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公开(公告)号：US4695908A
公开(公告)日：1987-09-22
申请号：US643542
申请日：1984-08-23
申请人： Shigeyoshi Imakoshi , Yutaka Soda , Hideo Suyama
发明人： Shigeyoshi Imakoshi , Yutaka Soda , Hideo Suyama
CPC分类号： G11B5/3903 , G11B5/09 , G11B5/3116
摘要： A thin film type magnetic transducer head comprises a magnetic substrate, and a thin film magnetic core formed on the substrate through an effective magnetic gap at one end of the substrate to be faced to a magnetic recording medium, the magnetic substrate and the thin film magnetic core forming a magnetic circuit to reproduce signals on the magnetic medium, wherein a length between a center of the magnetic gap and an edge of the magnetic core and wave length satisfy definite relations, thereby the S/N ratio and the output are improved in the digital magnetic recording.
摘要翻译： 薄膜型磁换能器头包括磁性基板和薄膜磁芯，该薄膜磁芯通过基板一端的有效磁隙形成在基板上，以面向磁记录介质，磁性基板和薄膜磁性 磁芯形成磁路以在磁介质上再现信号，其中磁隙的中心与磁芯的边缘和波长之间的长度满足确定的关系，从而S / N比和输出在 数字磁记录。
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公开(公告)号：US4703378A
公开(公告)日：1987-10-27
申请号：US705706
申请日：1985-02-26
CPC分类号： G11B5/02 , G11B5/3903 , G11B2005/0016
摘要： A magnetoresistance effect type magnetic transducer head apparatus comprises a magnetoresistance effect sensing element, means for applying a high-frequency magnetic field to the sensing element, means for taking-out an output signal from the sensing element, a filter for taking-out the high-frequency component of the output, and another filter for rectifying the output and taking-out the low-frequency component. The magnetic head apparatus may be constructed as a digital circuit so that a multi-channel apparatus can be easily implemented.
摘要翻译： 磁阻效应型磁换能器头装置包括磁电阻效应感测元件，用于向感测元件施加高频磁场的装置，用于从感测元件取出输出信号的装置，用于取出高频磁场的滤波器 输出的频率分量，以及用于整流输出和取出低频分量的另一个滤波器。 磁头装置可以构造为数字电路，使得可以容易地实现多通道装置。
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公开(公告)号：US4516179A
公开(公告)日：1985-05-07
申请号：US408025
申请日：1982-08-13
申请人： Shigeyoshi Imakoshi , Yutaka Soda , Hiroyuki Uchida , Junkichi Sugita , Hiroshi Takino , Tetsuo Sekiya , Hideo Suyama
发明人： Shigeyoshi Imakoshi , Yutaka Soda , Hiroyuki Uchida , Junkichi Sugita , Hiroshi Takino , Tetsuo Sekiya , Hideo Suyama
CPC分类号： G11B5/3903 , G11B5/3106 , G11B5/40
摘要： A magnetic transducer head utilizing magnetoresistance effect is disclosed which includes a thin film magnetoresistance effect element held between, first and second substrates, at least one of the first and second substrates being formed of an electrically conductive material, and a biasing means for the magnetoresistance effect element to satisfy a potential relation V.sub.MR -V.sub.S .ltoreq.0.2 volt, wherein V.sub.MR is a potential of the magnetoresistance effect element, and V.sub.S is a potential of the conductive substrate.
摘要翻译： 公开了一种利用磁阻效应的磁换能器头，其包括保持在第一和第二基板之间的薄膜磁阻效应元件，第一和第二基板中的至少一个由导电材料形成，以及用于磁阻效应的偏置装置 元件以满足VMR-VS
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4.发明授权
公开(公告)号：US4729048A
公开(公告)日：1988-03-01
申请号：US837810
申请日：1986-03-10
申请人： Shigeyoshi Imakoshi , Hideo Suyama , Hiroaki Yada , Toru Katakura , Tetsuo Sekiya , Masayuki Nakayama
发明人： Shigeyoshi Imakoshi , Hideo Suyama , Hiroaki Yada , Toru Katakura , Tetsuo Sekiya , Masayuki Nakayama
CPC分类号： G11B5/012 , G11B5/4886 , G11B5/5534 , G11B5/59633
摘要： A combination magnetic transducer head apparatus which can easily achieve initial formatting of data tracks of a rotating magnetic recording medium such as a hard disk without using a specific separate initial formatting system. The apparatus comprises a magnetic head for initial formatting, another magnetic head for servo control and a magnetic recording and playback head all mounted on a head slider. In the apparatus, at least one track is first recorded on a magnetic disk by the magnetic head for initial formatting and then another track is recorded by the magnetic recording and playback head while the first track is scanned by the magnetic head for servo control whereafter such a series of operations are repeated until completion of recording of all tracks required.
