected in parallel with the first constant current sources. Control is given so that when switching an idle state to the read state is commanded, the second constant current sources remain on for a given period of time. Owing to this circuitry, a transient period during which the idle state is switched to the read state or a transient period during which heads are switched in the read state can be shortened to a great extent. Consequently, superposition of an unwanted offset component on a reproduced signal can be suppressed, and a loss in data-handling capacity can be minimized.

摘要翻译： 用于磁阻效应头的信号再现电路包括用于在读取状态下向MR磁头提供感测电流的恒流源，用于在读取状态下向一对再现晶体管提供第一恒定电流的第一恒定电流源， 以及连接在晶体管的发射极之间的电容器。 此外，用于提供第二恒定电流的第二恒流源与第一恒定电流源并联连接。 给出控制，使得当将空闲状态切换到读取状态时，第二恒定电流源保持打开一段给定的时间。 由于该电路，可以在很大程度上缩短空闲状态切换到读取状态的过渡时段或读取状态期间磁头切换的过渡时段。 因此，可以抑制再现信号上的不需要的偏移分量的叠加，并且可以最小化数据处理能力的损失。

公开(公告)号：US20080239560A1

公开(公告)日：2008-10-02

申请号：US12021468

申请日：2008-01-29

申请人： Ken Yakuwa ,  Tsuyoshi Takahashi

发明人： Ken Yakuwa ,  Tsuyoshi Takahashi

IPC分类号： G11B5/584

CPC分类号： G11B5/09 ,  G11B5/3136 ,  G11B5/6064

摘要： According to an aspect of an embodiment, a magnetic device comprises a head for writing data into or reading data from a medium, the head having an actuator for changing a flying height of the head over the medium, a storage for storing characteristic information of areas of the medium and a controller for controlling the actuator on the basis of the characteristic information of the areas of the medium when writing data into or reading data from the areas of the medium.

摘要翻译： 根据实施例的一个方面，磁性装置包括用于将数据写入介质或从介质读取数据的磁头，磁头具有用于改变磁头在介质上的飞行高度的致动器，用于存储区域的特征信息的存储器 以及用于在将数据写入或从介质的区域读取数据时基于介质的区域的特征信息来控制致动器的控制器。