公开(公告)号：US20120095712A1

公开(公告)日：2012-04-19

申请号：US13187942

申请日：2011-07-21

申请人： Yosuke KOMASAKI ,  Hiraku HIRABAYASHI

发明人： Yosuke KOMASAKI ,  Hiraku HIRABAYASHI

IPC分类号： G06F19/00 ,  H03M1/48

CPC分类号： G01D5/145 ,  G01D3/036

摘要： An angle detection unit including first to third arithmetic units receives first and second signals that are associated with intensities of components of a rotating magnetic field in mutually different directions. The first arithmetic unit generates a sum of squares signal made up of the sum of squares of the first and second signals. Based on the sum of squares signal, the second arithmetic unit calculates a first error component estimate which is an estimated value of a first error component included in the first signal and a second error component estimate which is an estimated value of a second error component included in the second signal. The third arithmetic unit generates a first corrected signal by subtracting the first error component estimate from the first signal, generates a second corrected signal by subtracting the second error component estimate from the second signal, and calculates a detected angle value based on the first and second corrected signals.

摘要翻译： 包括第一至第三运算单元的角度检测单元接收与相互不同方向的旋转磁场的分量的强度相关联的第一和第二信号。 第一算术单元产生由第一和第二信号的平方和组成的平方和信号。 基于平方和信号，第二算术单元计算第一误差分量估计，其是包括在第一信号中的第一误差分量的估计值和作为包括的第二误差分量的估计值的第二误差分量估计 在第二个信号。 第三算术单元通过从第一信号中减去第一误差分量估计来产生第一校正信号，通过从第二信号中减去第二误差分量估计来产生第二校正信号，并且基于第一和第二运算单元计算检测角度值 校正信号。

公开(公告)号：US20120119729A1

公开(公告)日：2012-05-17

申请号：US13205209

申请日：2011-08-08

申请人： Yosuke KOMASAKI ,  Hiraku HIRABAYASHI ,  Shunji SARUKI

发明人： Yosuke KOMASAKI ,  Hiraku HIRABAYASHI ,  Shunji SARUKI

IPC分类号： G01B7/30

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01D5/145

摘要： A rotating field sensor includes a first detection circuit that outputs a first signal indicating the intensity of a component of a rotating magnetic field in a first direction, a second detection circuit that outputs a second signal indicating the intensity of a component of the rotating magnetic field in a second direction, and an arithmetic circuit that calculates a detected angle value based on the first and second signals. Each of the first and second detection circuits includes at least one MR element row. Each MR element row is composed of a plurality of MR elements connected in series. Each MR element has a magnetization pinned layer. The plurality of MR elements forming each MR element row include one or more pairs of MR elements. Magnetization directions of the magnetization pinned layers in two MR elements making up a pair form a predetermined relative angle other than 0° and 180°.

摘要翻译： 旋转场传感器包括：第一检测电路，其输出表示第一方向上的旋转磁场的分量的强度的第一信号;第二检测电路，输出表示旋转磁场的分量的强度的第二信号 以及运算电路，其基于第一和第二信号计算检测角度值。 第一和第二检测电路中的每一个包括至少一个MR元件行。 每个MR元件行由串联连接的多个MR元件组成。 每个MR元件具有磁化固定层。 形成每个MR元件行的多个MR元件包括一对或多对MR元件。 构成一对的两个MR元件中的磁化钉扎层的磁化方向形成除了0°和180°之外的预定相对角度。

公开(公告)号：US20120053865A1

公开(公告)日：2012-03-01

申请号：US13176485

申请日：2011-07-05

申请人： Shunji SARUKI ,  Hiraku HIRABAYASHI ,  Yosuke KOMASAKI

发明人： Shunji SARUKI ,  Hiraku HIRABAYASHI ,  Yosuke KOMASAKI

IPC分类号： G01R15/00 ,  G01R33/09 ,  G01R33/02

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01D5/145

摘要： A first detection unit has first and second detection circuits. A second detection unit has third and fourth detection circuits. Output signals of the second and fourth detection circuits differ from output signals of the first and third detection circuits in phase, respectively, by an odd number of times ¼ the signal period. The output signal of the third detection circuit differs from the output signal of the first detection circuit in phase by an integer multiple of ⅙ the signal period other than an integer multiple of ½ the signal period. A rotating field sensor generates a first signal based on the output signals of the first and third detection circuits, generates a second signal based on the output signals of the second and fourth detection circuits, and calculates a detected angle value based on the first and second signals.