摘要翻译： 一种组合磁换能器头装置，其可以容易地实现诸如硬盘的旋转磁记录介质的数据轨迹的初始格式化，而不使用特定的单独的初始格式化系统。 该装置包括用于初始格式化的磁头，用于伺服控制的另一个磁头和全部安装在磁头滑块上的磁记录和重放头。 在该设备中，首先通过磁头将至少一个磁道记录在磁盘上用于初始格式化，然后由磁记录和重放磁头记录另一个磁道，同时第一磁道由用于伺服控制的磁头扫描， 重复一系列操作，直到完成所需的所有轨迹的记录。
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公开(公告)号：US4691259A
公开(公告)日：1987-09-01
申请号：US769937
申请日：1985-08-27
CPC分类号： G11B5/3903 , G11B5/03 , G11B5/3945
摘要： A magnetoresistance effect type magnetic head apparatus has a magnetoresistance effect sensing element, means for applying a bias magnetic field to the sensing element, a detecting circuit for obtaining a detecting signal, a low pass filter for deriving an unwanted signal component from the detecting signal, and means for applying a cancelling magnetic field to the sensing element so as to eliminate the unwanted signal component. An additional sensing element may also be provided to detect an external magnetic field, and a corresponding signal is generated which is applied to a first sensing element so as to cancel the effects of the external magnetic field.
摘要翻译： 磁阻效应型磁头装置具有磁阻效应感测元件，用于向感测元件施加偏置磁场的装置，用于获得检测信号的检测电路，用于从检测信号中导出不需要的信号分量的低通滤波器， 以及用于将抵消磁场施加到感测元件以消除不需要的信号分量的装置。 还可以提供附加的感测元件来检测外部磁场，并且产生施加到第一感测元件的相应信号，以便消除外部磁场的影响。
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公开(公告)号：US4734644A
公开(公告)日：1988-03-29
申请号：US841259
申请日：1986-03-19
CPC分类号： G01D5/142 , G11B5/3903
摘要： A yoke type magnetic transducer head utilizing a magnetoresistance effect in which a magnetoresistance effect sensing portion is provided so as to magnetically couple a cut-away portion in a magnetic circuit including an operation gap and a magnetic yoke having in its one portion the cut-away portion and in which a first bias magnetic field is applied to the magnetoresistance effect sensing portion by a first magnetic flux that is generated when a current is flowed through the magnetoresistance effect sensing portion, or when a current is flowed through both the magnetoresistance effect sensing portion and a bias conductor, which includes a hard magnetic layer for generating a second magnetic flux by which a second bias magnetic field is applied to the magnetoresistance effect sensing portion and for passing through the magnetic yoke a magnetic flux which cancels at least a part of the first magnetic flux which passes through the magnetic yoke.
摘要翻译： 一种利用磁阻效应的磁轭型磁换能器头，其中磁阻效应感测部分被设置为磁耦合包括操作间隙的磁路中的切除部分和在其一部分中被切除的磁轭 并且其中通过在电流流过磁阻效应感测部分时产生的第一磁通量或当电流流过磁阻效应感测部分两者时，第一偏置磁场施加到磁阻效应感测部分 以及偏置导体，其包括用于产生第二磁通量的硬磁性层，通过该硬磁性层将第二偏置磁场施加到磁阻效应感测部分，并且通过磁轭，磁通量抵消了至少一部分 第一磁通量通过磁轭。
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7.发明授权Magnetic transducer head utilizing magneto resistance effect with a bias field and partial saturation 失效磁传感器头利用具有偏置场和部分饱和的磁阻效应
公开(公告)号：US4524401A
公开(公告)日：1985-06-18
申请号：US333423
申请日：1981-12-22
申请人： Hiroyuki Uchida , Takehiro Nagaki , Shigeyoshi Imakoshi , Yutaka Soda , Junkichi Sugita , Tetsuo Sekiya
发明人： Hiroyuki Uchida , Takehiro Nagaki , Shigeyoshi Imakoshi , Yutaka Soda , Junkichi Sugita , Tetsuo Sekiya
CPC分类号： G11B5/3903
摘要： A magnetic transducer head utilizing a thin film magneto-resistance effect element is disclosed in which the amount of a DC bias magnetic field is so selected that only the end portion of the thin film magneto-resistance effect element serving as a contact surface with a magnetic medium is effectively given with sensitivity and the element is saturated in the vicinity of its central portion in its width direction.