摘要翻译： 第一检测单元具有第一和第二检测电路。 第二检测单元具有第三和第四检测电路。 第二和第四检测电路的输出信号分别与第一和第三检测电路的输出信号分别相差奇数倍的信号周期。 第三检测电路的输出信号与第一检测电路的输出信号相位不同于信号周期的整数倍，除了信号周期的1/2的整数倍。 旋转场传感器基于第一和第三检测电路的输出信号产生第一信号，基于第二和第四检测电路的输出信号产生第二信号，并基于第一和第二检测电路计算检​​测角度值 信号。

公开(公告)号：US20120176126A1

公开(公告)日：2012-07-12

申请号：US13301076

申请日：2011-11-21

申请人： Hiroshi NAGANUMA ,  Hiraku HIRABAYASHI ,  Shunji SARUKI

发明人： Hiroshi NAGANUMA ,  Hiraku HIRABAYASHI ,  Shunji SARUKI

IPC分类号： G01B7/30

CPC分类号： G01R33/091 ,  G01D5/145 ,  G01R33/0011

摘要： A rotation angle sensor includes a magnet that rotates about a rotation axis. The magnet has an end face perpendicular to the rotation axis and has a magnetization in a direction perpendicular to the rotation axis. The rotation angle sensor further includes a magnetic sensor that faces the end face of the magnet and detects a magnetic field produced by the magnet. The magnet includes a plate-shaped portion including the end face, and a ring-shaped portion that is located on a side of the plate-shaped portion farther from the end face and coupled to the plate-shaped portion. The plate-shaped portion does not include any hollow through which the rotation axis passes, whereas the ring-shaped portion includes a hollow through which the rotation axis passes.

摘要翻译： 旋转角度传感器包括绕旋转轴线旋转的磁体。 磁体具有垂直于旋转轴线的端面，并且在垂直于旋转轴线的方向上具有磁化强度。 旋转角度传感器还包括面向磁体的端面的磁传感器，并且检测由磁体产生的磁场。 该磁体包括一个包括该端面的板状部分和一个环形部分，该环形部分位于距离该端面更远离该板状部分的一侧，并联接到该板状部分。 板状部分不包括旋转轴通过的任何中空部分，而环形部分包括旋转轴线通过的中空部分。

公开(公告)号：US20120038359A1

公开(公告)日：2012-02-16

申请号：US13166409

申请日：2011-06-22

申请人： Shunji SARUKI ,  Hiraku HIRABAYASHI

发明人： Shunji SARUKI ,  Hiraku HIRABAYASHI

IPC分类号： G01R33/09 ,  G01R33/00

CPC分类号： G01R33/093 ,  B82Y25/00

摘要： A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit detects, in the first position, a first angle that the direction of a first applied field forms with respect to a first direction. The first applied field includes the first partial magnetic field as its main component. A second detection unit detects, in the second position, a second angle that the direction of a second applied field forms with respect to a second direction. The second applied field includes the second partial magnetic field as its main component. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on detected values of the first and second angles.

摘要翻译： 场产生单元产生包括第一位置的第一部分磁场和第二位置的第二局部磁场的旋转磁场。 第一和第二部分磁场在180°方向上不同，并且沿相同的旋转方向旋转。 第一检测单元在第一位置检测第一施加磁场的方向相对于第一方向形成的第一角度。 第一施加场包括第一部分磁场作为其主要成分。 第二检测单元在第二位置检测第二施加磁场的方向相对于第二方向形成的第二角度。 第二施加场包括第二部分磁场作为其主要成分。 基于第一和第二角度的检测值来计算基准位置中的旋转磁场的方向相对于基准方向形成的角度的检测值。

公开(公告)号：US20090116143A1

公开(公告)日：2009-05-07

申请号：US12348655

申请日：2009-01-05

申请人： Hiraku HIRABAYASHI ,  Norikazu Ota

发明人： Hiraku HIRABAYASHI ,  Norikazu Ota

IPC分类号： G11B5/10

CPC分类号： G11B5/3116 ,  G11B5/1872 ,  G11B5/3136 ,  Y10T29/49032

摘要： A write shield layer that forms a part of a thin-film magnetic head is set with respect to the widthwise full length W thereof lying substantially on an air bearing surface that is opposite to the recording medium such that when the full length W is trisected, the maximum thickness H1/3side thereof in a range of widthwise ⅓ W size positioned at both ends thereof is larger than the average thickness Hm of the whole write shield layer from the air bearing surface up to the rear (H1/3side>Hm), so that the so-called external magnetic field resistance is improved, and inadvertent erasure of the information already recorded in the recording medium is avoided as much as possible. Besides, the PTP (pole tip protrusion) phenomenon arising from the generation of heat from coils, and external temperature changes can be held back.

摘要翻译： 形成薄膜磁头的一部分的写入屏蔽层相对于其宽度方向的全长W设置，其基本上位于与记录介质相对的空气轴承表面上，使得当全长W被三等分时， 位于其两端的横向1/3W尺寸的范围内的最大厚度H1 / 3侧大于整个写入屏蔽层从空气支承表面直到后部的平均厚度Hm（H1 / 3side> Hm ），使得所谓的外部磁场电阻提高，并且尽可能地避免已经记录在记录介质中的信息的无意擦除。 此外，可以阻止从线圈产生热量引起的PTP（极尖突起）现象以及外部温度变化。

公开(公告)号：US20120038351A1

公开(公告)日：2012-02-16

申请号：US13164427

申请日：2011-06-20

申请人： Shunji SARUKI ,  Hiraku HIRABAYASHI

发明人： Shunji SARUKI ,  Hiraku HIRABAYASHI

IPC分类号： G01B7/30

CPC分类号： G01R33/091 ,  G01D5/145

摘要： A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit located in the first position has first and second detection circuits whose output signals differ in phase by ¼ the period. A second detection unit located in the second position has third and fourth detection circuits whose output signals differ in phase by ¼ the period. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on a first signal generated from the output signals of the first and third detection circuits and a second signal generated from the output signals of the second and fourth detection circuits.

摘要翻译： 场产生单元产生包括第一位置的第一部分磁场和第二位置的第二局部磁场的旋转磁场。 第一和第二部分磁场在180°方向上不同，并且沿相同的旋转方向旋转。 位于第一位置的第一检测单元具有第一和第二检测电路，其输出信号的相位相差1/4。 位于第二位置的第二检测单元具有第三和第四检测电路，其输出信号的相位相差1/4。 基于从第一和第三检测电路的输出信号产生的第一信号和从第一和第三检测电路产生的第二信号来计算基准位置中相对于参考方向形成的旋转磁场的方向的角度的检测值 第二和第四检测电路的输出信号。

公开(公告)号：US20110025318A1

公开(公告)日：2011-02-03

申请号：US12836138

申请日：2010-07-14

申请人： Shunji SARUKI ,  Hiraku HIRABAYASHI

发明人： Shunji SARUKI ,  Hiraku HIRABAYASHI

IPC分类号： G01R33/02

CPC分类号： G01R33/091 ,  G01R33/0023 ,  G01R33/0029

摘要： A magnetic sensor for detecting a direction of an external magnetic field comprises: a bridge circuit configured to provide an output that changes in accordance with the direction of the external magnetic field, the bridge circuit including four resistance element sections, each of which comprises at least one magnetoresistance effect element; and two resistors connected to respective output terminals of the bridge circuit. The ratio of the resistance of each of the resistors to that of the bridge circuit is at least 2 when the resistance of each of the resistance element sections is at a minimum corresponding to a change in magnetoresistance.