摘要翻译： 公开了一种利用薄膜磁阻效应元件的磁转换头，其中直流偏置磁场的量如此选择，使得只有薄膜磁阻效应元件的端部作为具有磁性的接触表面 介质有效地被赋予灵敏度，元件在其中心部分的宽度方向附近饱和。
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公开(公告)号：US4896235A
公开(公告)日：1990-01-23
申请号：US298299
申请日：1989-01-17
申请人： Hiroshi Takino , Shigeyoshi Imakoshi, deceased , Nobuhiro Terada , Norio Saito , Hideo Suyama , Kenichiro Tsunewaki
发明人： Hiroshi Takino , Shigeyoshi Imakoshi, deceased , Nobuhiro Terada , Norio Saito , Hideo Suyama , Kenichiro Tsunewaki
CPC分类号： G11B5/3925 , G11B5/3903 , G11B5/3941 , G11B5/3954 , G11B5/3961 , G11B5/3964 , G11B5/398 , G11B5/399 , G11B5/3156
摘要： A MR magnetic head with a sensing element which comprises a plurality of superposed magnetic layers which have a magnetoresistance effect in at least one and a nonmagnetic intermediate layer sandwiched between the magnetic layers, and a sensing current is fed so as to flow in the sensing element in the same direction as a signal magnetic field which is applied to the element. Each of the magnetic layers is formed so as to have an easy axis of magnetization which is substantially perpendicular to the signal magnetic field or to have an isotropic magnetic characteristic in the magnetic film plane, which eliminates Barkhausen noise.
摘要翻译： 一种具有感测元件的MR磁头，其包括在夹在所述磁性层之间的至少一个磁阻效应和非磁性中间层中的多个重叠磁性层，并且馈送感测电流以在所述感测元件 在与施加到元件的信号磁场相同的方向上。 每个磁性层形成为具有基本上垂直于信号磁场的易磁化轴或者在磁性膜平面中具有各向同性磁特性，这消除了巴克豪森噪声。
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公开(公告)号：US4701815A
公开(公告)日：1987-10-20
申请号：US836714
申请日：1986-03-06
IPC分类号： G11B5/596
CPC分类号： G11B5/59655
摘要： A servo system for positioning a data transducer head relative to a plurality of substantially concentric data tracks on the surface of a magnetic disc including a pair of servo transducer heads for sensing the data tracks and generating output signals representative of a data signal written on the sensed track, a distance between the pair of servo transducer heads being related to the dimension of the data track and a distance between the servo transducer heads and the data transducer head being related to a data track pitch, a signal processing circuit connected to the pair of servo transducer heads for generating a data transducer head positioning signal and a positioning device for positioning the data transducer head in response to the transducer positioning signal and for maintaining the track centerline alignment of the data transducer head.
摘要翻译： 一种伺服系统，用于相对于包括一对伺服换能器头的磁盘表面上的多个基本上同心的数据磁道定位数据传感器头，用于感测数据磁道并产生表示写入感测到的数据信号的数据信号的输出信号 一对伺服传感器头之间的距离与数据轨道的尺寸相关，并且伺服换能器头与数据传感器头之间的距离与数据轨道间距相关，信号处理电路连接到一对 用于产生数据传感器头定位信号的伺服换能器头和用于响应于换能器定位信号定位数据换能器头并用于维持数据换能器头的轨道中心线对准的定位装置。
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公开(公告)号：US4679107A
公开(公告)日：1987-07-07
申请号：US643398
申请日：1984-08-23
申请人： Shigeyoshi Imakoshi , Yutaka Soda , Hideo Suyama , Yasuhiro Iida
发明人： Shigeyoshi Imakoshi , Yutaka Soda , Hideo Suyama , Yasuhiro Iida
CPC分类号： G11B5/3903 , G11B5/3925 , G11B5/465
摘要： A magnetic head utilizing the magnetoresistance effect comprising a magnetoresistance effect element and a conductor for applying a bias magnetic field to the element by being supplied with a bias current. The conductor is further supplied with a decaying alternating current superimposed on the bias current in advance of the playback operation, so that the hysteresis effect of the magnetic circuit is cancelled and the invariable output characteristics of the magnetic head are obtained.
摘要翻译： 利用磁阻效应的磁头包括磁阻效应元件和用于通过提供偏置电流向元件施加偏置磁场的导体。 在再现操作之前，导体还被提供叠加在偏置电流上的衰减交流电，从而消除磁路的滞后效应并获得磁头的不变输出特性。
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