摘要翻译： 用于检测外部磁场的方向的磁传感器包括：桥接电路，被配置为提供根据外部磁场的方向变化的输出，所述桥接电路包括四个电阻元件部分，每个电阻元件部分至少包括 一个磁阻效应元件; 和连接到桥式电路的相应输出端的两个电阻器。 当每个电阻元件部分的电阻为对应于磁阻的变化的最小值时，电阻器与电桥电路的电阻的比率至少为2。

公开(公告)号：US20110025321A1

公开(公告)日：2011-02-03

申请号：US12844091

申请日：2010-07-27

申请人： Hiroshi YAMAZAKI ,  Hiraku HIRABAYASHI ,  Naoki OHTA

发明人： Hiroshi YAMAZAKI ,  Hiraku HIRABAYASHI ,  Naoki OHTA

IPC分类号： G01R33/02

CPC分类号： G01R33/091 ,  G01D5/145

摘要： A magnetic sensor includes first to fourth MR elements. The first and second MR elements are connected at respective ends thereof through a first connecting portion in a central region. The third and fourth MR elements are connected at respective ends thereof through a second connecting portion that crosses the first connecting portion with a distance in a thickness direction in the central region. The first and fourth MR elements are connected at respective other ends thereof through a third connecting portion, and the second and third MR elements are connected at respective other ends thereof through a fourth connecting portion. Resistance values of the first and third MR elements change in a same increasing/decreasing direction, whereas resistance values of the second and fourth MR elements change in an increasing/decreasing direction opposite to the first and third MR elements, depending on an external signal magnetic field.

摘要翻译： 磁传感器包括第一至第四MR元件。 第一和第二MR元件通过中心区域中的第一连接部分在其相应端部连接。 第三和第四MR元件通过第二连接部分在其相应端部处连接，第二连接部分在中心区域中沿厚度方向的距离与第一连接部分交叉。 第一和第四MR元件通过第三连接部在其各自的另一端连接，第二和第三MR元件通过第四连接部在其各自的另一端连接。 第一和第三MR元件的电阻值以相同的增加/减小方向变化，而第二和第四MR元件的电阻值随着与第一和第三MR元件相反的增加/减小方向而变化，这取决于外部信号磁 领域。

公开(公告)号：US20080094755A1

公开(公告)日：2008-04-24

申请号：US11873666

申请日：2007-10-17

申请人： Norikazu OTA ,  Tetsuya ROPPONGI ,  Hiraku HIRABAYASHI ,  Yuichi WATABE

发明人： Norikazu OTA ,  Tetsuya ROPPONGI ,  Hiraku HIRABAYASHI ,  Yuichi WATABE

IPC分类号： G11B5/60

CPC分类号： G11B5/3136 ,  G11B5/102 ,  G11B5/1278 ,  G11B5/314 ,  G11B5/3169 ,  G11B5/3173 ,  G11B5/3967 ,  G11B5/6064

摘要： The present invention provides a thin-film magnetic head which surely improves the writing and reading characteristic with reducing the flying height and surely handles the contact or collision with the magnetic recording medium.A thin-film magnetic head is provided, which includes, an substrate with ABS; a read or write head element provided on an element-formed surface of the substrate; at least one protrusion adjustment portion whose end reaches a slider end surface on the ABS side, which provides on an element-formed surface of the substrate; at least one heating portion provided rear at least one protrusion adjustment portion viewed from the slider end surface on the ABS side.

摘要翻译： 本发明提供了一种薄膜磁头，其可以在降低飞行高度的同时确保提高写入和读取特性，并且可靠地处理与磁记录介质的接触或碰撞。 提供了一种薄膜磁头，其包括具有ABS的基板; 设置在所述基板的元件形成表面上的读或写头元件; 至少一个突起调节部分，其端部到达ABS侧的滑块端面，其提供在基板的元件形成表面上; 至少一个加热部分，设置在从ABS侧的滑块端面观察的至少一个突起调节部的后方。